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RE: Spliting a cat5 cable? (Tivo Vs Cat5)


  • To: <ukha_d@xxxxxxx>
  • Subject: RE: Spliting a cat5 cable? (Tivo Vs Cat5)
  • From: "Ian Lowe" <ian@xxxxxxx>
  • Date: Thu, 7 Nov 2002 20:43:56 -0000
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@xxxxxxx

>> 1) do these things really work (for 100megabit)?
>
>'fraid not. You can get 10Mbps as the spec for this requires only two wire
>pairs, but the 100Mbps spec requires all four pairs.

They do actually.

The four pair version of 100Mbps Ethernet fell by the wayside back when Fast
Ethernet
products were first shipping. 100 base TX as in use today uses only two
pairs:

pins 1,2 (orange pair in 568B)
and 3,6 (blue pair in 568B)

I have used line doublers on fast ethernet, and also (with a custom cable)
to feed ISDN and Ethernet down the same CAT-5 cable

Ian.



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