All circuits are busy

[tom]

My client is having intermittent problems their CM 4.2.3. I think it is a GATEWAY/PRI (2851’s) related. I need some help trouble shooting advice from a CM Gateway standpoint.

There is nothing to obvious in the system logs. When callers call from the outside they get an AT&T message saying (All circuits are busy). Is there anything obvious I can check? This only happened for about an hour yesterday and today from 8:00AM to 9:00AM., and then the (All circuits are busy) message for AT&T disappears. From the logs, the PRI’s are under utilized and never get close to capacity.

Thanks Tom

[Jaime Valencia · Accepted solution]

If you have the CUCM traces from that time you can use VLT or triple combo to look at the ISDN messages and the disconnect side and reason.

This really should have been looked into at the time and with debugs in the GWs.

HTH

java

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www.cisco.com/go/pdihelpdesk

[tom]

Java:

I did some additional testing on the 2851 gateway. sh voice dsp active and can see the calls populating.

It has to be our teleco. I am opening a ticket with them. Wish me luck.

Thanks Tom     

[paolo bevilacqua · Accepted solution]

When in doubt, check show isdn active. If you see any stuck call, reload is the safest option.