MGCP GW doesn't send CONNECT_ACK

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Feb 21st, 2008
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I've a CUCM 5.1 with an MGCP GW. This GW makes a QSIG connection on a PABX. In very specific situation, I can see that my GW does not reply to a CONNECT isdn message and does not send a CONNECT_ACK.

Is there a command to force this on the Cisco GW?



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pcameron Fri, 02/22/2008 - 07:15
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An ISDN Q931 connect should always be replied to with a connect ack. What is the 'very specific situation' you refer to that causes this problem ? Do you have a debug isdn q931 log that shows the messages - if so, please paste here.

jconi Sun, 02/24/2008 - 08:07
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Thabks for the answer.

The very sporadic situation is a call to an analog bipper system connected on an analog trunk on the PBX.

It appeared that the problem was a misocnfiguration on the PBX, but of course, as it's not my PBX, I can't have the real cause of the problem.

Anyway, I still don't understand why my GW didn't reply with CONNECT_ACK.




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