H.323 wtih E&M to CCM Calls problem

Unanswered Question
Oct 9th, 2007
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The topology is as follows:

CCM---WAN---Voice Gateway with E&m E1 --->PBX

The voice gateway is configured as H.323 gateway on CCM. If a user behind CCM 4.1 tries to call a user behind the PBX it is successfull.

If a user behind the PBX tries to dial a user behind CCM the user's phone rings and once he picks up the handset he hears two beeps and then the lines drops.

I have checked the codec and it is the same on both sides.

I appreciate any thougts on this issue,

Remark: The E&M E1 is using immediate start signaling


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paolo bevilacqua Tue, 10/09/2007 - 13:07
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E&M on E1 is relatively not standard and the PBX may differ from the router in running the protocol.

If you cannot absolutely configure PRI for this connection, thing that would solve the problem, please send here relevant config, and output of "debug vpm signal" for one successful and one unsuccessful call.


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