A question for all the Voice people

burbankmarcburbankmarc Member Posts: 460
Does anyone know anything about qsig and sip? We're about to run this experiment involving Nortel PBX to Cisco SIP gateways. What we're curious about is qsig path replacement.

Here's a sweet ascii diagram:


What our switch vendors are telling us is that the qsig D channel remains intact across the sip trunk, and back to the astratelecom PBX. If this is the case then theoretically path replacement should work fine.

However, if the D channel is not intact, then how do the SIP gateways translate the qsig messages into SIP messages?


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