<div style="text-align: center;">
<p style="text-align: left;"><strong>What is 3-Phase Power?</strong></p>
</div>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/shutterstock_187078571_1_1024x1024.jpg?v=1603736108" style="float: none;" width="1024x1024" height="1024x1024"></div>
<p><strong>Power Analogy</strong></p>
<p>Imagine a dark room with three treadmills and three distance runners. The runners are wearing special shoes that briefly light up with each step.</p>
<p><strong>Single-phase power</strong> is when one person is running while the others stand by. When a step is taken, the room lights up for a brief moment. In the moments between steps, the room stays dark.</p>
<p><strong>Three-phase power</strong> is when all three people are running simultaneously. They work together to make sure at least one runner's foot is down at all times to keep the room lit.</p>
<p>In this analogy, each runner represents a hot wire of a power distribution system and the light intensity represents the phase voltage.</p>
<p><strong>Power Distribution to Server Racks</strong></p>
<p>Electrical power is delivered from a generator to the electrical grid to industrial buildings in the form of <em>alternating</em> current (AC) three-phase power. Industrial buildings like data centers must decide how to further distribute this power to the IT equipment on server racks. At the most basic level, there are two options:</p>
<p style="padding-left: 30px;">Option #1: Distribute single-phase power to the racks. This typically involves power distribution through a single LINE (hot) wire and a NEUTRAL wire.</p>
<p style="padding-left: 30px;">Option #2: Distribute three-phase power to the racks. This typically involves power distribution through three LINE wires, one for each phase, and in some cases a NEUTRAL wire.</p>
<p>In North America, the LINE wires in a "208V" service typically have an oscillating voltage between -170V to +170V peak-to-peak with respect to the NEUTRAL wire. When discussing AC circuits, voltage RMS (the equivalent DC voltage) is used instead of peak voltages. For example, an AC voltage with 170V peak is referred to as 120VAC (Voltage Alternating Current).</p>
<p>In the single-phase plot below, positive voltages are represented by the left shoe, negative voltages by the right shoe. Notice both shoes provide the same amount of light at the peaks. In other words, the voltage polarity does not matter. Both are useful.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/1Phase_Blog_Drawing_LINE_NEUTRAL.png?v=1603737314" alt="Single Phase - Analogy Plot"></p>
<p>Single-phase rack power distribution units (PDUs) are designed to receive and distribute single-phase power to IT equipment. These PDUs are internally wired to deliver 120VAC (LINE-to-NEUTRAL) directly to the outlets. Equipment connected to these outlets will operate with 120VAC.</p>
<p>In comparison, a three-phase system has three LINE wires each measuring 120VAC with respect to the NEUTRAL wire. The plot below shows three-phase power with the LINE voltages overlaid. Notice how each LINE voltage is shifted in time. </p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/3Phase_Blog_Drawing_LINES_NEUTRAL.png?v=1603737772" alt="" style="float: none;"></div>
<div style="text-align: left;"></div>
<div style="text-align: start;">
<p>Three-phase rack PDUs are designed to receive three-phase power at the input and distribute three groups of single-phase outputs to the IT equipment. These PDUs are often wired in a delta configuration producing a higher voltage RMS at the outlets at 208VAC to 240VAC. Equipment connected to these outlets will operate with these higher voltages.</p>
<p>Higher voltages are achieved by internally wiring the outlets LINE-to-LINE instead of LINE-to-NEUTRAL. What happens when two runners have shoes that are lit up at the same time? The intensity of the light in the room increases. </p>
<p>The combined light is illustrated by the yellow line in the plot below. The plot is an example of an outlet that is wired LINE1-to-LINE2 which produces 208VAC. This translates to more power and higher efficiency for the connected equipment.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/3Phase_Blog_Drawing_Oulet_Plot.png?v=1603746103" alt="3-Phase Delta PDU: Outlet Voltage Plot" style="float: none;"></p>
<p>This analogy just scratches the surface but we hope it provides insight with a simplified model for thinking about 3-phase power.</p>
<p><strong>Our Solutions</strong></p>
<p>Synaccess offers a wide range of metered and smart rack PDUs for single-phase and three-phase power distribution.</p>
<ul>
<li>Metered PDUs provide reliable power distribution with local current meter displays.</li>
<li>SynLink smart PDUs are network connected with remote outlet switching and energy monitoring (kWh) features for complete control and visibility of your equipment.</li>
</ul>
<p>Contact us for a free consulation or request a free live demo to see our products in action. </p>
<p>---</p>
<p>Visit www.synaccess.com to learn more about SynLink Technology.</p>
<p><strong>Sales Contact</strong></p>
<div></div>
<div>sales@synaccess.com</div>
</div>
<div></div>
<div style="text-align: left;"></div>

Whitepapers

<p>"Single-phase power" is when one runner is on a treadmill while the other two stand by. When a step is taken, the room lights up for a brief moment. In the moments between steps, the room stays dark.</p>
<p>"Three-phase power" is when all three are running simultaneously. They work together to make sure at least one runner's foot is down at all times to keep the room lit.</p>

3-Phase Power Explained

<h3>Synaccess Releases Enterprise-Grade SynLink Smart PDUs</h3>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/banner-PDU2-zoom-crop.jpg?v=1628883782" alt="0U SynLink PDU Zoom"></p>
<p><strong>SynLink Smart PDUs extend Synaccess product line offering to the enterprise PDU market.</strong></p>
<p><strong><b>SAN DIEGO, California - Aug. 16, 2021</b><span> </span></strong>- Synaccess LLC ("Synaccess "), an industry leader in remote power management, announced today the launch of its new product line: SynLink Smart PDUs. The next-gen PDUs are available in hundreds of configurations ranging from compact 4-outlet single-phase to high capacity 36-outlet three-phase, delivering the most versatile product offering for remote monitoring and control on the market.<br><br>After years of research, development and testing, SynLink PDUs are rolling out nationwide this month and can be ordered online at synaccess.com.</p>
<p><strong>SynLink Highlights:</strong></p>
<ul>
<li>KWH - energy consumption monitor standard on every circuit.</li>
<li>Fastest PDU web interface on the market.</li>
<li>High-reliability relay health monitoring to predict failures before they occur.</li>
<li>Fully programmable with the Event/Action interface.</li>
<li>REST API with secure authentication and authorization using Personal Access Tokens.</li>
<li>User role management with configurable permissions.</li>
<li>Customizable LCD interface for local monitoring and control.</li>
<li>Self-monitoring processes for automatic recovery in mission critical applications.</li>
<li>Rugged design with 3-year standard warranty.</li>
<li>Safety certified to the new standard: UL/CSA 62368-1.</li>
</ul>
<p>"We took our time in designing this product from the ground up using lessons learned from thousands of mission critical remote PDU installations. We are officially disrupting the enterprise PDU market with our unique position and expertise in remote installations in a time where remote work has quickly become the new normal," says Mark Molina, COO and Head of Hardware Design Engineering.<br><br>Synaccess has established a new design center and manufacturing facility for the new SynLink product line in San Diego, CA. All SynLink PDUs are 100% designed and supported in the USA.</p>
<p><strong>Availability</strong><br><br>SynLink PDUs are available for purchase now. Free demos can be scheduled by contacting sales@synaccess.com. Series variations include SynLink Switched Pro+ and SynLink Monitored. Visit the <a href="https://synaccess.com/synlink-smart-pdus#synlink-page__comparison" target="_blank" title="Synaccess PDU Comparison Table" rel="noopener noreferrer">product comparison table</a> for more details. <br><br>---</p>
<p><strong>About Synaccess</strong><br><br>The Synaccess Networks netBooter™ PDU was created in 2003 in response to a need to remotely power-cycle equipment to prevent an engineer from making numerous journeys to the lab. For the past two decades, the netBooter has become one of the most well-known names in the remotely switched industrial PDU market. Today, the netBooter continues to be installed in thousands of applications around the world with no signs of slowing down.<br><br>Synaccess Networks Inc. established Synaccess LLC as an affiliate company in 2020 to design and manufacture high-density next-gen rack PDUs. <br><br>Our team has earned the trust of a deep customer base for remotely switched and energy monitoring applications. Check out our latest products and learn how you can leverage over 20 years of experience in smart power distribution technology.</p>
<p>To learn more about Synaccess, visit www.synaccess.com.<br><br>Media Contact<br><br>﻿press@synaccess.com</p>

Press

<p style="margin: 0in; font-family: Calibri; font-size: 11.0pt;">After years of research, development and testing, SynLink PDUs are rolling out nationwide this month and can be ordered online at synaccess.com.</p>

Synaccess Releases Enterprise-Grade SynLink Smart PDUs

<h3><strong>Synaccess Networks Inc. Reveals New Brand Identities with Redesigned Logos and Website for Affiliated Company Synaccess LLC.</strong></h3>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/SynaccessLLC_SynaccessAZ_Logos.png?v=1604354301" alt="" style="float: none;"></div>
<p><strong>Synaccess Networks Inc. has unveiled a new affiliate company, new logos, and new product release as part of an extensive rebranding initiative.</strong></p>
<p><b>SCOTTSDALE, Arizona - Oct. 26, 2020</b> - Synaccess Networks Inc. ("Synaccess Networks"), an industry leader in remote power management,  announced today the launch of its new corporate brand identity, redesigned logos, and new websites. These changes come at a time when the company is evolving its product offerings through its new affiliate company Synaccess LLC (the "Affiliate Company" or "Synaccess") and expanding its market reach.</p>
<p>"As we expand our vision and build more exciting products, we believe this is the right time to rebrand and bring in new talent that allows us to tell a better multi-product story," said Shawn Han, President of Synaccess Networks. "Our goal is to build a company that is loved by employees and customers alike."</p>
<p>Synaccess Networks will operate under a refreshed logo that all customers will be familiar with.</p>
<p>Synaccess will operate under a brand new logo that complements Synaccess Network's refreshed logo in its classic design.</p>
<p>The Synaccess Networks suite of industrial products will continue to include:</p>
<ul>
<li>
<b>netBooter</b>:  a time-tested industry favorite series of switched PDUs designed for remote installations.</li>
<li>
<b>netCommander</b>: a specialized series of switched console PDUs designed for remote serial console and power management.</li>
</ul>
<p>The Synaccess suite of enterprise products will include:</p>
<ul>
<li>
<b>SynLink</b>: a new flagship series of 1-Phase and 3-Phase high-powered intelligent rack PDUs designed for enterprise data centers.</li>
<li>
<b>Metered:</b>  a new cost-effective series of PDUs equipped with current meters and local displays for high-availability data centers.</li>
</ul>
<p>To learn more about Synaccess, visit <a href="http://www.synaccess.com">www.synaccess.com</a>.</p>
<p>---</p>
<p><strong>About Synaccess Networks Inc.</strong></p>
<p>Synaccess Networks Inc® designs, manufacture, and sells leading-edge power distribution units (PDUs). Our products are sold worldwide with an established reputation in the IT, engineering, manufacturing, and remote installation industries.</p>
<p>Synaccess Networks is a privately held company founded in 2003 in Carlsbad, California. The company was relocated to Arizona in 2013. We design, build and support our products in the USA. Our team has earned the trust of a deep customer base with over 20 years of experience in smart power distribution technology.</p>
<p>To learn more about Synaccess Networks, visit<span> </span><a href="https://www.synaccess-net.com/about">www.synaccess-net.com/about</a>.</p>
<p><strong>Media Contact</strong></p>
<p>﻿press@synaccess.com</p>

<p>Synaccess Networks Inc. Reveals New Brand Identities with Redesigned Logos and New Website for Affiliated Company Synaccess LLC. </p>
<p>Synaccess Networks Inc. has unveiled a new affiliate company, new logos, and new product release as part of an extensive rebranding initiative.</p>

Synaccess Networks Inc. Reveals New Brand Identities

<h3><strong>Synaccess Networks Inc. Forms New Affiliate Company, Synaccess LLC For New Enterprise Rack PDU Product Line</strong></h3>
<p><strong></strong><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/SynaccessLLC_Building.jpg?v=1603476052" style="float: none;"></p>
<p><strong>New Affiliate Company and leadership provide product market clarity, enables future growth of feature-rich, easy-to-use, and cost-effective enterprise rack PDUs.</strong></p>
<p><b>SCOTTSDALE, Arizona - Oct. 23, 2020</b> - Synaccess Networks Inc. ("Synaccess Networks"), an industry leader in remote power management,  announced today the formation of its new affiliate company Synaccess LLC (the "Affiliate Company" or "Synaccess") for the express purpose of designing and manufacturing enterprise-ready smart rack power distribution units (PDUs).</p>
<p>"In 2003, the <a href="https://www.synaccess-net.com/switched-pdu" target="_blank" title="netBooter PDUs" rel="noopener noreferrer">netBooter™</a> PDU was born from the need to remotely power cycle equipment to prevent countless trips to the engineering lab.", said Shawn Han, President &amp; Founder of Synaccess Networks. "Today, after almost two decades, the product continues to help thousands of customers and is installed in hundreds of thousands of remote locations."</p>
<p>The new affiliate company," says Kevin Han, CEO of Synaccess, "represents the natural progression of the Synaccess Networks Inc. business into the enterprise rack PDU marketplace."</p>
<p>Synaccess leadership will include Kevin Han as CEO, Allen Chu as CTO, and Mark Molina as COO.</p>
<p>With almost every nation in the world having imposed mandatory stay-at-home orders, remote management of Data Centers and IT equipment has become essential. "We took the best practices and lessons learned from thousands of remote PDU installations and built the all new and cost-effective smart rack PDU product lines designed for the Data Center," said Chu.</p>
<p>Synaccess has established a new design center and manufacturing facility to run operations in San Diego, CA.</p>
<p>To learn more about Synaccess, visit <a href="http://www.synaccess.com">www.synaccess.com</a>.</p>
<p>---</p>
<p><strong>About Synaccess Networks Inc.</strong></p>
<p>Synaccess Networks Inc® designs, manufacture, and sells leading-edge power distribution units (PDUs). Our products are sold worldwide with an established reputation in the IT, engineering, manufacturing, and remote installation industries.</p>
<p>Synaccess Networks is a privately held company founded in 2003 in Carlsbad, California. The company was relocated to Arizona in 2013. We design, build and support our products in the USA. Our team has earned the trust of a deep customer base with over 20 years of experience in smart power distribution technology.</p>
<p>To learn more about Synaccess Networks, visit<span> </span><a href="https://www.synaccess-net.com/about" target="_blank" rel="noopener noreferrer">www.synaccess-net.com/about</a>.</p>
<p><strong>Media Contact</strong></p>
<p>﻿press@synaccess.com</p>

