Sorry I felt left out.. :)
-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Micha?l Gaudette
Sent: Thursday, October 20, 2005 2:37 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] Re: T1 questions follow-up
Tom, Thank you! This was all hypothetical, because I'm trying to wrap my
mind around the concept. But you've made it much clearer for me. I still
have a few follow-up questions...
1a) Forget the hypothetical company now. Let's say 6 outside lines were
deemed sufficient, and there were 12 employee (i.e. inside lines). Could I
have the same Digium T1 card to service out and inside the company?
Yes. You can order a T1 ISDN PRI from most carriers and they can limit the
circuit amount on the T1.
1b) I'm fairly certain of this, but anything going outside, I could use the
same T1 for receiving calls as for sending them, right? (not with the same
channel at the same time, obviously, but I could use 2 lines incoming and 4
outgoing, or 3 incoming and 3 outgoing, depending on the current situation,
without reconfigurin the PBX?)
Yes you have to tell them that you want a Bi-Directional PRI. Yes. You
would use the group feature for Zaptel. The call would be something like:
dial(ZAP/g1) this would take the next channel available and send it out.
2) When you say a PRI is necessary for a Caller-ID name (as opposed to just
number), I've looked around and I understand a PRI uses a T1 tunnel (24
channels) but a bit more expensive. Is this a fact, or is it something
completely separate that I couldn't use with Asterisk? Or am I completely
out in left field?
What you want to order is ISDN PRI NI signaling. CAS will not cut it for
you. Yes. Normally you would have 24 channels in a T1. However they can
fraction it off for you with 1 D channel and X amount of B channels.
..o-------------------------------------------------------o..
Brian Fertig
Network/Systems Engineer
IT Administrator
Planet Telecom, Inc.
Tampa,FL Office
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