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2620 and Nortel PBX integration

We are trying to integrate a 2620 as an H.323 gateway for a PRI with a Nortel PBX. Running debug shows that we are sending SABME requests, and the PBX vendor says they are seeing those request. Problem is that the PBX sets its D-channel to an active state, but we never receive an ACK on the router so the PRI just hangs on the 2620 with the D-channel in a reserved state. PBX vendor is claiming everything is configured correctly on their end. We have tried setting up for DMS-100, DMS-250, NI on both ends in order to get the D-channel to properly intialize. Has anyone run into this before? Any thoughts on changing over to MGCP instead of trying to run H.323? We have not yet tried to setup as straight T-1 to see what happens, but I don't see what else we can do on our end to fix this.

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New Member

Re: 2620 and Nortel PBX integration

Assuming it is a Meridian, try using QSIG if the Nortel has the package for it. Otherwise, try 5ESS (ESS5 on the Nortel) and make the 2620 the network side. Nortel doesn't like to be the Network end unless it is running SL1, QSIG, or NI2 (which then requires CBCT setup) See if that helps.

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