CUCM 6.1 + GSM VTMflex + E1 PSTN rollover

Unanswered Question
Jul 7th, 2009

Hello all,

I have the following scenario:

One Publisher connected trough one E1 to Ecotel GSM VTMflex (MGCP controlled).

CUCM is also connected to a 3845 router with an E1 PRI to PSTN, also MGCP controlled.

The intention is for calls to flow to PSTN when GSM Gateway is full.

Traces show that the GSM gateway is sending a DISCONNECT with cause 0x81A2 - No channel available.

Apparently, to my understanding, CUCM is not interpreting this information correctly.

I browsed through CUCM's Service Parameters and found none that could possibly solve this issue.

I could probably try and solve this by creating the GSM GW as an H.323 one and point it back to CUCM but, if it is possible, I would like to stick to the MGCP configuration.

Any comments on this are highly appreciated.

Best regards,

Pedro Marques

I have this problem too.
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