On Jul 2, 2010, at 9:54 AM, Claudio Furrer elcaio@gmail.com wrote:
Ok, here it goes again.
Pay attention to the "200: OK" response from the PSTN-GW. I think its Contact header should be read by the Cisco GW (calling party), and then send its ACK-request with R-URI based on that Contact. But it doesn't happen. Then here i think this is the failure. (rfc3261, section 12.1.1 and 12.2.1.2). May i am wrong..
What do you think? I'd appreciate your comments
I agree with your assessment. The target request URI of the ACK generates by the Cisco UAC should be the Contact URI received in the 200 OK.
I work with Cisco ISDN-VoIP gear all the time and have never seen a device do that, though. It is either a very unusual bug in a very old IOS release or a misconfiguration.
Can you tell me what device and IOS version is involved? Also, applicable elements of the running-config could help.
Cheers,
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