<p>Synaccess Networks Inc. Forms New Affiliate Company, Synaccess LLC For New Enterprise Rack PDU Product Line</p>
<p>New Affiliate Company and leadership provide product market clarity, enables future growth of feature-rich, easy-to-use, and cost-effective enterprise rack PDUs.</p>

Synaccess Networks Inc. Forms New Affiliate Company, Synaccess LLC

<p><span>The power on sequencing of a smart PDU ensures that equipment connected to it receives power in a specific order and at a specific time interval to prevent electrical overload and damage to the equipment.</span></p>
<p><span>Power on sequencing can also be used to ensure that critical equipment is powered up first in the event of a power outage. For example, if a data center experiences a power outage, the smart PDU can be programmed to power on the most critical equipment, such as servers hosting essential applications, before other equipment.</span></p>
<p> </p>
<h3><span>How to set up Power On Sequencing </span></h3>
<p>You can set up power on sequencing via the web interface.</p>
<p>1. Set up your PDU according to the <a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">quick start guide </a>and have it accessible via it's IP address.</p>
<p> </p>
<p>2. Navigate to System -&gt; Outlets and set each outlet to stay OFF during PDU bootup. Set Power Up Initial State to OFF for each PDU</p>
<p> </p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_142249_e69ae58e-f49f-41c8-9b03-ce5fe3ad3e5c_1024x1024.png?v=1677709428" alt=""></p>
<p> </p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_142510_1024x1024.png?v=1677709572" alt=""></p>
<p> </p>
<p>3. Navigate to System - Groups and create a New Outlet Group. Set the Reboot Sequence Delay to the necessary waterfall delay timing.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_142842_1024x1024.png?v=1677709730" alt="" style="float: none;"></div>
<p> </p>
<p>4. Create a new action under Automation. Select Switch Outlet Group. and Select outlets ON.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_143257_1024x1024.png?v=1677709991" alt="" style="float: none;"></div>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_143357_1024x1024.png?v=1677710044" alt="" style="float: none;"></div>
<p>5. Create a new event under Automation. Select event type System Power Recovery Event, and choose any Bank for detection. Choose the action you created previously.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_143049_1024x1024.png?v=1677709860" alt="" style="float: none;"></div>
<p> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2023-03-01_145438_1024x1024.png?v=1677711446" alt=""></p>
<p> </p>
<p>The device should now turn on outlets in a sequence on bootup.</p>
<p>Voila!</p>
<p> </p>
<p> </p>

Guides

<span>The power on sequencing of a smart PDU ensures that equipment connected to it receives power in a specific order and at a specific time interval to prevent electrical overload and damage to the equipment.</span>

Power On Sequencing: Maximizing Efficiency and Reliability with Smart PDUs

<p>Smart power distribution units (PDUs) are becoming increasingly popular in data centers and other mission critical environments. These devices provide advanced power management capabilities, real time monitoring of power usage, remote control of outlets, and automatic alerts for power related issues. Role management is particularly useful for smart PDUs because it allows organizations to control who has access to critical power management functions and ensure power is being used efficiently and effectively.</p>
<p> </p>
<p>With SynLink PDUs, role management is done with creating custom user roles, and associated users with that role. When creating a custom user role, an administrator will be able allow users with that role to view/edit various settings, view/switch select outlets, view power consumption, and have access to other functions of the PDU.</p>
<p> </p>
<h2>Creating Custom User Roles</h2>
<p>1. Navigate to /settings/users</p>
<p><strong>Settings</strong> -&gt; <strong>Manage Users</strong></p>
<p>2. Select the green button <strong>"Create New Role"</strong></p>
<p> </p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot1_1024x1024.png?v=1676579479" alt="" style="float: none;"></div>
<p>3. Select a name for the role and select the permissions the user will have. </p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot2_1024x1024.png?v=1676579801" alt="" style="float: none;"></div>
<p>4. Click <strong>"Save" </strong> it will navigate you back to the User Management Page (/settings/users)</p>
<p>5. Click on <strong>"Create New User" </strong>or an existing user you would like to set to the permissions of the role you just created.</p>
<p>6. Set the user to the role you have just previously created under the Role Dropdown.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot3_1024x1024.png?v=1676579970" alt="" style="float: none;"></div>
<p> </p>
<p>When that user logs in, their ability to see and control the PDU will now follow the restrictions applied under that role. If multiple users are under that role and you make changes, all users will see that change.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot4_1024x1024.png?v=1676580122" alt="" style="float: none;"></div>
<p> </p>
<p><span>Still having issues? Contact us for help at support@synaccess.com.</span></p>

<span>Smart power distribution units (PDUs) are becoming increasingly popular in data centers and other mission critical environments. These devices provide advanced power management capabilities, real time monitoring of power usage, remote control of outlets, and automatic alerts for power related issues. Role management is particularly useful for smart PDUs because it allows organizations to control who has access to critical power management functions and ensure power is being used efficiently and effectively.</span>

Secure Critical Power Management Functions

<span>A poorly planned power distribution system can result in downtime, data loss, and potential equipment damage. Careful planning and consideration of redundant backup power distribution is essential to ensure the stability and reliability of the server rack infrastructure.</span>

Power Distribution Guide for Power Redundant Servers

<p>Dynamic DNS allows you to conveniently access your SynLink PDU with an easy, memorable domain name. We will discuss these terms in depth in the following sections, followed by instructions on how to setup Dynamic DNS on your home router.</p>
<p><strong>Prerequisite:</strong></p>
<p style="padding-left: 30px;">1. Basic concept of IP Addresses (i.e. Public IP vs. Local IP). Here's a short primer <a href="https://www.youtube.com/watch?v=7_-qWlvQQtY&amp;ab_channel=GeorgeNisbet" target="_blank" rel="noopener noreferrer">video</a> on the topic of IP addresses.</p>
<p style="padding-left: 30px;">2. Port Forwarding. See this previous <a href="https://www.synaccess.com/guides/how-to-setup-port-forwarding-for-synlink-pdus" target="_blank" rel="noopener noreferrer">guide</a> for details.</p>
<p style="padding-left: 30px;">3. The second half of this tutorial assumes that you have a router with built-in DDNS client. If your router does not have a DDNS client, see the section "﻿Routers without Built-in DDNS Support" for links on how to setup a stand-alone client.</p>
<p>To understand the need for Dynamic DNS, we first need to review DNS and domain names. </p>
<h3><span>What is a DNS? What is a Domain name?</span></h3>
<p>DNS stands for Domain Name Systems. It is a system created to solve a simple problem: it is difficult to remember multiple IP addresses of your favorite websites. A DNS server accomplishes this by keeping a "directory" of domain names, where each domain name is mapped to an IP address. An example of a domain name is "synaccess.com" or "google.com".</p>
<p>There are many free and public DNS servers. For example, Google's DNS server is at 8.8.8.8 while Cloudflare's is at 1.1.1.1.</p>
<p>A DNS server's "directory" is analogous to your phone's contacts list or an address book. With an address book, you don't have to remember your friend Steve's phone number. Instead, all you have to remember is his name in order to make call.</p>
<p>In a similar way, a DNS let's you access a website by only using it's domain name (i.e. synaccess.com). When you type in "synaccess.com" on your web browser, your computer will ask a DNS server, "what is the IP address of synaccess.com?". The DNS server looks up "synaccess.com" in its directory and gives your browser the IP address assigned to that domain. Then, your browser proceeds to communicate with a web-server with that IP. </p>
<h3>SynLink PDU is a Web-Server</h3>
<p>SynLink PDUs have a built-in web-server, meaning you can access it's web interface simply by typing in it's IP address on your web browser. This method works as long as your laptop and the PDU are in the same network.</p>
<p>If you need to access the PDU outside of your home network, you'll need to setup port forwarding (as discussed in this <a href="https://www.synaccess.com/guides/how-to-setup-port-forwarding-for-synlink-pdus">guide</a>). Then to access the PDU, you will need to remember the public IP of your home network. Here lies the  problem: not only it is difficult to remember IP addresses, your home network's IP address can change often and without notice.</p>
<h3>Why Setup Dynamic DNS?</h3>
<p>Your home network's public IP address changes often. This is not an uncommon occurrence because assigning a static, non-changing public IP is expensive. The frequency in which this change happens varies among Internet Service Providers. As a result, those who want to access web services hosted within their home network will have a hard time trying to keep track of their IP, especially if changes happen every week or so.</p>
<p><span>This is where Dynamic DNS becomes useful. Rather than having to remember a set of seemingly random numbers that is your public IP address, a domain name is instead assigned to your public IP. More importantly, when your public IP changes, a Dynamic DNS client will automatically re-assign your domain name to the new IP address.</span></p>
<h3>What do I need to setup Dynamic DNS?</h3>
<p>You need a Dynamic DNS service provider and a DDNS Updater Client to successfully implement DDNS.</p>
<p><strong>Dynamic DNS Service Provider</strong></p>
<p>Third-party DDNS services like NoIP, FreeDNS, or Dyn will provide the domain you want. Some require a small fee but most give you one domain for free.</p>
<p><strong>DDNS Updater Client</strong></p>
<p>This is a client software that runs inside your home network. This software is responsible for notifying the DDNS service that your public IP has changed and thus re-mapping your domain name to the new IP address. </p>
<p><strong>Routers with Built-in DDNS Support</strong></p>
<p>Many of today's routers make it easy to implement DDNS. Many have built-in DDNS updater client while others also provide a DDNS domain for free. I highly suggest that you use a router that have a built-in DDNS updater client because it eliminates the need of requiring another computer to host the client. The rest of this tutorial assumes that your router have a built-in DDNS client.</p>
<p><strong>Routers without Built-in DDNS Support</strong></p>
<p>If you're router does not support DDNS, you will need to setup a dedicated computer that is ideally always on inside your home network. If you are running a Windows system, follow this <a href="https://www.noip.com/support/knowledgebase/installing-the-windows-4-x-dynamic-update-client-duc/" target="_blank" rel="noopener noreferrer">guide</a>. For Ubuntu-based systems, follow this <a href="https://serdima.wordpress.com/2018/04/23/tutorial-updating-dynamic-dns-with-ddclient/" target="_blank" rel="noopener noreferrer">guide</a>. </p>
<h3>Steps to Setup Dynamic DNS</h3>
<p>The following are general steps to setup DDNS on your router. The specific router you use may slightly vary but the generic instructions should still apply.</p>
<ol>
<li>Go to your router's web interface and find out the DDNS services that it supports. The Dynamic DNS section is usually under "Network" or "Advanced". </li>
<li>Sign up for an account with any of the DDNS service that your router supports. Pick a domain that you like. You'll be provided with a username, password and a domain name. Take a note of this information and keep it secure.</li>
<li>Go back to your router's web interface and enter the information provided to you by your DDNS provider. Apply the changes and confirm it's a success. </li>
</ol>
<div><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-29_18-40-50.png?v=1643510637" alt="" style="display: block; margin-left: auto; margin-right: auto;"></div>
<div style="padding-left: 30px;">4. From then on, your domain name should be the persistent address of your home network.</div>
<ol></ol>
<p>To access your SynLink PDU, simply type in your home network's domain name followed by the port where you have port forwarded the PDU's web server. The syntax is <strong>http://[domain_name]:port</strong>.</p>
<p><span>Below is an example where we've assigned a Domain Name to our Public IP address via Dynamic DNS. The Domain Name in this example is </span><strong>https://demo.synaccess.com:2096/login</strong></p>
<p> </p>
<p><strong><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-16_18-29-28_480x480.png?v=1642386640" alt=""></strong></p>
<p> </p>

<span>Dynamic DNS allows you to conveniently access your SynLink PDU with an easy, memorable domain name. </span>

