Re: Cable length between filter and modem

Chris Watts wrote:
> What is the maximum, sensible, cable length that can be used between an ADSL
> filter and an ADSL modem? I am thinking 3m to 5m. Will flat cable suffice
> for this length or do I need twisted pair or even Cat5?

As the filter does nothing at all for the ADSL signal, the distance is
irrelevant, provided that the overall loss on the line (from modem to DSLAM, via
your wiring, socket, drop wire, pole, u/g, cabinet, u/g, and exchange rack
wiring) is small enough to allow a workable signal through.

Twisted pair cable will pick up less environmental noise than flat extension
cable. Whether this is sufficient to push your noise levels above the point
where they mess with your ADSL signalling is subject to things in your
environment (i.e. what the cable runs past, sunspot activity, etc.)

Personally, I'd use CAT5 premises wiring (i.e. solid core) to wire in a
secondary telephone socket where the modem is situated. Stick a filter in the
front of the NTE5 master, and if you don't need a telephone at the modem's
location (and therefore don't need a filter there) convert the RJ11-RJ11 cable
to a far shorter (for neatness) RJ11-BT431.
(But then I wired the whole house with CAT5e UTP and STP some time ago; I shove
composite video and audio around on the STP, ethernet and telephony around on
UTP, your requirements undoubtedly vary)
.

Relevant Pages

  • Re: Impact of hardware with bad SNR & Attenuation
    ... > out which things the filter will mess up). ... by the bell wire of the extensions feeding back & mixing with the ADSL ... > Reading between the lines here, a good modem is better at dealing ... attempting to negotiate a connection with the exchange).. ...
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  • Re: Noisy Phone line when Broadband modem switched on.
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  • Re: 9-11 video: best i have seen yet
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  • Re: Windows XP Fax
    ... I have a line from ADSL Modem going into splitter ... You CANNOT fax using a DSL modem. ...
    (microsoft.public.windowsxp.print_fax)
  • Re: Hum on phone line
    ... a month ago, but as the wiring was already in place from years ago, ... Is your phone connected through a filter? ... I had my modem on before ADSL was live and there was noise on the phone ...
    (uk.telecom.broadband)