TELECOM Digest OnLine - Sorted: Re: How Long Can a Telephone Extension Cord Be?


Re: How Long Can a Telephone Extension Cord Be?


Phil McKerracher (phil@mckerracher.org)
Mon, 15 Aug 2005 21:29:07 GMT

John Levine <johnl@iecc.com> wrote in message
news:telecom24.366.5@telecom-digest.org:

> I think the limit is about 18,000 feet. Then you might have trouble
> carrying DSL over it ...

Correct, but that's the approximate limit for the total length from
the switch to the telephone. Beyond that, the signal is typically
attenuated too much, mainly by cable resistance, and gets buried in
noise.

As someone else has pointed out, you need decent cable, routed clear
of sources of interference (such as power cables and cordless phones),
otherwise interference will be a bigger problem than loss of signal.

Phil McKerracher
www.mckerracher.org

Post Followup Article Use your browser's quoting feature to quote article into reply
Go to Next message: John Levine: "Re: Start-Up Slashes Cost of International wireless"
Go to Previous message: Joseph: "Re: Start-Up Slashes Cost of International wireless"
May be in reply to: wylbur37: "How Long Can a Telephone Extension Cord Be?"
Next in thread: Robert Bonomi: "Re: How Long Can a Telephone Extension Cord Be?"
TELECOM Digest: Home Page