Posted: Tue May 26, 2009 3:12 pm Post subject: [asterisk-users] Maximum cable length for analog phone from
Sigh, lets repeal Ohm's law.
;-)
In practice the controlling rules are:
Murphy's Law: "If anything can go wrong it will."
O'Toole's corollary to Murphy's law: "And, it will produce the worst
possible results."
Cary Fitch
-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Tzafrir Cohen
Sent: Tuesday, May 26, 2009 10:56 AM
To: asterisk-users@lists.digium.com
Subject: Re: [asterisk-users] Maximum cable length for analog phone from
FXSport
On Tue, May 26, 2009 at 05:39:46PM +0200, 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.
Quote:
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 :)
If it were to depend solely on Ohm's law, than 3km would be marginal but
probably within reach. Not exactly sure what other factors are there to
count.
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