Hi have install a cisco callmanager version 7.0.2 with a cisco 2821 mgcp pri controller gateway. The telco have provided a half E1 connection (time slots 1-15). The gateway successfully register with the callmanager and I'm able to establish voice calls. The problem is that the gateway/Callmanager from times to time (every minute) sends restart messages on different channels to Telco that clear the channel and the user must redial the number again to have audio. If we change to H323 the problem does not happened. Even when I don't have any calls the callmanager sends restart messages to the telco provider. On cco I have found a issue that could be related: CSCsx45587
This will sometimes solve that problem. As well, partial PRIs aren't a very good idea with MGCP. There are some ways around it, but I think this may be your case:
Your provider sends STATUS or some other keepalive on channels 1-15. The gateway doesn't see anything on the other channels, and sends RESTART. If you look at the RESTART messages, they are probably for channels 16-23.
If you do want MGCP, either change the service parameters that busy them out on CUCM, or turn off 'ccm config'.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...