[Asterisk-Dev] FXO - Question

[Steven Critchfield]

On Tue, 2004-09-28 at 10:23, steve szmidt wrote:
> On Tuesday 28 September 2004 01:35 am, Benjamin on Asterisk Mailing Lists 
> wrote:
> > On Mon, 27 Sep 2004 14:24:09 -0300, Angel Diaz <adiaz at sinergis.com> wrote:
> > >     Does somebody know how many meters of cable is supported between
> > > Asterisk Digium-FXO cards and the telephone ?
> >
> > The answer is that Digium-FXO cards DO NOT support telephones at all,
> > nor do any other vendor's FXO cards. FXO cards plug into a phone line
> > from your local telephone company.
> >
> > rgds
> > benjk
> 
> I'm sure he's only confused about FXO and FXS. Since using twisted pair for 
> ethernet works for 100m that would seem that safe to say.

Ethernet works on lower voltages and has a different problem.
Specifically ethernet needs to be able to get a packet across the wire
in a specific amount of time. Also the digital nature means it needs
better signal quality or it degrades significantly. Analog phone can
degrade more gracefully. 
-- 
Steven Critchfield <critch at basesys.com>