[vox-tech] Carrying telephone signal over ethernet

[Mitch Patenaude]

I could be wrong, but I believe that Cat5 uses all 4 *pairs* of wires, 
and not just 4 wires.  Maybe that's only for full duplex....

IIRC, Cat3 (i.e. 10baseT) was designed with phone compatibility in 
mind.. and leaves the center pair unvired, so that it's compatible with 
the older rj11 plugs in a very direct way.  You can plug an old rj11 
plug into a rj45 jack, and I think that the original conception was 
that every jack would carry both phone and ehternet, and you could plug 
either computer or phone in as needed.

   -- Mitch


On Thursday, Mar 18, 2004, at 13:44 US/Pacific, Mark K. Kim wrote:

> So my dad's workroom has no phone line, believe it or not.  I do have a
> phone line in my room, though, and we got a ethernet line between our 
> two
> rooms.  Since 10baseT uses only 4 of the 8 lines on the cat5 cable I'd
> like to use the unused lines to carry the voice signal.  I know cat5 
> was
> designed to do this (middle two lines are open), and I've done it 
> before
> with custom adapters (messy), but I can't find any splitter online that
> does this.  Anyone know where I can get a pair?  What's it called?
>
> Thanks!
>
> -Mark
>
>
> -- 
> Mark K. Kim
> AIM: markus kimius
> Homepage: http://www.cbreak.org/
> Xanga: http://www.xanga.com/vindaci
> Friendster: http://www.friendster.com/user.jsp?id=13046
> PGP key fingerprint: 7324 BACA 53AD E504 A76E  5167 6822 94F0 F298 5DCE
> PGP key available on the homepage
> _______________________________________________
> vox-tech mailing list
> vox-tech@lists.lugod.org
> http://lists.lugod.org/mailman/listinfo/vox-tech
>