Hi Tech,
We are having problem getting SIP to work from an AudioCodes 1000 to our CS5000. (See my other post.
http://mitelforums.com/forum/index.php/topic,5037.0.html)
When making a SIP call...
- The CS5000 sends an Invite packet to the AC1000.
- The AC1000 sends 'Trying' packet , then 'Ringing'
- RTP is flowing from AC1000 to the CS5000, but to UDP ports that are not ready, as the 5000 is not happy that a call has started.
- The AC1000 processes the call, then sends back a '200 OK' packet when the call is answered at the remote end.
- The 5000 does not 'ACK' the '200 OK'.
- The AC1000 ends the call, due to no response from the CS5000.
- The 5000 responds with a '400 Not found' packet , indicating that there is no call to end anyway.
There seems to be a mismatch with the SDP between the Audio Codes Gateway and the CS5000. In doing research one of the fixes for this on the Mitel 3300 is to disable the Mitel proprietary SDP. However looking at the CS5000 I'm unable to find any SDP settings, hence my reason for asking.
Thanks