How to Assign a Domain to SynLink PDU using Dynamic DNS

In this guide, we will briefly discuss what Network Bridging is and how to set it up on your SynLink PDU.<br>
<ul></ul>
<p> </p>
<p><strong>Applications/use-cases:</strong></p>
<ol>
<li>Locations with limited number of Network Ports</li>
<li> Network Redundancy</li>
</ol>
<p><strong>Pre-requisites:</strong></p>
<ol>
<li>SynLink PDU</li>
<li>SynLink USB-to-Ethernet Accessory (Contact Synaccess for details)</li>
</ol>
<p> </p>
<h3>What is Network Bridging?</h3>
<p>Network Bridging allows you to share your PDU's internet connection to a networked device. This is useful in situations where you have limited Ethernet Ports and you have no room for another switch/router. It can also be used for network redundancy where you need to re-direct data packets through another network path.</p>
<p>On a typical setup, the PDU's primary network interface is connected to a larger network (i.e. the internet). Meanwhile, a networked device (i.e. a desktop computer) is connected to the PDU's secondary network interface. After setting up bridged mode, the PDU will forward network packets from one interface to the other, effectively sharing PDUs internet connection.</p>
<p>This feature is sometimes referred to as <strong>Ethernet Passthrough</strong> because the PDU can be seen as passing through the Ethernet connection to another device.</p>
<p> </p>
<h3>How to Enable Bridged Mode on SynLink?</h3>
<div style="padding-left: 30px;">1. Plug in the USB-to-Ethernet accessory to USB port on the front panel.</div>
<ol></ol>
<div><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_4_480x480.png?v=1643241064" alt="SynLink USB Port" width="182" height="364" style="display: block; margin-left: auto; margin-right: auto;"></div>
<ol>
<ol></ol>
</ol>
<div style="padding-left: 30px;">2. Access SynLink's Web Interface and navigate to <strong>Network-&gt;IP</strong>
</div>
<div style="padding-left: 30px;">3. Under the Secondary Network Interface section, click the drop-down box and choose Bridge Mode. Click Save. The PDU should now be in bridged mode.</div>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_5.png?v=1643241228" alt="SynLink Web Bridge Mode" style="margin-right: 28px; margin-left: 28px; float: none;"></div>
<div style="padding-left: 30px;">4. To test, plug in a network-capable device (i.e. Desktop Computer) to the USB-to-Ethernet adapter. That device should now have access to the PDU's network.</div>
<p> </p>
<h3>Enable/Disable Bridge Mode on Event Triggers</h3>
<p>When used with SynLink's Automation features, you can automatically enable and disable bridge mode based on a variety of Event Triggers such Network-Loss, Power-Loss, Circuit Breaker trip, etc.</p>
<p>The example below shows how you can enable Bridged mode when it detects network loss. Network loss is detected using AutoPing.</p>
<p style="padding-left: 30px;">1. <strong>Create "Turn On Bridge" Action</strong></p>
<ul>
<li>Go to Automation -&gt; Create New Action.</li>
</ul>
<ul>
<li>Give the action a name (i.e. "Turn On Bridge"). Choose <strong>Switch Secondary Network Interface</strong> for action type and set the <strong>Mode to Set to Bridge</strong>.</li>
</ul>
<p style="padding-left: 30px;"> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_6.png?v=1643242977" alt="SynLink Create Action"></p>
<p style="padding-left: 30px;"><span>2. </span><strong>Create Autoping Event</strong></p>
<ul>
<li>
<span>Go to Automation -&gt; Create New Event. Give the event a meaningful name. Choose AutoPing Timeout for event type.</span> </li>
</ul>
<ul>
<li><span>Under AutoPing Timeout Parameters, enter the IP address and the number of fails before action. Add the Action created in the previous step and click Save.</span></li>
</ul>
<p style="padding-left: 30px;"> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_7.png?v=1643243026" alt=""></p>
<p style="padding-left: 30px;"> </p>
<p>In this setup, the PDU will continually ping an IP address. After a certain number of failed pings (in this example, 10 times), the PDU will turn on a bridge mode.</p>
<p>For other Automation options, check out our other guide on <a href="https://synaccess.com/guides/autoping-device-and-network-monitor" target="_blank" rel="noopener noreferrer">AutoPing and Network Monitor</a>.</p>
<ol></ol>

<span>Network Bridging allows you to share SynLink's internet connection to a networked device. </span>

Use SynLink to Bridge Networks (Ethernet Passthrough)

<p>Port Forwarding allows computer or other networked devices in  local area network (i.e. LAN) to access devices on the public, wide area network (i.e. WAN, internet), and vice versa.</p>
<h2>Short Background:</h2>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<p>By default, in order to access SynLink PDUs web interface, you need to use a laptop or computer connected to the same local network as that of your PDU. For example, if your PDU is on your home network, your laptop/computer also needs to be on that same network. If you move your laptop/computer to a different network, say a coffee shop or your office, then you no longer will have access to your PDU. </p>
<p>Port Forwarding solves that problem by allowing devices on the public, wide area network (i.e. internet) to access devices on your local area network (i.e. home network). </p>
<div style="text-align: center;"></div>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-13_13-56-00_2048x2048.png?v=1642110974" alt="Port Forwarding Example"></p>
<p>For additional information on the concept behind Port Forwarding, check out this video on YouTube: <a href="https://www.youtube.com/watch?v=ZAbM0CnZzp4&amp;t=4s" target="_blank" rel="noopener noreferrer">https://www.youtube.com/watch?v=ZAbM0CnZzp4&amp;t=4s</a></p>
<p><em>Note: We are currently developing a Cloud platform that will also allow users to access their SynLink devices without Port Forwarding. Please <a href="https://www.synaccess.com/signup">Sign Up</a> to be the first to know when Synaccess Cloud is released.</em></p>
<h2>How to Setup Port Forwarding?</h2>
<p>First, you need to assign the PDU an IP address that won't change. You can do so by setting a Static IP or by Reserving a DHCP IP address. Using the latter option is typically preferred since it prevents you from using used IP addresses. If using a Static IP, make sure that the IP address is currently not or will not be used. See the Quick Start Guide for instructions on how to setup Static IP.</p>
<h4>Reserve DHCP IP address</h4>
<p><strong>Step 1: Set your SynLink PDU to DHCP mode.</strong></p>
<ol></ol>
<ol></ol>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/LCD_Screen_Gif_optimized_timingadjusted_160x160_96b477a2-9d08-4378-b70c-0ceebbbb8fd0.gif?v=1642385996" alt="lcd_dhcp_mode" style="float: none;"></div>
<p>On the front panel LCD Display, navigate to <strong>Network</strong> and change the Mode to <strong>DHCP</strong>. You should see IP address automatically change. <em>Take note of that IP address and the MAC Address.</em></p>
<p>Validate that you can access the PDU's web interface typing in the IP address on your favorite web browser's address bar. You should be greeted with a login screen where you can type in your credentials. By default, the user name is admin and the password is also admin.</p>
<p>See our <a href="https://www.synaccess.com/quick-start-guide.pdf">Quick Start Guide</a> if you are having problems connecting to your PDU.</p>
<p><strong>Step 2: Reserve SynLink PDU's IP address on your Router</strong></p>
<p>Your router's IP address and login information can be found on the router's label.</p>
<p>In this example, we will use TP-LINK wireless router as an example. Open a web browser and type in the address bar the IP address of your router. For TP-LINK routers, this is usually http://192.168.0.1 or http://tplinklogin.net. Then press Enter.</p>
<p><em>Note: Contact your Router manufacturer if you are unable to access or log-in to your router.</em></p>
<p>Click DHCP-&gt;Address Reservation on the left side and click Add New button.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-13_14-05-23.png?v=1642111536" alt="tp-link-dhcp-address-reservation"></p>
<p>Type in the MAC address, IP address, and Check the "Enable This Entry" option.</p>
<p>Click Save button to save the settings. Your PDU with the given MAC Address will always receive the reserved IP address when it connects to the router.</p>
<h4>Setup Port Forwarding</h4>
<p>Now that you have the PDUs IP address reserved, it's time to setup Port Forwarding on your router. </p>
<p><strong>Step 1: Login to your Router and locate the Port Forwarding Options</strong></p>
<p>The Port Forwarding page varies for every router. It may be buried under categories such as Advanced, NAT Forwarding, Wireless, or Network.</p>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-13_14-01-46.png?v=1642111416" alt="tp-link-port-forwarding"></div>
<p> </p>
<p>Type in the following information:</p>
<ul>
<li>
<strong>External Port</strong> - This is the Port that devices from external networks will use to access your internal network. Use ports that are available and are not frequently used by other applications. We recommend using the following ports depending on which protocol you are forwarding:</li>
<ul>
<li>HTTP: 8080, 8880, 2052, 2082, 2086, 2095</li>
<li>HTTPS: 2053, 2083, 2087, 2096, 8443</li>
</ul>
<li>
<strong>Internal IP</strong> - This is the IP address of your SynLink PDU.</li>
<li>
<strong>Internal Port </strong>- This is the port number of your PDU. It is set to 80 unless the settings are changed from default. You can also see the current port settings on the front panel LCD display under the Network tab.</li>
<li>
<strong>Protocol </strong>- Select All.</li>
</ul>
<p>Enable the Entry and click Save. </p>
<h2>Test your Port Forwarding Setup</h2>
<p>Take note of your router's public IP address. This is the IP address assigned to you by your ISP (Internet Service Provider). You can find this on your router's web interface, or by simply going to <a href="https://www.whatismyip.com/">https://www.whatismyip.com/</a>.</p>
<p>Then, using a device that is on an external network, type in http://[YourPublicIP]:[Port] on a web browser. An example would is <span style="text-decoration: underline;">http://211.25.22.52:2095/</span>. </p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-16_18-26-53_480x480.png?v=1642386432" alt="log-in-port-forward"></p>
<p><strong>Important Note:</strong> Your Public IP can change at anytime depending on your ISP. To avoid the hassle of keeping track of your Public IP, it is best to setup Dynamic DNS on your Router. </p>
<p>Below is an example where we've assigned a Domain Name to our Public IP address via Dynamic DNS. The Domain Name in this example is <strong>https://demo.synaccess.com/</strong></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-01-16_18-29-28_480x480.png?v=1642386640" alt="dynamic dns example"></p>
<p> </p>
<p>See our tutorial on <strong>How to Setup Dynamic DNS</strong> for details.</p>
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<h2></h2>
<h2>Frequently Asked Questions</h2>
<ul>
<li>
<p style="font-weight: 400;">I can access the web server with a computer within the same subnet. I've also setup the router to port forwarding but I still cannot access the PDU from outside network (internet).</p>
</li>
</ul>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<p><span>Make sure the "Default Gateway IP" setting under Network IP configuration matches the IP address of your Gateway. The IP address of the gateway is usually the IP of the router, which can be found on the router's label. It is set to 192.168.1.1 by default whereas your Gateway/Router IP could be different. For example, certain ISP set their Router's IP to 192.168.1.255. </span></p>
<h4><span>Additional troubleshooting steps:</span></h4>
<ul>
<li><span>Check if you can ping the Gateway from the PDU. You can do so by typing in the Gateway's IP address in the Ping Diagnostic tool on the Web interface in System-&gt;AutoPing.</span></li>
</ul>
<p><span> </span></p>
<ul>
<li><span>Make sure the port forwarding configuration on your Gateway is correct. The external port and the internal IP:Port should be correctly mapped.</span></li>
</ul>
<p><span> </span></p>
<ul>
<li><span>When you hit your public IP address, make sure you include the correct external port number as it's configured on your Gateway. For example, [YourPublicIP]:[Port].</span></li>
</ul>
<p><span> </span></p>
<ul>
<li><span>If you are port forwarding HTTPs, make sure that you include https:// in your URL (i.e. https://[YourPublicIP]:[Port]).</span></li>
</ul>
<p> </p>

Port Forwarding - How to Access SynLink PDUs over the Internet

<p>As interest in home mining grows, it becomes important to understand how to safely handle these ultra high power-consuming devices. Electricity, heat, and noise are just a few things that home miners need to consider. <br><br>Of these considerations, power is the most dangerous and the least understood.<br><br>This guide aims to clear up the confusion.</p>

