[vox-tech] Carrying telephone signal over ethernet

[Seth Nagao]

I don't know about adaptors, but if you can find a rj45 duplex adaptor and
an rj45 to rj11, then you can make/modify one.  If you can find a
combination adaptor box, it's even better.  HSC might have something like
that, and you can just wire it up as you see fit.  For aesthetics, perhaps
a project enclosure might work.
If you have the cables ready, and you don't mind looking "ghetto", you can
always remove the ends off the ethernet cable and splice the unused pair
to phone cables.  I'm assuming that you want line 1 on the phone, so the
red and green are the ring and tip.  Provided you have cables, rj45 ends,
crimper and soldering tools laying around, it's free.  Extra points for
using heat shrink instead of electrical tape. :)
Come to think of it, you could probably use a surface mount box like this:
http://www.9thtee.com/networking.htm  If you could find one with 3
keystones, you could make an adaptor easily.   A two-port will work, but
it won't be removable.
If you have the ethernet jacks installed in the walls, then it's even
easier.  Get a couple of rj11 keystones and hook them up.
--Seth
(whose rambling probably helped no one today)

Jeremy Brown said:
> Mark's original idea should work if he's happy with 10BaseT and doesn't
>  mind some potential extra noise on both the phone and data lines.
>
> The trick I'd use if I wanted to do this without spending a lot is get
> a  couple 10BaseT splitters like these
> http://www.directron.com/1206510.html
> http://www.pagecomputers.com/cgi-bin/page/S0253406.html
> http://www.costcentral.com/prod/Belkin/R6G022/117637/
> and rewire a couple phone cords with rj45 plugs on one end. Either that
>  or move to the UK and get a coolport. From what I know, there's no
> easy,  clean, and cheap solution.
>
> I don't think you're supposed to mix voice and data on cat5, which
> would  explain the lack of products that would do this, but I could be
> wrong.
>
> -Jeremy
>
>
> Mitch Patenaude wrote:
>
>> 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
>>>
>>
>> _______________________________________________
>> vox-tech mailing list
>> vox-tech@lists.lugod.org
>> http://lists.lugod.org/mailman/listinfo/vox-tech
>
>
> _______________________________________________
> vox-tech mailing list
> vox-tech@lists.lugod.org
> http://lists.lugod.org/mailman/listinfo/vox-tech