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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

ADSL over CAT-5e?

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Old March 9th 05, 02:06 PM posted to comp.dcom.cabling,uk.telecom.broadband
Petri Krohn
external usenet poster
Posts: 11
Default ADSL over CAT-5e?

"John Carlyle-Clarke" kirjoitti viestissä
. 1.69...

I'm in the UK and I have an ADSL-enabled BT line coming in next to the
patch panel for a Cat 5e cabled office. Can I extend the ASDL to
another part of the office over the Cat 5?

Doesn't anybody in the UK use structural cabling for telephony?

Structural cabling = Using the same type of Cat-5 cable + RJ-45 sockets for
telephone, Ethernet, whatever...

I suppose I'd need by the patch panel a BT plug - RJ45 conversion ..
not sure how I would achieve this? Then at the other end, an RJ45 -
BT socket conversion, which is easy enough.

The telephone signal would go on the blue/white pair on pins 4 and 5.
UK phones seem to use an extra wire for the ringer. Is this still in use in
modern phones? Which pin/wire would this go on?

Then I'd plug in the filter and the modem.

You only use a (low-pass) filter to block the ADSL high frequencies from
reaching the POTS phones. For connecting a modem you do not need a filter

Would this work?

Yes. Cat-5e cable is just a better version of twisted-pair telephone cable.
(The really interesting question is whether and when you can run 100 Mbps
Ethernet over normal phone wires.)

(Copy to news:uk.telecom.broadband, follow-ups to news:comp.dcom.cabling.)

Petri Krohn
Helsinki Neighborhood Networking Association
HelsinkiOpen -- http://www.helsinkiopen.net


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