Jeremy,
Both 1 and 2 are feasible and have been done by many people including
the company I currently work for and the company I previously worked for.
For the analog lines, I would recommend a channel bank with analog
ports. If you want to redirect inbound calls on an analog line as well
as send calls via analog to a PBX to support 12 lines you will need 24
ports. If you are only using 12 ports a channel bank may not prove to be
cost effective. If you use a channel bank then the hardware for system 1
and system 2 could be the same exact system.
-Jonathan
Jeremy Mann wrote:
I have a ton of Nortel MICS/CICS phone systems and am looking for an
easy way to integrate them.
Two questions arise:
1. Is it feasible to use asterisk as a Man in the Middle for a T1 PRI
system? The idea is to intercept outbound calls from the Nortel PBX
and redirect them via VoIP to another asterisk box at another branch
transparently(thus saving the LD cost). Otherwise I’d pass the call on
to the T1 for outbound processing. Our Nortel is already PRI equipped,
the PRI would just come from the Asterisk box instead of the Telco
directly.
2. Is it feasible to use asterisk as a Man in the Middle for Analog
lines? I’d be using anywhere from 4-12 lines depending on location
size. I’d like to do the same feature as above(intercept outbound
calls and redirect them using VoIP if they are inter-office calls.
a. I’d also like the VoIP trunks to be used for outbound calls in the
case of PSTN downtime or busy. For example, all 4 outgoing lines are
in use, person 5 wants to make an outbound call and it gets redirected
to one of my T1 offices. I’d attach their outbound caller ID to make
it appear as the call came from that location.
My inevitable hope is to reduce my analog presense in smaller
communities to 1 primary Line for 911/emergency calling, and to get a
published presense in the community. I’d then beef up my T1 locations
to handle more VoIP based calls. Currently we’re using on the order of
30k minutes a month of LD just intercompany, about 10k external
(IntraLATA).
I’d also like any insight or suggestions on uptime. We’re a healthcare
organization so 5-9’s is what we’ll require.
Any suggestions on hardware configs(or better yet, Bids!) would be
appreciated as well. I don’t need VoIP capable phones yet, but if the
system works well enough we’d probably startup our next
location(averaging 3-6 per quarter) with a pure VoIP system with
Nortel fallback(again, 5-9’s is critical).
I’m located in Dallas, TX for any bids that might include
installation. We have a presense up to about 400 miles west of here.
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