What is the EFM standard about?

The EFM standard specifies the following new Ethernet transceivers (PHYs) that can be used for subscriber access networks. They can be used for high-speed Internet access in the same way ADSL and cable modems are being used today. Their low cost and high bandwidth make them extremely well suited for additional services such as voice-over-IP, TV-over-IP and video-on-demand.

2BASE-TL
supports bitrates of up to 5.696 Mb/s over voice-grade copper (telephone wires) at distances in the order of 2.7 km (based on SHDSL)
10PASS-TS
supports bitrates of up to 100 Mb/s over voice-grade copper (telephone wires) at distances in the order of 750 m (based on VDSL)
100BASE-LX10
offers 100 Mb/s over two strands of single-mode fiber at a distance of up to 10 km
100BASE-BX10
offers 100 Mb/s over one strand of single-mode fiber at a distance of up to 10 km
1000BASE-LX10
offers 1 Gb/s over two strands of single-mode fiber at a distance of up to 10 km
1000BASE-BX10
offers 1 Gb/s over one strand of single-mode fiber at a distance of up to 10 km
1000BASE-PX10
offers 1 Gb/s to be shared between up to 16 users of an Ethernet passive optical network (EPON) at a distance of up to 10 km
1000BASE-PX20
offers 1 Gb/s to be shared between up to 16 users of an Ethernet passive optical network (EPON) at a distance of up to 20 km
In addition, the EFM standard specifies an “Operations, Administration, and Maintenance” protocol for Ethernet, and management parameters for all the new PHYs and protocols.