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Single-Pair Ethernet (SPE) PHYs and Switches

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What Is Single Pair Ethernet?

Single Pair Ethernet (SPE) is an Ethernet network implementation that uses a unique physical layer (PHY) transceiver over a single pair of wires. SPE reduces system cost, weight and wiring complexity when compared to traditional Ethernet multi-pair CAT5 cabling. OSI network layers 2 to 7 remain the same across all the Ethernet physical layer types, eliminating additional software modification to implement SPE.

SPE enables you to take advantage of an all-Ethernet architecture while tailoring the system to the unique needs of your market segments. SPE, also referred to as “T1”, can support multiple bandwidths and distances and the IEEE® defines SPE in the 802.3 standards group.

Standard

Bandwidth and Protocol

Description

IEEE® 802.3cg
  • 10 Mbps connection over a single pair of conductors
  • Short reach (25m), multi-drop bus line or point-to-point connection
  • Long reach (1 km), point-to-point connection

IEEE 802.3bw
  • 100BASE-T1
  • 100 Mbps over single twisted pair cable
  • Up to at least 15m

IEEE 802.3bp
  • 1000BASE-T1
  • 1000 Mbps over single twisted pair cable
  • Type A link segment up to at least 15m
  • Optional Type B segment up to at least 40m

IEEE 802.3ch
  • NGBASE-T1
  • 2.5 Gbps, 5 Gbps, 10 Gbps over single twisted pair shielded cable
  • Up to at least 15m

Single Pair Ethernet Applications

Industrial Control and Automation Single-Pair Ethernet (SPE) Solution

Industrial Control and Automation

Factory control systems can optimize bandwidth, cable, length, reliability and cost while utilizing an all-Ethernet network.

Building Automation Single-Pair Ethernet (SPE) Solution

Building Automation

Building control systems support needed bandwidth while taking advantage of long cable length capability.  

Data Centers Single-Pair Ethernet (SPE) Solution

Data Centers

Data centers can maintain an all-Ethernet control network while optimizing infrastructure connections.  

Automotive Single-Pair Ethernet (SPE) Solution

Automotive

You can significantly reduce automotive in-vehicle networking cable cost, weight and complexities with SPE.

Industrial Robotics Single-Pair Ethernet (SPE) Solution

Industrial Robotics

Robotics benefit from smaller cable size, enabling routing through tighter joints to connect multiple sensors in the extremities. 

10BASE-T1S Solution

10BASE-T1S

10BASE-T1S reduces total system cost by using a single pair of wires and a multidrop bus architecture. 10BASE-T1S also increases system scalability since several nodes can operate on the same bus line with high data throughput.

SPE Products

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To learn more about SPE technology, visit the resources and websites below.

SPE Alliance
Ethernet Alliance SPE Sub-Committee