Wiring help?

Mikkel L. Ellertson mikkel at infinity-ltd.com
Tue Apr 4 20:07:41 UTC 2006

Robin Laing wrote:
> Tim wrote:
>> Mikkel L. Ellertson:
>>> It has to do with backward compatibility. Remember, the same jacks
>>> are used for more then Ethernet.
>> I've read about that, but I really do not think it's a sensible thing to
>> mix phone and ethernet wires together in the one connector as a standard
>> thing to do.
> Really?  In the building I work in, all the jacks (4 per wall plate) are
> RJ45.  Go to a patch panel and can be used for either phone of
> computer.  If we go to ip-phones, then all the jacks are usable.  If
> there is a need for 3 phones and one computer at that jack, it can be done.
> It makes life very easy for the IT/telcom people.  More options for
> adds/moves/changes.  I move offices and they only have to change the
> patch cables for both.
This is a fairly common arrangement. It also has the advantage that
if you plug into the wrong jack, the only result is that it doesn't
work. Now, using the same cable for both data and POTS (analog
phone) at the same time is not a good idea. It can work, but you can
end up with crosstalk.


  Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!

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