Power Distribution Guide for Home Mining

<p>In addition to safe and reliable power delivery, SynLink PDUs give you fully secured, remote out-of-band access to your important assets such as servers, bitcoin/crypto miners, network devices, desktop PCs, etc.</p>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_d4bec590-f9f7-45a8-96e7-720d6be987a0_2048x2048.gif?v=1637271386" alt="console_server_description" style="float: none;"></div>
<h2>What is out-of-band access?</h2>
<p>Out-of-band refers to the way you can access your device “outside” of its typical (in-band) channels. Servers, routers, switches, miners, desktop PCs, etc. are typically connected to the local network and the internet via an Ethernet port. HTTP requests and other types protocols must physically go through this channel. In most cases, an Ethernet port or WIFI card is referred to as the in-band access, because it is the primary channel of communication to the device. <strong>Out-of-band access is any method of communication that does not rely and is independent of primary channel of communication.</strong></p>
<h2>Why do you need remote, out-of-band access?</h2>
<p><span style="font-weight: 400;">Without an out-of-band access, you are limited to two ways you can access your host. First is the traditional method which is discussed above. While the first method is typically robust, it is not uncommon for equipment/hosts to malfunction and lose connection to the network. In some cases, legacy devices simply do not have network access. When this happens, your next option is to pay a visit to that equipment and debug the issue locally. This situation typically requires the user to travel, which costs time and other valued resources. </span></p>
<p><span style="font-weight: 400;">SynLink PDUs provide you with a simple solution. Using relay switches, the PDU can cold boot your computer. If that fails, you can use the PDU’s console server to access the console and recover your system.</span></p>
<h2>What is a console server and why is it an out-of-band solution?</h2>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/ezgif.com-gif-maker_2_480x480.gif?v=1637194365" alt="console_server_example" width="480x480" height="480x480" style="float: none;"></div>
<p> </p>
<p>In this guide, I will show you how you can configure your SynLink PDU as a console server. A console server is simply a device that gives you remote, out-of-band access to your host’s command line (also referred to as shell/console/terminal). A console server accomplishes this by tapping into your host’s other method of communication: <em>Serial Port</em>.</p>
<p>Serial communication is ubiquitous and it is always accessible regardless of the device’s internet connectivity. SynLink PDU gives you remote access to this serial communication, thus giving you a secondary out-of-band communication in case your primary connection fails.</p>
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<h2>Common Serial/Console Cabling Setup</h2>
<p>Serial ports vary from system to system. We discuss below the most commonly found serial ports, as well as the cabling required to connect to your SynLink PDU.</p>
<p> </p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/serial_console_cabling_2048x2048.png?v=1637192070" alt="serial cable setup" style="float: none;"></div>
<table style="width: 100%;">
<tbody>
<tr>
<th><strong>Target Device Console Port</strong></th>
<th><strong>Cable Types to Use</strong></th>
<th><strong>Notes</strong></th>
</tr>
<tr>
<td>Cisco RJ45</td>
<td>RJ45 to USB-A<br>RJ45 to RJ45 Rollover Console Cable</td>
<td>The USB cables have embedded USB-to-Serial Converter Chips (i.e. FTDI)</td>
</tr>
<tr>
<td>DB9</td>
<td>DB9 to RJ45<br>DB9 to USB-A</td>
<td>The USB cables have embedded USB-to-Serial Converter Chips (i.e. FTDI)</td>
</tr>
<tr>
<td>USB <br>(w/ built-in USB-Serial Converter)</td>
<td>USB Male to USB-A Male</td>
<td>Hosts with built-in Serial-to-USB Converter can connect directly to the "USB" port using a USB male-to-male cable.</td>
</tr>
<tr>
<td>USB<br>(without built-in USB Serial Converter)</td>
<td>USB Male to USB-A Male</td>
<td>If your target device does not have a built-in USB-Serial converter, you can still access it by using SynLink's USB "COM" port. SynLink PDUs have a built-in USB-Serial converter which allows you to connect to virtually any types of hosts.</td>
</tr>
</tbody>
</table>
<p> </p>
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<h2>Setting up the Console Server</h2>
<ol>
<li style="font-weight: 400;"><span style="font-weight: 400;">Determine the Serial Cabling you are going to use. See the previous section for a guide on how to choose the proper cabling to access your device’s console. </span></li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Connect the serial cable to the Host’s serial port and to SynLink PDU’s serial port.</span></li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Access the PDU's web interface by typing in the IP address of the PDU on your favorite browser. You should be greeted with a login screen. Login with your credentials.</span></li>
<li style="font-weight: 400;">Navigate to <em>Settings-&gt;Ports. </em>Here you will setup Baud Rate of the Serial Port you used. If using <em>RJ45 Port A</em>, then set the <i>Mode</i> to <em>Modem </em>mode first before setting the <em>Modem Baud Rate</em>.</li>
<ol>
<li style="font-weight: 400;">
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-18_09-18-43_2048x2048.png?v=1637256011" alt="synlink port settings" style="float: none;" width="2048x2048" height="2048x2048"></div>
</li>
</ol>
<li style="font-weight: 400;"><span style="font-weight: 400;">Access the the PDU's console via SSH or Telnet. You can use desktop app like Putty or Minicom. See section 3.3 of the <a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">Quick Start Guide</a> for details on how to connect to the PDU via SSH.</span></li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Type in modem status. Confirm that the port you are using is not being used.</span></li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Type in modem connect. Confirm the port you want to access. You should then have access to your host’s console. Press ‘Enter’ a couple times to show your Host’s response.</span></li>
<ol>
<li style="font-weight: 400;">
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/ezgif.com-gif-maker_3_1024x1024.gif?v=1637258293" alt="connect to console example" style="float: none;" width="1024x1024" height="1024x1024"></div>
</li>
</ol>
<li style="font-weight: 400;"><span style="font-weight: 400;">There you have it. You now have access to your device's serial console!</span></li>
</ol>
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<h2>For computers without a Serial Port, use the native USB Port</h2>
<p>Many of today's computers no longer provide a dedicated serial port. However, most do have a USB port which you can use to access the console. You just need to perform a  few extra steps on your target computer, which I describe below:</p>
<p>For Linux-based devices:</p>
<ol>
<li>Using a USB male-to-male cable, connect the USB port of your device to the USB <em>COM</em> port on the SynLink PDU.</li>
<li>On your command terminal, type in the following command: <strong>dmesg | grep "SynLink USB" -A 10</strong>
</li>
<ol>
<li>It should return a response similar to below. Note where the SynLink USB-Serial is attached (i.e. ttyUSB0)</li>
<li>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-18_10-25-27_1024x1024.png?v=1637259974" alt="synlink ftdi usb" style="float: none;" width="1024x1024" height="1024x1024"></div>
</li>
</ol>
<li>On the command terminal, type in the following with sudo access:</li>
<ol>
<li>Set the baudrate:</li>
<ol>
<li>stty -F /dev/ttyUSB0 115200</li>
</ol>
<li>Redirect shell to to ttyUSB0:</li>
<ol>
<li>systemctl enable serial-getty@ttyUSB0.service</li>
<li>systemctl start serial-getty@ttyUSB0.service</li>
</ol>
</ol>
<li>Access the PDU's web interface and navigate to the Port Settings (i.e. Settings-&gt;Ports). Set the COM port mode to <em>Modem and Com Baud Rate </em>to match the Baud Rate set it previous step (i.e. 115200).</li>
<ol>
<li>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-18_10-25-27_caaebb33-36af-4bd9-8cb4-7f14b2f168e1_2048x2048.png?v=1637260385" alt="panel port settings" style="float: none;" width="2048x2048" height="2048x2048"></div>
</li>
</ol>
<li>SSH/Telnet into your PDU. See section 3.3 of the <a href="https://synaccess.com/quick-start-guide.pdf">Quick Start Guide</a> for details on how to connect to the PDU via SSH/Telnet.</li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Type in modem status. Confirm that the port you are using is not being used.</span></li>
<li style="font-weight: 400;"><span style="font-weight: 400;">Type in modem connect. When prompted which serial port to access, type in usb_com. Press ‘Enter’ a couple times to get your Host’s response. You should now have access to your device's console via the native USB port.</span></li>
<ol>
<li>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/ezgif.com-gif-maker_4_1024x1024.gif?v=1637260968" alt="console via usb" style="float: none;" width="1024x1024" height="1024x1024"></div>
</li>
</ol>
</ol>
<p>For any questions/comments/concerns, please don't hesitate to contact us via phone or email. Thanks for reading!</p>
<p>*WLAN requires additional accessory</p>
<p>**Embedded 4G modem is available on select models only</p>

Out-Of-Band Console Server

<h3></h3>
<h3><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_1_2048x2048.png?v=1637113128" alt=""></h3>
<h3>SynLink PDUs with Cellular 4G LTE for a Complete Remote Solution</h3>
<p>With 4G LTE cellular connectivity, rest assured that you will always have remote access to your valuable assets even when your internet connection goes down. </p>
<h2>Prerequisites</h2>
<ul>
<li>SynLink Smart PDU with 4G LTE Modem (SP-1001AIE-01-M01)</li>
<li>Activated SIM Card (Contact Synaccess on how to purchase and activate a SIM card)</li>
<li>Network Configured/Connected Setup (<a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">Quick Start Guide</a>)</li>
<li>Web Browser</li>
</ul>
<br>
<ul></ul>
<h2>Initial Setup</h2>
<p><em>Important: Remove power from the PDU before following the steps below. It is important that the PDU is turned off before inserting SIM.</em></p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Untitled_Diagram.drawio_1_2048x2048.png?v=1637113128" alt="synlink_4g_pdu" style="float: none;"></div>
<ol>
<li>Unscrew the cap covering the SIM card slot and insert the activated SIM card. Screw back the cap.</li>
<li>Screw on the antenna on the antenna slot. </li>
<li>Plug the network Ethernet cable.</li>
<li>Plug in power to the PDU. The control module will automatically turn on. After a few seconds of boot up, the LCD should display PDU settings. Navigate to the Network section and take note of the IP address</li>
</ol>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<h2>Modem Status and Allowed Phone Numbers </h2>
<p>The web interface is the easiest way to display status and configure the 4G LTE modem. Using your favorite Web browser, access the web interface via the IP address of the PDU.</p>
<ol>
<li>Navigate to the <em>SMS Configuration</em> section: Network-&gt;SMS</li>
<li>You should see two sections. The <em>Status and Configuration</em> section should automatically refresh and show you all important modem statistics (i.e. Cell Phone number, Signal Strength, etc.). Click <em>Refresh</em> to update the status. Click the <em>Help Icon (?) </em>for definition of each field.</li>
<ol>
<li>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sms_section_94041d7c-16d0-4fb5-9140-bd634f913906_2048x2048.png?v=1637023134" width="2048x2048" height="2048x2048" style="float: none;"></div>
</li>
</ol>
<li>Under <em>Permitted SMS Phone Numbers</em>, you can specify which phone numbers are allowed to communicate with the PDU. When entering phone number, make sure to include the country code and only enters the digits. Do not include special characters such as +,-,(), etc.</li>
</ol>
<p> </p>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<h2>Verify SMS Connection </h2>
<p><em>Important: PDU's cell phone number can be found in Network-&gt;SMS-&gt;Status and Configuration-&gt;Cell Phone Number</em></p>
<ol>
<li>Using a cell phone included in "<em>Permitted SMS Phone Numbers</em>", text "<strong>get token</strong>" to the PDU's cell phone number.</li>
<li>You should receive a message with a random string. If so, then you've completed the setup and you are now able to manage your PDU via SMS. If you did not receive a random string, then see <em>Troubleshooting FAQs </em>below.</li>
</ol>
<p> </p>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<h2>SynLink SMS Commands and Protocol</h2>
<p> Make sure your cell phone is included in the <em>Permitted SMS Phone Numbers</em>. </p>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<p>To execute a command, the user needs to input a token. A token can be generated using "get token" command.</p>
<p>Detailed Description of the Commands List:</p>
<ul>
<li><strong>get token</strong></li>
<ul>
<li>Returns a 5 character random string that is used to execute other commands</li>
<li>There is only one token valid at any given time.</li>
<li>Token is only valid for one command. After successful command, the token is discarded. </li>
<li>If command is unsuccessful, token is not discarded and may be reused.</li>
</ul>
</ul>
<div>
<ul>
<li><strong>ping [token] [ip address]</strong></li>
<ul>
<li>pings an ip address and returns status</li>
</ul>
<li><strong>outlet [token] [outlet#] [on|off|reboot]</strong></li>
<ul>
<li>turns on/off/reboot an outlet and returns status</li>
</ul>
</ul>
</div>
<div style="padding-left: 30px;"></div>
<div>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<ul>
<li>
<div>
<div><strong> status [token] [network|outlet|sensors]</strong></div>
</div>
</li>
<ul>
<li>status [token] network</li>
<ul>
<li>Returns the IP configuration of the PDU</li>
</ul>
<li>status [token] outlet [outlet #]</li>
<ul>
<li>Returns information about specific outlet (i.e. state, current, power, etc.)</li>
</ul>
<li>status [token] sensors</li>
<ul>
<li>Returns the temperature and humidity readings if a sensor is attached (purchased separately)   </li>
</ul>
</ul>
</ul>
The protocol for communicating with the PDU over SMS is summarized in the flow chart below.<br>
<ul>
<ul>
<ul></ul>
</ul>
</ul>
</div>
<div style="text-align: start;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/SMS_Protocol.drawio_1024x1024.png?v=1637113467" style="float: none;" width="1024x1024" height="1024x1024"></div>
<div style="padding-left: 30px;"></div>
</div>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<h2>SMS Alerts</h2>
<p>You can configured your PDU to send you SMS alerts to notify you of an event. A list of all events can be found <a href="https://www.synaccess.com/support/webapi#event-codes-table" target="_blank" title="synlink event codes" rel="noopener noreferrer">here</a>. </p>
<p> The example below shows a setup where the user is alerted via text message if the internet network connection goes down.</p>
<ol>
<ol>
<ol>
<li>Navigate to Automation section and click on "New Action"</li>
<ol>
<li><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sms_nav_2048x2048.png?v=1637113879" alt=""></li>
</ol>
<li>In resulting <em>Create New Action </em>page, choose <em>SMS Action </em>in the <em>Action Type </em>drop down box.</li>
<li>Type in the <em>Action Name </em>and<em> </em>the Cell Phone number that will receive the SMS alert.</li>
<ol>
<li><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sms_new_action3_2048x2048.png?v=1637114061" alt=""></li>
</ol>
<li>Click <strong>Save</strong>.</li>
<li>Navigate to Automation section and click <em>Create New Event. </em>
</li>
<ol>
<li><em></em></li>
</ol>
</ol>
</ol>
</ol>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<ol>
<ol>
<ol>
<li><em><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sms_event3_2048x2048.png?v=1637114129" alt=""></em></li>
</ol>
<li>Pick an <em>Event Type</em> and provide an <em>Event Name</em>. For this example, we picked AutoPing Timeout.</li>
<li>Type in a target IP address. This IP address could be a host outside of your network. Failing to Ping this host should mean that you lost network connection.</li>
<li>Under <em>Add Existing Action for Event</em>, choose the SMS action we created in step 2. Click Save.</li>
<li>You should be able to see the new Event you created like below.</li>
<ol>
<li><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sms_done_2048x2048.png?v=1637114246" alt=""></li>
</ol>
</ol>
</ol>
<p>That's it! You will receive a text message when the PDU detects a network outage. You can test this by unplugging the ethernet cable from the PDU followed by an SMS alert!</p>
<p> </p>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<h2>Troubleshooting/FAQs</h2>
<ul>
<li>I texted "get token" to the PDU cell phone number but I get no response.</li>
<ul>
<li>Make sure that your cell phone number is in the <em>Permitted SMS Phone Numbers.</em> <em> </em>See<em> Modem Status and Allowed Phone Numbers </em>section for details<em>.<br></em>
</li>
</ul>
</ul>

SynLink PDU with Cellular 4G capability can be managed via SMS messages. This guide will walk you through how to perform initial setup, and check the status of the embedded 4G modem. We will cover the SMS protocol as well as how to send SMS alerts.

