I have to admit I've never seen CAT3 in anything less than 3-pair (and
most commonly 4-pair), but I learn something new every day.
We've ripped out M1s before and re-used the cabling. Works like a charm.
Jim
Andre Courchesne - Consultant wrote:
Buy Cat3 I mean Cat3 spec cable (impedance and all), but only 1 pair
going to each room. The asterisk system replaced a big Meridian based
system. that was feeding analog "lines" to all the student rooms. We
simply stripped the Meridian system, connected the audiocodes to the
existing patch panel and connected the asterisk box to 2 PRIs.
I agree that a full IP is the way to go, but in this case that was
just not an option.
Would I redo it with audiocodes? No, I would go Mediatrix now
especially that they are a Canadian/Quebec based company.
Jim Van Meggelen wrote:
Andre Courchesne - Consultant wrote:
Problem is that there are no cat5 infrastructure in the residences
and they are spread over 5 buildings all wired with cat3 (1pair) only.
1 pair CAT3? Are you sure about that? You can't really call a cable
CAT3 unless it supports 10-base-T Ethernet, which requires two pairs
no matter what. I'm pretty sure the CAT3 spec is pretty much always
going to be 4-pair, but for sure it has to be 2-pair or Ethernet
ain't gonna happen, in which case it's not really Cat3 anymore.
Are you sure that's not quad cable they've got there or something?
The reason it matters is that you can totally run IP phones over Cat
3. We do it all the time (my partner Joel and I wrote an article
about this in the July 2008 issue of Cabling Business Magazine). It
requires a bit of planning, and a good pre-survey, but CAT3 works
just as well for VoIP as CAT5 if it's done correctly (it even meets
the current PoE spec).
The students have their own phones (cheapo analog phones). The 9116
are used for admin staff sharing space in those buildings.
For the admin staff I would definitely look into IP phones. Saves all
that money buying and maintaining expensive FXO ports
Jim
John Lange wrote:
The Aastra 9112i is a SIP phone so you must mean another model? In
any
case, I would think the Aastra SIP "terminals" (as they call them)
would
be just as durable as the analog only models.
If you are doing this in a student residence with analog phones,
why not
just require them to supply their own phones?
The Call-waiting-caller-ID features is quite nice so I'd encourage you
not to disable it. Try testing it with a consumer level phone that
supports caller id to confirm it's working.
I have not encountered a current model of consumer phone with
caller id
that does not also support callerID on call waiting.
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