HI all
We have a problem with SIP tunnel betwen some CME and/or Asterisk and also with Call Manager 6.x
Problem: SIP tunnel between all end point (CMEs and CUM 6.x) connected to an Asterisk (as a switch)
All calls are ok on SIP side but sometimes we do not have Audio.
Configuration:
End-Points: CMexpress directly connected to ISP (No NAT for voice)
On CM side: Connected to 2811 as a SIP tunnel endoint. Second interface connected to ISP
All calls ring but sometimes we do not have audio (we must dial 2 to 3 times an remote extension to get the RTP stream)
The problem always arise:
Fom clls originated on Asterisk users to CM 6.x or to CMexpress users
From CME to CM users or other CMEs users the same problem
Any idea?
A sample configuration attached
All configs are based on this one except for the SIP gateway connected to CM 6.x
In annex one of the configs and a debug ccsip mess with a failed call (no audio both ways) and one call ok
(since the problem can be between 2 CME with this exact config)
The NAT is used for data access for Internet
Thanks for any help