Details
Are you getting reports of calls dropping? Often, the issue is that the SIP carrier is not accepting re-invites from Communication Manager (CM). We can see this in the example below by running a traceSM command from Session Manager.

Description
When the re-invite from CM is sent out, you will ultimately see a 481 call leg/transaction does not exist from the carrier side, then a Bye message from CM within the trace.



Solution
To fix this, you need to turn off shuffling or Direct IP to IP Audio on the Signaling group in CM.

1. Type change signaling-group + the number of the signaling group you need to change.
2. Change 'Direct IP to IP Audio Connections from Y to N and save.



3. In Session Manager, re-run the traceSM command, and you will see there are now re-invites being sent by CM, and the calls stay active.

 

Have a suggestion for your next post? Subscribe today and leave us a suggestion!

 

#intlxSolves