SMS Set Up and Protocol on Cellular-Enabled SynLink PDUs

<h3></h3>
<h3>Firmware Update &amp; Factory Reset SynLink Devices Without Interrupting Outlet Operations</h3>
<p><span>SynLink PDUs are able to be factory reset or updated without interrupting outlet operations. User permissions are required in order to factory reset and firmware update.</span></p>
<p><span>Contact Synaccess support for the most up to date firmware for your model &amp; configuration. </span></p>
<p> </p>
<h2>Prerequisites</h2>
<ul>
<li>SynLink Smart PDU</li>
<li>Network Configured/Connected Setup (<a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">Quick Start Guide</a>)</li>
<li>Web Browser</li>
<li>Firmware Update File (for firmware updates)<br><br>
</li>
</ul>
<h2>Firmware Update Web Instructions</h2>
<p><span><em>As best-practice, if firmware updating multiple PDUs we recommend performing this firmware update on a single unit, and verifying that the update is successful before deploying it on additional PDUs.</em><br></span></p>
<p><span>Firmware Update Through Web Interface<br><strong></strong>Navigate to Settings -&gt; Firmware Update (/settings/firmware-update)<br><br>Under Section "Firmware Upgrade" click on button "Upload File" <br></span></p>
<p><span><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-36-52_480x480.png?v=1636148221" alt="firmware update button from web interface"><br><br></span></p>
<p><span>Upload a provided firmware file. Contact us a support@synaccess.com for the most up to date firmware for your device.</span></p>
<p><span><br><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-38-20_480x480.png?v=1636148321" alt="firmware update progress image"></span></p>
<p><span>Allow a few minutes for the firmware update to process. Once finished, click the "Reboot Now" button and the device should restart in normal operational mode.</span></p>
<p><span><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-41-06_480x480.png?v=1636148478" alt=""></span></p>
<p>When the web interface connects to the PDU again, perform a hard refresh in your browser. Hold down the Shift key on your keyboard and click on the reload icon on your browser's toolbar. </p>
<div>
<h2>Firmware Update USB Drive Instructions</h2>
<em>As best-practice, if firmware updating multiple PDUs we recommend performing<span> </span>this firmware update on a single unit, and verifying<span> </span>that the update is successful before deploying it on additional PDUs.</em>
</div>
<div></div>
<div>Firmware Update via USB requires the following permissions found on<br>Settings -&gt; Ports (/settings/serial)<br><br><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-46-11_480x480.png?v=1636148807" alt=""><br><br>1. Create a single partition on your USB drive and format it with FAT partition.</div>
<div>2. On USB's root directory, create folder named synlink_update.</div>
<div>3. Copy the firmware package file into the synlink_update directory.</div>
<div>4. Plug in the USB flash drive to the SynLink PDU's USB host port labeled 'USB' and firmware upgrade will start automatically. Follow the instructions on the LCD interface after update completes.</div>
<div></div>
<div></div>
<br>
<div><em>Note: There should only be one firmware package file in the synlink_update directory</em></div>
<div></div>
<div></div>
<br>
<div><strong>Error Codes:</strong></div>
<br>
<div>1. Update Failed on Secondary Flash</div>
<div>2. Update Failed on Primary Flash</div>
<div>3. Unable to find firmware file</div>
<div>4. Update already in progress</div>
<div>5. USB upgrade not allowed. Please enable in web/shell<br>255. More than one firmware file detected<br>256. Generic Error Code</div>
<div></div>
<div></div>
<div>
<br>
<h2>Factory Reset Web Instructions</h2>
The following instructions require access to the web interface and allowed permissions. </div>
<div>
<br>Access the Factory Reset section in Settings -&gt; Reset &amp; Restart (/settings/backup-restore). Click on "Reset All Settings" to issue the factory reset.<br><br>
</div>
<div>
<br><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-48-13_480x480.png?v=1636148911" alt="">
</div>
<div></div>
<div><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-05_14-48-36_480x480.png?v=1636148931" alt=""></div>
<div>
<br>Once confirmed, the device to reset all settings to the default:<br><br><strong>Static IP</strong>: 192.168.1.100<br><strong>Username</strong>: admin<br><strong>password</strong>: admin<br><br>
</div>
<div></div>
<div>
<h2>Factory Reset Local Interface Instructions</h2>
<p>Make sure you are out of the screensaver mode. Hold down the top and bottom button of the row of three buttons by the LCD for 10+ seconds. The screen will reset which indicates the PDU is going through a factory reset sequence.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/unnamed_1_480x480.png?v=1671131253" alt=""></p>
<div></div>
</div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div>
<h2></h2>
<h2></h2>
</div>
<div></div>

<span>SynLink PDUs are able to be factory reset or updated without interrupting outlet operations. User permissions are required in order to factory reset and firmware update.</span>

Firmware Update Or Factory Reset SynLink Devices

<h3>Quickly integrate SynLink functionality into any system with an enterprise set of networking protocols and well documented APIs.</h3>
<p><span>HTTP(S) API, SSH/Serial/Telnet CLI, and SNMP</span><span> are </span><span>programming interfaces </span><span>which</span><span> allow scripting and integration within larger systems. See examples of API usage with these programming interfaces.</span></p>
<p><br><a href="https://synaccess.com/support/webapi" target="_blank" rel="noopener noreferrer">HTTP API Documentation</a></p>
<p><a href="https://synaccess.readme.io/reference/introduction-1" target="_blank" rel="noopener noreferrer">Cloud API Documentation</a></p>
<p><a href="https://synaccess.com/support/cliapi" target="_blank" title="Command Line Interface" rel="noopener noreferrer"></a><a href="https://synaccess.com/SYNLINK-MIB.txt" target="_blank" title="MIB File" rel="noopener noreferrer">SNMP MIB File </a></p>
<p><a href="https://synaccess.com/support/cliapi" target="_blank" title="Command Line Interface" rel="noopener noreferrer">CLI API Documentation</a></p>
<p> </p>
<p><a href="https://synaccess.com/SYNLINK-MIB.txt" target="_blank" title="MIB File" rel="noopener noreferrer"></a>Prerequisites</p>
<ul>
<li>SynLink Smart PDU</li>
<li>Network Configured/Connected Setup (<a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">Quick Start Guide</a>)</li>
</ul>
<h2>HTTP(S) API Usage</h2>
<p>The following examples use CURL to issue HTTP requests.</p>
<p><br><strong>NodeJS API Wrapper Library is available</strong></p>
<ul>
<li><a href="https://github.com/synaccess/SynLink-PDU-NodeJS-API" title="https://github.com/synaccess/SynLink-PDU-NodeJS-API">https://github.com/synaccess/SynLink-PDU-NodeJS-API</a></li>
<li><a href="https://www.npmjs.com/package/synlink-pdu" target="_blank" rel="noopener noreferrer">https://www.npmjs.com/package/synlink-pdu </a></li>
</ul>
<p><strong>Python API Wrapper Library is available</strong></p>
<ul>
<li><a href="https://github.com/synaccess/synlink-py" target="_blank" rel="noopener noreferrer">https://github.com/synaccess/synlink-py</a></li>
<li><a href="https://pypi.org/project/synlinkpy/" target="_blank" rel="noopener noreferrer">https://pypi.org/project/synlinkpy/ </a></li>
</ul>
<h4><span>Personal Access Token Authentication</span></h4>
<p><span>Personal Access Token authentication involves manually creating a personal access token and using it in each request to the SynLink HTTP API.</span></p>
<p><a href="https://synaccess.com/support/webapi#personal-access-token-based" target="_blank" title="personal access token" rel="noopener noreferrer">Get access to HTTP API through PATs (Personal Access Tokens)</a></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot14_1024x1024.png?v=1632955485" alt=""></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot15_8bdf5284-23e8-4a3d-9994-e4e69e5651b8_1024x1024.png?v=1632956125" alt=""></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot16_480x480.png?v=1632955785" alt=""></p>
<div style="text-align: left;"></div>
<div style="text-align: left;"></div>
<div style="text-align: left;">Example Request for Device Information with Authentication Token</div>
<div style="text-align: left;">
<pre class="hljs"><br>curl -H <span class="hljs-string">"Authorization: Bearer 2bCDp4lqfKEFl8r6l4s"</span> http://192.168.1.100/api/device<br><br></pre>
</div>
<h4><span>Basic HTTP Authentication</span></h4>
<p><em>Looking to have backwards compatibility with NetBooter products? Enable HTTP Basic Authentication</em></p>
<p>In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic &lt;credentials&gt;;</p>
<p><strong>Default: </strong>Basic HTTP Authentication denied</p>
<p>Navigate to Network -&gt; Web  <em>(/network/web) </em>to enable Basic Authentication.</p>
<h4><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-11-03_11-39-29_480x480.png?v=1635964895" alt="basic authentication button on web interface"></h4>
<h4></h4>
<h4>Get Inlet Power Consumption Information</h4>
<p><span>Inlet consumption information can be found with endpoint </span><code>/api/inlets</code><span>. This will return an array of inlets. For standard inlet PDU configurations, a single inlet object will be found inside this array. If the PDU is configured as an ATS pdu, or a dual circuit PDU, there will be two inlets.</span></p>
<p><a href="https://synaccess.com/support/webapi#list-all-inlets" target="_blank" title="List All Inlets JSON" rel="noopener noreferrer">List All inlet Information</a></p>
<p> </p>
<pre class="hljs">curl <span class="hljs-string">'http://192.168.1.100/api/inlets'</span> \
  --header <span class="hljs-string">'Authorization: Bearer rKKHIKivalp6ihp6e09'</span></pre>
<pre class="hljs">[
  {
    <span class="hljs-attr">"inletType"</span>: <span class="hljs-string">"single"</span>,
    <span class="hljs-attr">"inletPlug"</span>: <span class="hljs-string">"IEC-320 C20"</span>,
    <span class="hljs-attr">"inletPhase"</span>: <span class="hljs-string">"Single Phase"</span>,
    <span class="hljs-attr">"inletName"</span>: <span class="hljs-string">"Example New Inlet Name"</span>,
    <span class="hljs-attr">"id"</span>: <span class="hljs-string">"I1-1000016"</span>,
    <span class="hljs-attr">"inletLineConfiguration"</span>: <span class="hljs-string">"L-N"</span>,
    <span class="hljs-attr">"inletCurrentRms"</span>: <span class="hljs-number">0</span>,
    <span class="hljs-attr">"inletVoltageRms"</span>: <span class="hljs-number">114.69999694824219</span>,
    <span class="hljs-attr">"inletLineFrequency"</span>: <span class="hljs-number">60.13800048828125</span>,
    <span class="hljs-attr">"inletPowerFactor"</span>: <span class="hljs-number">1</span>,
    <span class="hljs-attr">"inletActivePower"</span>: <span class="hljs-number">0</span>,
    <span class="hljs-attr">"inletApparentPower"</span>: <span class="hljs-number">0</span>,
    <span class="hljs-attr">"inletEnergyAccumulation"</span>: <span class="hljs-number">0</span>
  }
]</pre>
<h4><strong>Turn Outlets On or Off</strong></h4>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div>
<div>
<span>To modify an outlet's state or setting, all you need is the outlet number. Options for state are: </span><span>`"ON"`</span><span>, </span><span>`"OFF"`</span><span>, "</span><span>`REBOOT`</span><span>".</span>
</div>
</div>
<p><a href="https://synaccess.com/support/webapi#turn-an-outlet-off-or-on" target="_blank" title="turn on outlet on or off" rel="noopener noreferrer">Change Outlet State</a> </p>
<pre class="hljs"><br>curl <span class="hljs-string">'http://192.168.1.100/api/outlets/1-1200568'</span> \
  --request <span class="hljs-string">"PUT"</span> \
  --header <span class="hljs-string">'Authorization: Bearer rKKHIKivalp6ihp6e09'</span> \
  --data <span class="hljs-string">'{ "state":"ON" }'</span></pre>
<p> </p>
<h2>SSH and Serial Command Line Interface Usage</h2>
<p><strong>Access SSH or Telnet with username and password</strong></p>
<p>Execute the<span> </span><code>ssh</code><span> </span>command with username and IP address separated by an @. A prompt for admin password will appear. Once properly authenticated, SynLink Shell Help Menu will appear.</p>
<p><a href="https://synaccess.com/support/cliapi#accessing-cli" target="_blank" title="Access CLI Windows and More" rel="noopener noreferrer">Full Examples and Windows 10 Examples</a></p>
<pre><code class="language-shell">$ ssh admin@192.168.1.100
The authenticity of host '192.168.1.100 (192.168.1.100)' can't be established.
ECDSA key fingerprint is SHA256:VZMUPw2MrIA3d8797SDEzuWZRxJAo9bLMMUO/Jw.
Are you sure you want to continue connecting (yes/no)? 
admin@192.168.1.100's password: 
-----------------------
SynLink Shell Help Menu
-----------------------

Usage: [command] [options...]

