I have the following setup: Nortel PBX - ISDN PRI - CISCO3825
I am trying to call to the other organization but there is no ringback tone on the line. If the other side answers, we can hear each other successfully.
There is a ringback tone when they call us.
Here is the call flow
Nortel PBX - ISDN PRI - CISCO3825 - H323 - Softswitch(gatekeeper) - H323 - CISCO2851 - H323 - PANASONIC PBX with IP module
I am attaching a debug output maybe you can give some advice
And here are the dial-peers
To Nortel PBX:
dial-peer voice 640 pots tone ringback alert-no-PI <--- added because there were several problems with ringback when someone called us huntstop destination-pattern 640.... direct-inward-dial port 0/3/0:15 forward-digits 4
We had a similiar situation but our setup & messages were different from you. Converted MGCP gateway with Cisco-Nortel trunk to H.323. After H.323 conversion, calls from Cisco phones to some internal Nortel phones gave ringback; other did not. So no ringback on calls to some Nortel phones. External calls to the PSTN go through the Nortel, and always had ringback.
Noticed that our no ringback calls did not receive CALL_PROC Q931 message from Nortel. Different from your situation as I see a CALL_PROC message in your debugs.
Solved the issue by modifying the POTS dial-peer. Removed the progress indicator commands ( 'progress_ind setup enable ...' ) from the dial-peer, and added ' tone ringback alert-no-PI' command. Ringback now worked for all Cisco -> Nortel calls.
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