In an earlier contribution to this discussion,
jim_in_sussex wrote:


requirements a

A) to take the unfiltered AB signal downstairs (about 25m) (all
speech telephone cables being filtered off at the entry point) -
essential

B) Take a new speech telephone cable to near the router from the
filter point. - useful only

C). Bring back part way (to 1st floor) a CAT5 cable to carry ethernet
to/from the router. - high up in the wants.


For A) is CAT5 really needed? Won't ordinary telephone cable do?
After all the signal travels unfiltered 3/4mile or more from the
exchange on normal BT cable.

Ordinary phone cable is fine. If you use 3-pair cable, you can carry voice
and digital in a single cable.

For B) ordinary telephone cable will do, but if that is OK for A) & I
try to use the same (6 way) cable as for A then is there a risk of
cross-talk?

No it will be fine. As far as cable colours go, use the blue pair for voice
(2+5) one of the orange wires for ringer (3) and the green pair for ADSL.

For C) clearly a dedicated CAT5 is what you're recommending - will do

I'm not sure how many computers will have a wired connection to the router -
but you need a separate CAT5 cable for each one - unless you're putting an
additional hub somewhere. It doesn't daisy-chain like thin co-ax ethernet!

There's something I don't understand here - why is CAT5 the standard
cable when apparently only half the cable is used (4 wires out of 8)?

Also what are the standard pairings on CAT5 for sthe standard PC
router ethernet signals?

See http://www.aptcommunications.com/ncode.htm It's best to use RJ45 sockets
with solid CAT5 between them, and short flexible patch leads each end.
--
Cheers,
Set Square
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