[asterisk-users] No rtpmap codec info in 200 OK

[William Scott]

> It seems quite unlikely that the presence of
> an 'a=rtpmap' line in the SDP for G.729 is going to cause a call to have any
> problems.

Thanks for the reply.

I'll expand on the scenario...

This particular ATA does not send  'a=rtpmap' for any codec.

When talking to a Asterisk PBX everything works fine.

When talking to a VSP that sends an INVITE with "User-Agent: Sippy"
the call is setup then drops after 32 seconds.

Packet captures shows that no ACK is received after the ATA sends the
200 OK (missing rtpmap). After sending 200 OK about 6 times it then
sends BYE and the call disconnects.

Every other ATA I have sends rtpmap and works fine.

The idea was to manipulate Asterisk into not sending rtpmap for the
codec to confirm what happens.

I'll now look for another solution.