Press Tab to autocomplete commands

Commands 

  [n]etwork      Show and configure network info 
  [s]ystem       Show and Configure PDU power, control, sensors, etc
  [set]tings     Manage PDU settings
  [m]odem        Access a connected modem
  [l]ogs         See various logs

  ping [host]    Send ping to specified host
  [h]elp         Returns this message
  [ex]amples     Common example commands
  [exit]         Exits SynLink Shell


SynLink&gt; </code></pre>
<h4></h4>
<h4>Accessing SSH with Public Keys</h4>
<p>Configure SSH for trusted devices to skip username/password authentication.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot14_1024x1024.png?v=1632955485" alt=""></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot17_1024x1024.png?v=1632957251" alt=""></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot18_1024x1024.png?v=1632957266" alt=""></p>
<p> </p>
<h4>Scripting SSH with Command Line Interface</h4>
<p><a href="https://synaccess.com/support/cliapi#ssh-scripting" target="_blank" title="SSH Scripting" rel="noopener noreferrer">Pass commands to SSH as arguments.</a> Use tab to autocomplete words.</p>
<h5 id="return-device-information-in-human-readable-format">Return inlet information in human readable format</h5>
<pre><code>$ ssh admin@192.168.1.100 "system inlet status"</code><br>----------------- <br>Inlet Information <br>----------------- <br>Inlet Plug | IEC-320 C20R <br>Inlet Name | IEC-320 C20R Inlet <br>Inlet ID | I1-1000036 <br>Inlet Line | L-N <br>Energy Accumulation | 6.73 kWh <br>Current RMS | 0.38 A <br>Voltage RMS | 116.10 V <br>Line Frequency | 60.16 Hz <br>Power Factor | 0.96 <br>Active Power | 42.29 W <br>Apparent Power | 43.96 VA</pre>
<h5 id="return-device-information-in-json-format">Return device information in JSON format</h5>
<pre><code>$ ssh admin@192.168.1.100 "system inlet json"
[ <br> { <br> "inletType":"single", <br> "inletPlug":"IEC-320 C20R", <br> "inletPhase":"Single Phase", <br> "inletName":"IEC-320 C20R Inlet", <br> "id":"I1-1000036", <br> "inletLineConfiguration":"L-N", <br> "inletCurrentRms":0.38119998574256897, <br> "inletVoltageRms":116.19999694824219, <br> "inletLineFrequency":60.13800048828125, <br> "inletPowerFactor":0.96274548768997192, <br> "inletActivePower":42.639999389648438, <br> "inletApparentPower":44.290000915527344, <br> "inletEnergyAccumulation":6.7277789115905762 <br> } <br>]<br></code></pre>
<h5 id="return-device-information-in-json-format-and-parse-for-model-number">Return inlet information in JSON format and parse for Inlet Current RMS</h5>
<p><em>Requires jq (json parsing tool)</em></p>
<pre><code>$ ssh admin@192.168.1.100 "system inlet json" | jq .[0].inletCurrentRms<br>0.37869998812675476</code></pre>
<p> </p>
<h4>Access Serial CLI</h4>
<p><a href="https://synaccess.com/support/cliapi#serial-scripting" target="_blank" title="Serial Scripting" rel="noopener noreferrer">Serial Scripting Examples</a></p>
<p>Get tty configuration:</p>
<p><code>stty -F /dev/ttyUSB0</code></p>
<p><br><span>Change baud rate:</span></p>
<p><code>stty -F /dev/ttyUSB0 115200</code></p>
<p><br><span>Write to Serial Port:</span></p>
<p><code>echo "system status" &gt; /dev/ttyUSB0</code></p>
<p><br><span>Read from Serial Port:</span></p>
<p><code>cat /dev/ttyUSB0</code></p>
<p><code></code></p>
<p><code></code></p>
<h4 id="set-outlet-off">Set Outlet Off</h4>
<p><code></code></p>
<pre><code class="language-shell"></code></pre>
<p><em>Configure tty with appropriate configurations beforehand</em></p>
<p>Identify outlet ID beforehand by printing list of outlets:<span> </span><code>system outlet status</code></p>
<p>Requires pre login to be able to issue commands.</p>
<pre><code class="language-shell">user@host:~$ echo "system outlet set outlet_state 1-100001 OFF" &gt; /dev/ttyUSB0
</code></pre>
<p>or</p>
<pre><code class="language-shell">user@host:~$ sudo sh -c "echo 'system outlet set outlet_state 1-100001 OFF' &gt;&gt; /dev/ttyUSB0"</code></pre>
<p> </p>
<h4>Get Inlet Current RMS with SNMP</h4>
<pre><code class="language-shell">user@host:~$ snmpget -v2c -c public 192.168.1.100 .1.3.6.1.4.1.21728.4.2.1.1.17.1<br>SYNLINK-MIB::inletCurrentRms.1 = INTEGER: 38</code></pre>
<h4>
<br>Set Outlet State with SNMP</h4>
<pre><code class="language-shell">user@host:~$ snmpset -v2c -c private 192.168.1.100 .1.3.6.1.4.1.21728.4.5.1.1.7.1 i 0<br>SYNLINK-MIB::outletState.1 = INTEGER: open(0)</code><code class="language-shell"><br></code><br><br><br><br></pre>

<span>HTTP(S) API, SSH/Serial/Telnet CLI, and SNMP are programming interfaces which allow scripting and integration within larger systems. See examples of API usage with these programming interfaces.</span>

Scripting Outlet Switching and Energy Measurements

<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/LCD_Screen_Gif_600x600.gif?v=1632944471" alt="Control Module Live LCD" style="margin-bottom: 50px; float: none;" width="600x600" height="600x600"></div>
<p>SynLink PDUs feature a customizable 1.8" vibrant display with dynamic push button functionality. Keep scrolling to learn about the most versatile PDU control panel on the market.</p>
<h2>Features Highlights</h2>
<ul>
<li><strong><span style="color: #ff2a00;">Connect to a Network</span></strong></li>
<ul>
<li>Set network IP, subnet, gateway, and type (DHCP/Static).</li>
</ul>
<li><strong><span style="color: #ff2a00;">Toggle an Outlet</span></strong></li>
<ul>
<li>View status and toggle custom named outlets.</li>
</ul>
<li><span color="#ff2a00" style="color: #ff2a00;"><b>Customize Display</b></span></li>
<ul>
<li>
<strong></strong>Customizeable screensavers, color themes, and screen orientation.</li>
</ul>
<li><span color="#ff2a00" style="color: #ff2a00;"><b>Audit Power Consumption</b></span></li>
<ul>
<li>KWH, Voltage RMS, Current RMS, and more.</li>
</ul>
<li><span color="#ff2a00" style="color: #ff2a00;"><b>Monitor Environment Sensors</b></span></li>
<ul>
<li>Live temperate and humidity readings from sensor attachments.</li>
</ul>
<li><span style="color: #ff2a00;"><strong>Prevent Unauthorized Access</strong></span></li>
<ul>
<li>Front-panel security lockout prevents tampering.</li>
</ul>
</ul>
<h3><span style="color: #ff2a00;"><b>Connect to a Network</b></span></h3>
<p>A major benefit of having our engineers handle tech support is customer feedback quickly turns into product improvements. </p>
<p>In legacy PDUs, a recurring theme for tech support is helping users determine the PDU's dynamically assigned IP address. SynLink PDUs were designed to address this issue by displaying the assigned IP on the front panel.</p>
<p><strong>Choose between DHCP and STATIC assignment with a few button presses.</strong></p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/LCD_Screen_Gif_optimized_timingadjusted_e07f491a-1550-48b5-9adb-72e7f567dc63_160x160.gif?v=1632962680" alt="changing from static to dhcp and back on lcd interface"></div>
<div style="text-align: center;"></div>
<p> </p>
<p><strong>Buttons with dynamic functionality make it easy to set an IPV4 static IP address.</strong></p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/set_static_ip_sequence_optimized_160x160.gif?v=1632962172" alt="set static ip on lcd screen" style="float: none;"></div>
<p> </p>
<h3><span color="#ff2a00" style="color: #ff2a00;"></span></h3>
<h3><span color="#ff2a00" style="color: #ff2a00;">Toggle an Outlet</span></h3>
<p>Quickly identify the state of each switched outlet.</p>
<p>When toggling outlets on or off, you will be asked for final confirmation to prevent accidental shutdowns.</p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/power_cycle_outlet_lcd_only_optimized_diff_adjusted_timing_160x160.gif?v=1632967684" alt="power cycle asic miner demo on lcd screen" style="float: none;"></div>
<p> </p>
<h3><span color="#ff2a00" style="color: #ff2a00;">Customize Display</span></h3>
<p>Choose a screensaver to show power metrics, outlet status, or go lights-out by turning the display off.</p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screensaver_lcd_only_optimized_diff_160x160.gif?v=1632967728" alt="screensaver lcd screen demo" style="float: none;"></div>
<div style="text-align: center;"></div>
<div style="text-align: center;"></div>
<p> </p>
<p>Upcoming screensavers:</p>
<ul>
<li>*Custom message (update screen using SSH-based command line instruction, HTTP API, or interactive web UI)</li>
<li>Temperature &amp; Humidity</li>
<li>Time &amp; Date</li>
<li>and many more...!</li>
</ul>
<p>* Note: only available in firmware version 2.6.XX or later. Ask us for the update!</p>
<div style="text-align: center;"></div>
<p><strong>Rotate the screen for PDUs installed in different orientations or change the display brightness.</strong></p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/LCD_Settings_Brightness_Orientation_600x600.png?v=1632957655" alt="" style="float: none;"></div>
<p> </p>
<p><strong>Apply a custom color theme.</strong></p>
<div style="text-align: left;">
<img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/magenta_160x160.png?v=1632965242" alt="purple theme lcd" style="float: none;" width="160x160" height="160x160"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/grey_160x160.png?v=1632965280" alt="grey theme lcd" width="160x160" height="160x160" style="float: none;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/green_160x160.png?v=1632965395" alt="green theme lcd" width="160x160" height="160x160" style="float: none;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/black_160x160.png?v=1632965474" alt="black theme lcd"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/orange_160x160.png?v=1632965492" alt="orange theme lcd"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/purple_160x160.png?v=1632965509" alt="purple theme lcd"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/red_160x160.png?v=1632965532" alt="brown theme lcd"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/teal_160x160.png?v=1632965546" alt="teal theme lcd">
</div>
<div style="text-align: left;"></div>
<div style="text-align: left;"></div>
<div style="text-align: left;"></div>
<div style="text-align: left;"></div>
<div style="text-align: left;"></div>
<p> </p>
<h3><span style="color: #ff2a00;"><b>Audit Power Consumption</b></span></h3>
<p>Detect issues with phase balancing by scrolling through power metrics on the PDU input, circuit, and outlet levels. Check on energy consumed by connected equipment (KWH), useful in bill-back applications.</p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/inlet_data_lcd_only_optimized_diff_adjusted_timing_160x160.gif?v=1632967639" alt="lcd inlet power measurements demo" style="float: none;"></div>
<div style="text-align: center;"></div>
<p> </p>
<h3><span style="color: #ff2a00;"><b>Monitor Environment Sensors</b></span></h3>
<p>SynLink PDUs support up to two plug-n-play temperature &amp; humidity sensors. Place one on the front of the rack and one on the back to get readings on the hot and cold aisles.</p>
<p><a href="https://synaccess.com/signup" target="_blank" title="Subscribe link for new product releases" rel="noopener noreferrer">Subscribe</a> to get notified about upcoming new sensors such as vibration detection, contact closure, and more.</p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/sensor_lcd_only_optimized_diff_160x160.gif?v=1632967759" alt="sensor data on lcd screen demo" style="float: none;"></div>
<p> </p>
<h3><span color="#ff2a00" style="color: #ff2a00;">Prevent Unauthorized Access</span></h3>
<p>Secure the PDU in remote installations by editing permissions that disable functionality. This prevents unauthorized or accidental tampering.</p>
<p>The example below uses the web UI to disable switching outlets or configuring networking parameters from the LCD interface. </p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Web_UI_LCD_Permissions_480x480.png?v=1632957904" alt="LCD Permissions Settings" style="float: none;"></div>
<p> </p>
<p> </p>
<p><a href="https://synaccess.com/products/sp1001a" title="SynLink Switched Pro+ 1U PDU">Learn more</a><span> </span>about the SynLink Switched Pro+ PDU or click<span> </span><a href="https://synaccess.com/how-to-buy" title="Contact us - request a quote - how to buy">here</a><span> </span>to contact us and request a quote.</p>
<div>
<div class="blog-parent">
<p>Liked this article?</p>
</div>
</div>
<div>
<div><a target="_blank" href="https://www.facebook.com/sharer.php?u=https://synaccess.com/articles/guides/autoping-device-and-network-monitor" rel="noopener noreferrer"></a></div>
</div>
<p>Let us know or request more screensavers by <a href="https://synaccess.com/contact" target="_blank" title="Contact Us" rel="noopener noreferrer">sending us a message</a>.</p>

