Hi All,
Our experience with * to date has been a bit limited. It's a 4xCisco 7960 network, linking our head office with a faraday caged datacenter. As a way of putting voicecomms into a sealed room, it was quick and easy to deploy, and works very well. As typically happens, we've now thought about extending the use of asterisk - and a new opportunity has cropped up. In three months time, we have a couple of new small offices coming on stream. Prices quoted for POTS comms have been expensive, so we've decided to look at providing an Asterisk/VOIP solution for the 30 or so users, and just having a couple of local analogue lines for fax and emergency use. The aim of the asterisk solution is to provide both external POTS connectivity and the ability to make internal calls to our existing head office network. (350 extension Mitel SX2000). In theory we should be able to assign a head-office DDI number for each desk in the new offices, and route calls transparently via the asterisk server to the VOIP extension.
Current plan is that we buy a digium TE110P Card, and crossover-connect it to the Mitel PABX as a secondary exchange. Asterisk will have no direct PSTN connection, but will route all non VOIP to VOIP calls via the Mitel. Unfortunately I can't find any info on the * Wiki or in the list archives about how to go about configuring this combination. Mitel have confirmed that the E1/EuroISDN option should connect to the PABX, and that 'QSIG can be enabled on the exchange' but have stopped short of saying that the two will talk to each other.
1. Does anybody have any experience of trying to get * talking to a Mitel SX2000 Lite?
2. Is there a definitive list of what asterisks implementation of QSIG supports, and what it doesn't? Is the current support level likely to be sufficient for the above, or do we need to look at some alternative method/protocol?
3. What pitfalls do we need to look out for when implementing the above, over and above the usual datacomms latency/capacity issues?
4. Coming from a datacomms/systems background, I find all this talk of channel banks, spans, signalling protocols, TDM and so on a bit of a foreign language. Does anyone know of a good primer on the web somewhere that would help in getting up to speed with voicecomms terminology?
Any help gratefully received,
Chris Morgan
UFI Limited
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