Link-layer technologies

Ethernet

• IEEE 802.3 working group
• 100VG AnyLAN (obsolete)
• IEEE 802.3 committee on DTE power via MDI, e.g., PowerDsine or SEI Power

• Quad port Ethernet NICs:
  • IBM QuadPeermaster (?)
  • Znyx
  • Adaptec (10 and 100 Mb/s)
• Email note about Ethernet performance problems
• Light propagation in fibers
• Gigabit Ethernet, which uses the FiberChannel physical layer on multimode (500 m) or single mode (2 km) fiber; support for 25-50 m of UTP-5 is planned. Alteon technical brief.
• PhoneLAN
• Tut Systems: 1.3 Mb/s over category-2 home telephone wiring; 5.5MHz and 9.5 MHz.
• Epigram: 10 Mb/s over home phone wiring: POTS occupies 20 Hz to 3.4 kHz in the U.S. (slightly higher internationally), xDSL services, like Universal ADSL, occupy the frequency range from 25 kHz to 1.1 MHz, Phoneline networking can operate in a frequency range above 2 MHz.
• Intellispace: managed Ethernet