Posted: Tue May 26, 2009 2:54 pm Post subject: [asterisk-users] Maximum cable length for analog phone from
On Tue, 26 May 2009, randulo wrote:
Quote:
On Tue, May 26, 2009 at 5:31 PM, Danny Nicholas <danny@debsinc.com> wrote:
> I run my analog telco over cat5, but that's in-house and definitely not 3km. That sounds really far for current loop stuff.
I was doing that too. I asked this same question a few years ago and
the answer was 100-200 meters. This is just a quick rule of thumb, but
it seems about right. 3km, I doubt that would work, but it depends, as
someone said, totally depending on ohm's law :)
Egad, this is just not true. 100 - 200 meters is for ETHERNET, not analog
voice. I have many runs over 1K meters that work just fine, and several
that are close to 3Km that honestly do NOT. Think about high rise
buildings - many strung with CAT3 cable for voice from the basement.
Many of those runs may be well over 1000m.
A better question is why is he stuck using a 3Km leased circuit? Like
another poster said "there must be a better way".
j
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