<span>Set IP, toggle outlets, and monitor power consumption on the front panel 1.8" color display.</span>

SynLink PDU - Control Panel Interface

<h2>Respond to unplanned events to protect your electrical power system from blackouts and other unintended consequences. </h2>
<h2>What is Load Shedding?</h2>
<p>Load shedding is a method to remove load from an electrical power system where the system is at risk of outage due to demand strains, unplanned events, or equipment damage. </p>
<p>A number of events can require the use of load shedding, including infrastructure outages, limited on-site diesel generator capacity, increasing levels of demand,  unstable environmental conditions, and others.  </p>
<p>Configure SynLink devices to reduce power demand (shed loads) under the following detectable conditions.</p>
<ul>
<li>Maximum Current Limits for inlet plugs</li>
<li>Minimum Voltage Thresholds</li>
<li>Max and min temperature limits</li>
<li>Max and min relative humidity limits</li>
<li>Power failures with ATS (Auto Transfer Switch) Primary Sources</li>
</ul>
<h2>
<b>Application:<span> </span></b><span style="color: #ff2a00;"><strong>Automatically shut off equipment to ensure longer operational life, and prevent unplanned outages.</strong></span>
</h2>
<p>SynLink Switched Pro+ PDUs are equipped with Panasonic Power Relays on individual outlets. This gives users the ability to reliably shut outlets off <span>programmatically</span>. With these capabilities and a number of sensors, SynLink PDUs can react intelligently. </p>
<p> </p>
<h4>Prerequisites</h4>
<ul>
<li>SynLink Smart PDU</li>
<li>Network Configured/Connected Setup (<a href="https://synaccess.com/quick-start-guide.pdf" target="_blank" rel="noopener noreferrer">Quick Start Guide</a>)</li>
<li>Web Browser with access to SynLink PDU IP Address </li>
</ul>
<h4>Creating Load Shedding Action </h4>
<p>Access to Automation Configurations can be found through PDU Hosted Web Interface via it's IP address. The following page is found at http://IP_ADDRESS/events</p>
<p>Start by creating an Action that turns off equipment on load shedding events.</p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot13_1024x1024.png?v=1632937624" alt=""></p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-50-08_1024x1024.png?v=1632937838" alt=""></p>
<h4>Set Up Load Shedding for Upstream Circuit Breaker Power Capacity Limits</h4>
<p>Surpassing circuit breaker limits results in CB trips, which render circuits inoperable until manual intervention. The following example sets a trigger for "Inlet Max Current Threshold" at 18 amps for a 20 amp circuit breaker.</p>
<p style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot11_1024x1024.png?v=1632936914" alt=""><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-38-07_1024x1024.png?v=1632937136" alt="" style="float: none;"></p>
<p style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/screenshot12_1024x1024.png?v=1632937380" alt=""></p>
<h4 style="text-align: left;"></h4>
<h4 style="text-align: left;"></h4>
<h4 style="text-align: left;">Set Up Load Shedding for Primary Power Source Failure on ATS PDUs</h4>
<p>ATS (Auto Transfer Switch) capable PDUs have two inlets and ensure continuous distribution of electrical power from one of two power sources to it's outlets. Secondary power sources may be from alternate sources such as on-site diesel generators with limited power capacity.</p>
<p>ATS PDUs configured with primary power sources on inlet A, and secondary/alternate power sources on inlet B can notify and automate load shedding on primary power source loss. </p>
<p>Configure load shedding of configured equipment with event type: ATS Switched To Secondary. </p>
<p> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-44-56_1024x1024.png?v=1632937513" alt=""></p>
<p> </p>
<h4>Set Up Load Shedding To Manage Temporary Voltage Drops</h4>
<p><strong></strong>Lower voltage conditions can be problematic for select power supplies. Short duration reduction in RMS voltage can be caused by a short circuit, overload, or starting of electric motors. Voltage dips occur when RMS voltage decreases between 10 and 90 percent of nominal voltage for on half cycle up to a minute. Set up triggers to prevent issues due to voltage drops, and to shut down power hungry equipment.</p>
<p> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-55-55_1024x1024.png?v=1632938167" alt=""></p>
<p> </p>
<p> </p>
<p></p><h4>Set Up Load Shedding for temperature humidity thresholds</h4>
<p>Protect equipment from environmental conditions which might increase risk of equipment damage. Use optional temperature/humidity sensors to detect set limits.</p>
<p>Configure appropriately to take action and load shed when set temperature/humidity limits are reached.</p>
<p> </p>
<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-59-57_1024x1024.png?v=1632938406" alt=""></p>
<p><strong><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2021-09-29_10-58-11_1024x1024.png?v=1632938421" alt=""></strong></p>
<p> </p>
<p> </p>
<p> </p>

<p>Respond to unplanned events to protect your electrical power system from blackouts and other unintended consequences. </p>

Smart Load Shedding

<div><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Laptop_Email_Alert_1024x1024.png?v=1632431581" alt="Email Setup - AutoPing Timeout Alert" style="float: none; display: block; margin-left: auto; margin-right: auto;" width="1024x1024" height="1024x1024"></div>
<h2><span style="color: #ff2a00;">Setup Guide</span></h2>
<p><span style="color: #000000;">Use this guide for configuring Google's Gmail SMTP server on a SynLink PDU. Once configured, your SynLink PDU will be able to send automated email alerts.</span></p>
<p style="padding-left: 30px;">1. Generate an App Password in your Gmail Account<span> </span><a href="https://myaccount.google.com/apppasswords" target="_blank" title="Generate app password" rel="noopener noreferrer">Settings</a>.</p>
<ul>
<ul>
<li>Select App &gt; <em>Mail</em>
</li>
<li>Select Device &gt; <em>Other (Custom name) </em>: SynLink PDU (or any name you want).</li>
<ul>
<li>Save the 16 character password provided by Google. This will be used later when configuring the SynLink PDU.</li>
</ul>
</ul>
</ul>
<div style="padding-left: 30px;">2. Log in to your SynLink PDU's web interface.</div>
<div style="padding-left: 30px;">3. Click on <em>Network &gt; SMTP</em>
</div>
<div style="padding-left: 30px;">4. Follow the instructions under <strong><em>Other setup options</em></strong><span> </span>at this<span> </span><a href="https://support.google.com/a/answer/176600?hl=en#zippy=%2Cuse-the-gmail-smtp-server" target="_blank" title="smtp setup gmail" rel="noopener noreferrer">link</a> to fill out each input field.</div>
<ul>
<ul>
<li>The example below shows a working configuration.</li>
<ul>
<li>Account Username: Your Gmail or Google Workspace email</li>
<li>Account Password: The 16 character App Password generated in Step #1 of this tutorial.</li>
</ul>
</ul>
</ul>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Configure_SMTP_Email_600x600.gif?v=1632430132" alt="configure email smtp on synlink pdu" style="float: none;" width="600x600" height="600x600"></div>
<br>
<ul>
<ul></ul>
</ul>
<div style="padding-left: 30px;">5. Save the settings and test your setup using the <em>Test SMTP Settings</em> Tool to send an email to yourself. You should have received an email in your inbox if the setup was successful.</div>
<div></div>
<div></div>
<div style="padding-left: 30px;"></div>
<div></div>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Send_SMTP_Test_email_600x600.gif?v=1632430162" alt="send test email synlink pdu" width="600x600" height="600x600" style="margin-top: 28px; margin-bottom: 28px; float: none;"></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div>Still having issues? Contact us for help at support@synaccess.com.</div>

<p><span>This guide is a detailed walk-through for configuring Google's Gmail SMTP server on a SynLink PDU. Once configured, your SynLink PDU will be able to send automated email alerts.</span></p>

