802.3bu - Power Over Data Lines (PoDL)

October 25, 2018 at 8:00 AM

 

In the realm of IEEE standards, 802.3 has some pretty good tricks up its sleeve. There is 802.3bt which expanded the capabilities of Power over Ethernet (PoE), 802.3bv brought you Power over Plastic Optical Fiber (POF) and 802.3bz which delivers 2.5 Gbps and 5 Gbps speeds data over copper. Now, the IEEE has unveiled 802.3bu – a standard for Power over Data Lines (PoDL).

 

Initially, single-pair Ethernet was created to help meet a demand in the automotive industry for Ethernet connectivity in vehicles. 802.3bu defines the specifications and standards for delivering power over single twisted-pair to connect Data Terminal Equipment (DTE) with IEEE 803.2 interfaces. This standard also extends the wattage range to up to 60 Watts of power, which is more power over a single cable than the PoE standards 802.3af and 803.2bt. With this PoDL standard, the most recent physical layers of single twisted-pair Ethernet are supported, including 100BASE-T1 and 1000BASE-T1, while using unshielded twisted-pair cables. This results in a lower cost and lighter weight solution, which is always good news. It is targeted for use in automotive, industrial automation, air and rail transportation, and other applications that use 100BASE-T1, 1000BASE-T1 or any single-pair data or non-data entity protocol. The IEEE 802.3bu standard also opens itself up for the possibility of additional applications across a variety of industries in need of solutions to adapt to the Internet of Things (IoT) expansion.

 

The goal of the 802.3bu standard is to specify a power distribution technique for use over a single twisted-pair cable that will allow for operation if data is not present. This standard is designed to deliver power that supports multiple voltages and classes of power at each voltage level. Plus, it has the capability of fault protection and detection to identify device signatures and communicate directly with devices to ensure precise and safe power delivery. PoDL supports fast startup operation with predetermined voltage configurations and the option of operation with run-time voltage configuration. It ensures compatibility with the IEEE 802.3bp standard. However, it is not compatible with Ethernet applications that operate over 2 or 4-pairs of twisted-pair cable.

 

With the introduction of 802.3bu PoDL, not only is the wattage delivery increased and intuitive, the possibilities of power delivery are increased as well.

 

Next Generation PoE - What You Need to Know

August 23, 2018 at 8:00 AM

 
What’s better than Power over Ethernet? More Power over Ethernet (PoE), of course – and that is exactly what PoE++ is delivering. PoE++ expands upon the traditional PoE benefits of delivering data and power over a single Ethernet cable, it increases power capabilities and extends PoE’s reach into new industries and applications. Here, we’ll tell you exactly what gives PoE++ those two extras plus signs.
 
First, let’s look at a numbers comparison. The first ratified PoE standard 802.3af supports 15.44 watts of power, but power dissipation usually lowers that number to a reliable 12.95 watts. Then PoE+ was introduced and bolstered power to 30.8 watts with the 802.3at standard, though power dissipation usually takes its toll and lowers power to 25.5 watts. PoE++ (the 802.3bt standard) will be capable of supplying more than 3 times the power of PoE+ with up to 100 watts (Type 4) of DC power and the ability to support 10 Gbps connections.
 
Traditionally, PoE has been used in networking applications. With PoE++, the technology’s reach is extended to include healthcare, point of sale, financial and surveillance industry applications. PoE++ utilizes all four twisted pairs of an Ethernet cable for optimal power transmission. It consists of Mode A and Mode B, and combines them to reach higher voltage levels. Mode A is also referred to as Type A, Type 3 or 4-pair PoE. It is specified for 60W, 50W reliable, and is able to support technology such as access controls, point of sale readers, IP cameras and nurse call devices. Mode B is also known as Type B, Type 4 or higher-power PoE. It is designed for 100 watts of power, 80 watts after power dissipation, and increases the capabilities to also include support of videoconferencing systems, laptops, desktops and televisions.
 
PoE++ is slated to bring more power, more conveniently to more devices than ever before. With all of the speed, convenience and capabilities that this new technology offers, it’s no wonder that PoE++ earned those extra plus marks.

Case Study: Lineage Logistics

May 10, 2018 at 8:00 AM

 

As the second largest cold storage thrid-party provider in the US, Lineage Logistics provides cold storage solutions for leading grocery, food and retail  companies.

 

During a wireless network roll-out in their warehouses, Lineage Logistics needed to add multiple access points inside refrigeration units with temperatures as low as -40 degrees. The company’s engineers had designed a wireless access point that fulfilled the needs of the project, but wasn’t able to function unprotected in the cold temperatures.

 

Lineage Logistics began searching for an enclosure that would protect their access point, offer Power over Ethernet (PoE) over a single cable and meet cost requirements.

 

After rejecting a competitor’s offering, as it didn’t fully meet the requirements, Lineage Logistics came to L-com for help. Our team was able to develop a comprehensive solution that met all their needs. We created a custom NEMA enclosure that could house the access point and provide plently of room if adjustments were needed. We were also able to save Lineage Logistics time and money on installation by mounting the access points in the enclosures and providing all required cabling and antennas.

  

L-com was able to not only meet, but surpass this client’s expectations with the perfect solution to their problem.

 

To read the full case study, click here.

 

Read All About It: PoE White Paper

August 3, 2017 at 8:00 AM

 

Power over Ethernet (PoE) is a revolutionary technique that provides both power and data in one Ethernet cable. PoE equipment eliminates the need to run power to remote network devices, which allows for greater flexibility and is ideal for remote locations where traditional power sources are not available. PoE can save time and money and is becoming more frequently used in wired and wireless connectivity applications with network devices such as wireless access points, switches and IP cameras.

 

Our white paper takes a deeper look at PoE, its history and how it is used in today’s telecommunications networks. Topics covered include:

 

History of PoE

  • -          How the IEEE was called upon to create the 802.3af standard to help the growth of the PoE market with a unified standard              to rely on
  • -          Power Sourcing Equipment (PSE)
  • -          Powered Devices (PD)

 

PoE Details and Variations

  • -          Mode A vs. Mode B
  • -          Mode A: Combining power via Phantom Powering
  • -          Mode B: Power over Ethernet spare pairs

 

Click here to read our PoE white paper.

 

All of our free white papers are available from our website by clicking here.

 

Cat6a - Taking Copper to the Next Level

July 28, 2016 at 8:00 AM

 

Copper cable has many advantages including flexibility, cost savings, and Power over Ethernet support– and now it can add lightning fast speeds to its list of attributes. Until recently, fiber cabling was the only way to achieve 10 Gigabit Ethernet data rates, but now Cat6a is taking copper to the next level with super-speed 10Gbps transmissions.

 

Cat6a cables can reach 10 Gigabit Ethernet speeds at frequencies of up to 500 MHz over low-cost copper cable. That makes Cat6a ten times faster than Cat6 and cheaper than fiber cabling. Cat6a is a high performance, cost-effective solution for moving large volumes of voice, video and data traffic over a network.  Its accelerated performance is perfect for use in data centers and storage area networks (SAN) that sometimes need to move terabits of data.

 

In addition to being fast, Cat6a supports longer distances than Cat6 with capabilities of up to 100 meters for 10GBASE-T. Cat6a cables are also backward-compatible with existing network infrastructure products, making for an easier migration path. Additionally, Cat6a cables are shielded which enhances overall performance and makes them more resistant to noise, interference and alien crosstalk.

 

With off the chart performance characteristics, Cat6a cables, couplers and other infrastructure products can take your network to the next level.

 

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