Email Setup for SynLink PDUs

<h2>Tired of turning things off and back on again?</h2>
<blockquote>
<p><span style="font-size: 15px;">The AutoPing Monitor saves you time and money by detecting the problem and doing it for you.</span></p>
</blockquote>
<p><span style="font-size: 15px;">AutoPing monitors unreliable networking equipment, detects issues with network stability, and (as a bonus feature) can be used for proximity detection of wireless devices. This feature is built-in to all SynLink PDUs.</span></p>
<p>The feature works by sending periodic ping requests to devices on the network. When ping fails, the event is logged and immediate action can be taken like sending an email alert, switching an outlet, power cycling a group of outlets, or sending a custom API call to a 3rd party application.</p>
<p>We've found this feature to be advantageous in the following applications.</p>
<h2><b></b></h2>
<h2>
<b>Application: </b><span style="color: #ff2a00;"><strong>Immediate action when a device on the network becomes unresponsive.</strong></span>
</h2>
<p>As smart devices get smarter, device lock-ups get more common. This is especially true in the IoT connected world we live in today.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/AutoPing_Smart_TV_480x480.gif?v=1632361152" alt="AutoPing - Smart TV Demo" style="margin-right: 28.8px; margin-bottom: 20px; float: left;" width="480x480" height="480x480"></div>
<p>In this example, AutoPing is configured to periodically check on a local device (smart TV) on the network.</p>
<p>The TV is connected to outlet #3 of a SynLink Switched Pro+ PDU. If the smart TV fails to respond to three ping requests from the PDU, the TV's outlet is power cycled and an email is sent to the Network Admin for immediate investigation</p>
<p>The AutoPing monitor continues to send ping requests in the background after the outlet has been power cycled expecting the TV to come back online. When the TV boots up and responds again, the AutoPing status is set back to an OK state and the cycle repeats. </p>
<p> </p>
<p> </p>
<blockquote>
<p>Pro Tip #1: The Test Ping Diagnostic Tool can be used for remote debugging.</p>
<p>Especially useful when the PDU is the only device accessible on a remote network.</p>
</blockquote>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Test_Ping_Diagnostic_Tool_480x480.gif?v=1632357698" alt="Test Ping Diagnostic Tool - Live demo" style="margin-right: 28.8px; float: none;" width="480x480" height="480x480"></div>
<p> </p>
<h2><b>Application: <span style="color: #ff2a00;">Watchdog for external network access (e.g., the Internet).</span></b></h2>
<p>Pinging the gateway (router) to an external network is not always enough to detect a problem. Autoping can be set up to ping multiple IP addresses simultaneously.</p>
<p>An example where this might be useful is with the following network topology:</p>
<blockquote>
<p>SynLink PDU &lt;--&gt; Managed Switch &lt;--&gt; Router Gateway &lt;--&gt; The Internet</p>
</blockquote>
<p>In some failure modes, the router and switch may still respond to ping while in a locked-up state. </p>
<p>Solution: set up AutoPing to monitor the IP addresses of the managed switch, router, AND a device on an external network (Internet).</p>
<p>In this example, we chose to ping Google servers on the external network. It is assumed that something went wrong on the internal network if the AutoPing status on google.com becomes unreachable. The PDU attempts recovery by power cycling all networking equipment.</p>
<blockquote>
<p>Pro Tip #2: This method is dependent on Google's servers staying up so choose your external ping device carefully.</p>
</blockquote>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/autoping_three_ip_addresses_external_google_unreachable_600x600.png?v=1632414642" alt="AutoPing external IP - google unreachable" width="600x600" height="600x600" style="float: none;"></div>
<p> </p>
<p>When the problem was detected, the <em>Networking Equipment</em> outlet group was power cycled using the Outlet Grouping feature that's standard on all SynLink Switched PDUs. The group includes the router's outlet and the managed switch outlet. Outlet groups can be easily created using the SynLink web interface as shown below:</p>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Creating_Outlet_Groups_600x600.gif?v=1632379228" alt="Demo creating outlet groups" style="margin-right: 28.8px; float: none;" width="600x600" height="600x600"></div>
<p> </p>
<h2><b>Bonus Application: *<span color="#ff2a00" style="color: #ff2a00;">Detect physical proximity of a WIFI connected phone.</span></b></h2>
<p><b></b>Automate turning on your office desk lamp and heater when you get to work and turning it off when you leave. Shout out our engineers for coming up with this one.</p>
<p>This is achieved by configuring AutoPing to check on your WIFI connected phone to detect when you have entered or left a physical location. When the phone makes a connection to WIFI (i.e. when you enter your office building), the PDU detect this with a successful ping response. When the phone disconnects from WIFI (i.e. when you leave the office), the PDU detects with a ping timeout.</p>
<p style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/AutoPing_Phone_Wifi_Proximity_Detection_480x480.png?v=1632420618" alt="AutoPing Proximity Detection Setup"></p>
<p>*The detection feature is available on SynLink firmware v2.5.27 or newer.</p>
<blockquote>
<p>Pro Tip #3: Make sure to set your phone to a static IP or assign a dhcp reservation on your router.</p>
</blockquote>
<h2><span style="color: #ff2a00;"></span></h2>
<h2><span style="color: #ff2a00;">Setup Guide</span></h2>
<div style="padding-left: 30px;"><strong>1. Log in to the SynLink PDU web interface.</strong></div>
<ol></ol>
<ul>
<ul>
<li>Default Username: admin</li>
<li>Default Password: admin</li>
</ul>
</ul>
<div style="padding-left: 30px;"><strong>2. Create an Action</strong></div>
<div style="padding-left: 60px;">Click on <em>Automation</em> tab &gt; <em>Create New Action</em>
</div>
<div style="padding-left: 60px;"><em><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Create_Action_-_Power_Cycle_Router_480x480.gif?v=1632423124" alt="Create Action - Power cycle router"></em></div>
<ul>
<ul>
<li><strong>Available <em>Actions</em> for AutoPing Timeouts:</strong></li>
<ul>
<li>Send email notifications (email setup guide: Link).</li>
<li>Send a text message (for embedded 4G LTE PDUs only).</li>
<li>Change the state of an outlet (ON&gt;OFF or OFF&gt;ON).</li>
<li>Power cycle an outlet (ON&gt;OFF&gt;ON or OFF&gt;ON&gt;OFF)</li>
<li>Change the state of a group of outlets.</li>
<li>Power cycle a group of outlets.</li>
<li>Send a network call to a custom server (HTTP post request).</li>
<li>Send SNMP Trap notification.</li>
<li>More <em>Actions</em><span> </span>coming soon!</li>
</ul>
</ul>
</ul>
<div style="padding-left: 30px;"><strong>3. Create the Event</strong></div>
<div style="padding-left: 60px;">Click on <em>Create New Action &gt; </em>Event Type:<em> AutoPing Timeout &gt; </em>Enter<em> IP Address to Ping &gt;</em> Enter <em># Fails Before Action</em> &gt; Select <em></em>Action in Step #2 &gt; Click <em>Save</em>
</div>
<div style="text-align: start; padding-left: 60px;"><em><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Create_Event_-_AutoPing_Router_600x600.gif?v=1632423607" alt="Creating Event - Autoping Router Timeout" width="600x600" height="600x600" style="float: none;"></em></div>
<div style="padding-left: 30px;">
<ol></ol>
</div>
<p> </p>
<p>You will be redirected to the<span> </span><i>Automation</i><span> </span>overview page and should see the newly configured AutoPing event.</p>
<p>Status =<span> </span><em><strong><span style="color: #78cc23;">OK</span></strong><span> </span></em>means the device is actively responding to ping requests. If AutoPing Timeout occurs status will display <em><strong><span style="color: #ff2a00;">Unreachable</span></strong>.</em></p>
<blockquote>
<p>Pro Tip #4: Multiple actions can be set to the same event. For example, when ping fails, you can email yourself AND power cycle an outlet AND make an HTTP post request to a custom application.</p>
</blockquote>
<blockquote>
<p>Pro Tip #5: Check the event log to see a time-stamped history of events that were triggered and test your setup.</p>
</blockquote>
<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Event_Log_screenshot_600x600.png?v=1632425857" alt="event log screenshot" style="margin-right: 29.3px; float: none;" width="600x600" height="600x600"></div>
<p> </p>
<p> </p>
<p><a href="https://synaccess.com/products/sp1001a" title="SynLink Switched Pro+ 1U PDU">Learn more</a> about the SynLink Switched Pro+ PDU or click <a href="https://synaccess.com/how-to-buy" title="Contact us - request a quote - how to buy">here</a> to contact us and request a quote.</p>
<p>Liked this article?</p>
<p><a href="https://synaccess.com/signup" title="Subscribe for Synaccess Blogs">Subscribe</a> to get notified on our next post featuring the new Heartbeat Watchdog feature. It's like AutoPing, but better.</p>

Tired of turning things off and back on again? The AutoPing Monitor saves you time and money by detecting the problem and doing it for you.

AutoPing - Device and Network Monitor

<div style="text-align: center;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_from_2022-03-27_12-07-25.png?v=1648408061" alt=""></div>
<h2>Overview</h2>
<p>Access to critical equipment deployed in remote locations such as Radio and Cellular towers are typically restricted and unfeasible requiring extensive time and resources.</p>
<p>In a recent application, Kennedy Space Center Amateur Radio Club (N1KSC) deployed Synaccess LTE-enabled PDU to remotely power and manage their Radio Equipment atop of the 500-foot Vehicle Assembly Building (VAB).</p>
<p><a href="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/KSC_Case_Study_V2.pdf?v=1648406463" target="_blank" rel="noopener noreferrer">View Case Study</a></p>

Case Studies

<span>In a recent application, Kennedy Space Center Amateur Radio Club (N1KSC) deployed Synaccess LTE-enabled PDU to remotely power and manage their Radio Equipment atop of the 500-foot Vehicle Assembly Building (VAB).</span>

Kennedy Space Center Vehicle Assembly Building

<p><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/12312312312_480x480.jpg?v=1630691820" width="100%" alt=""></p>
<p> </p>
<p><b>SynLink PDUs Predict Failures</b></p>
<p>A great smart PDU must have two fundamental characteristics.</p>
<ol>
<li>Reliable power distribution.</li>
<li>Reliable network connection.</li>
</ol>
<p>Power loss and unplanned service calls should never be the PDU's fault. Luckily for you, we have taken the time to consider the most common PDU failure modes. <br><br>Predictive Failure Analysis is the process of measuring and analyzing system characteristics to predict failures before they occur.</p>
<p>We have applied this concept to our new SynLink series PDUs from the start of the design process. SynLink PDUs have built-in self-monitoring features to alert you before issues arise. We believe this makes SynLink the best smart PDU on the market.<br><br>Let us explain… </p>
<h4><strong>Relay Health Monitor</strong></h4>
<p>Smart switched PDUs use mechanical power relays to control power at the outlets. There's no argument that relays are an additional point of failure in the power distribution path and some system admins opt out of the benefits for this reason alone. We believe we have a solution.<br><br>Our engineers at Synaccess have developed an industry-first Relay Health Monitor through collaboration with the Panasonic Relay Engineering team. The Panasonic Industrial team brings their power relay expertise and a deep understanding of relay failure modes to the table. They helped to inform our proprietary hardware and firmware designs for all SynLink Switched PDUs.<br><br>The Relay Health Monitor autonomously collects sensor data on all built-in relays. Threshold limits are set on this data to accurately assess the health of the relay and predict issues before they occur. This data can be obtained directly on the PDU's web interface in the 'Diagnostics' tab.<br><br>Additionally, built-in voltage sensors are included behind each relay in the PDU. If a relay does fail, the voltage sensors will detect and immediately raise a flag. <br><br>The Relay Health Monitor is a standard feature for all SynLink Switched PDUs.</p>
<h4><strong>Network Watchdog</strong></h4>
<p>The Network Watchdog works in the background to periodically monitor all network interfaces for activity. Activity signals a properly working PDU. If a long period of inactivity is detected, the network interface is forced to restart in an attempt to recover.</p>
<p>Two network interfaces are monitored out of the box. The ethernet network interface and the fault-tolerant Controller Area Network (CAN) interface used for internal sensor communications.<br><br>The Network Watchdog is a standard feature for all SynLink PDUs.</p>
<h4><strong>Circuit Breaker Trip Detection</strong></h4>
<p>SynLink's built-in Event-Action tool can be configured to send alerts or switch outlets when power consumption is near the threshold of a branch circuit breaker. <br><br>Immediate alerts can be sent via email, SNMP trap, or custom webhooks when a circuit breaker trips. When set up properly, these automated notifications can significantly reduce your MTTR (Mean Time to Repair).</p>
<h4><strong>Power Supply Fail-Over Detection</strong></h4>
<p>One of the most common issues that cause a circuit breaker to trip is when a server power supply fails. On a server with dual redundant power supplies, the drop in load of the failing power supply will be taken over by the other power supply. SynLink PDUs utilize current metering at each outlet to detect this scenario. The Event-Action tool can be configured to quickly detect power supply failures and quickly alert you of the issue via email, SNMP trap notifications, or custom webhooks.</p>
<p> </p>
<p>Request a demo or ask for a quote at sales@synaccess.com.</p>

Blog

<p>Predictive Failure Analysis (FA) is the process of measuring and analyzing system characteristics to predict failures before they occur.</p>
<p>Discover how Predictive FA in SynLink PDUs can give you peace of mind and help you sleep at night.</p>

Predictive Failure Analysis in Smart PDUs

<h3>Adding Power Redundancy to Legacy Single Corded IT Equipment</h3>
<p> </p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/vilmar-simion-ffREEWWVimk-unsplash_1_3efeae71-70e6-4f4a-b29c-55ee691995c8_600x600.jpg?v=1603994068" alt="legacy equipment"></div>
<p> </p>
<p><em>Summary</em><em><br></em>Single Corded IT equipment is provided power redundancy by connecting to an Automatic Transfer Switch (ATS) Power Distribution Unit which accepts two inputs from redundant power sources. The ATS PDU maintains power to connected equipment by switching to an active backup power source if the primary source goes down.</p>
<p>Many rackmount servers, switches and other IT rackmount equipment have redundant power supplies (dual-corded). Equipment with one power supply (single-corded) are susceptible to power failures. The single-corded equipment is not utilizing power source redundancy. </p>
<p>SynLink ATS (Automatic Transfer Switch) PDUs is the solution. Two power sources can be fed as inputs into the ATS PDU. Single-corded equipment is connected to the ATS PDU output receptacles. Failure of the primary power source results in the ATS PDU automatically detecting and switching to the secondary power source without a noticeable interruption at the outlets. Redundant power sources can now be utilized for IT equipment with single power supplies.</p>
<p> <img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2020-10-29_101630_1024x1024.png?v=1603991824" alt="ATS Inlet Settings Screenshot">*<em>ATS Inlet Status Page</em></p>
<p> </p>
<p><a href="/signup?tag=category%3Aats&amp;title=ATS%20PDU%20Arrival%20Notice" title="ATS PDU Arrival Notice Sign-up">Learn more</a> about ATS PDUs.</p>

<span>Many rackmount servers, switches and other IT equipment have multiple redundant power supplies (dual-corded). For facilities with two redundant power sources, equipment with one power supply (single-corded) are susceptible to primary power source failure. The single corded equipment is not utilizing power source redundancy.</span>

Power Redundancy for Legacy Equipment

<h3>Automating IoT Device Recovery From Application Level Networking Failures.</h3>
<p><em>Summary<br></em>An IoT device that fails to respond to pings is restarted by a SynLink Power Distribution Unit (PDU), which monitors the ping statuses. Failures are logged, and logging information is used to identify the cause of the issue.</p>
<p><br>The IoT network-enabled device that reports sensor data crashes repeatedly from an unknown issue. It also does not have a remote management card or remote access card to manage and recover the device. The setup requires manual intervention to restart and recover, costing time and money. </p>
<p><em><br></em>With a SynLink Power Distribution Unit, the built-in <em><strong>AutoPing</strong></em> feature is configured to monitor the ping status of the troubled device. Using the IoT device's LAN IPV4 address, the PDU pings the address at a periodic rate and triggers multiple user-defined actions when there is no response.</p>
<div style="text-align: left;"><img src="https://cdn.shopify.com/s/files/1/0496/7835/2545/files/Screenshot_2020-10-29_093821_1024x1024.png?v=1603989542" alt="AutoPing Setup Screenshot" style="float: none;" width="1024x1024" height="1024x1024"></div>
<p><em>*Screenshot of the AutoPing Reboot configuration page on the SynLInk Web Interface</em></p>
<p> </p>
<p>Once triggered, an SNMP trap notification is sent to the monitoring software running on the local area network, an email is sent to the lead technician, and the outlet that the IoT device is connected to automatically power cycles to restart the device.</p>
<p>All losses of ping are subsequently logged and characterized. Failure patterns are found, and the source of the error is identified.</p>
<p> </p>
<p><a href="http://synaccess.com/synlink-smart-pdus" title="Synlink smart pdu page">Learn More</a> about SynLink Smart PDU Technology</p>

<span>The IoT network enabled device </span><span>which </span><span>reports sensor data </span><span>crashes repeatedly from an unknown issue. It also does not have a remote management card or remote access card to manage and recover the device. The set up requires manual intervention to restart and recover, costing time and money.</span>

SP-4008DIE-08

0U Single Phase Monitored Dual

Features

Specifications

Package Includes