Good morning.
I have an issue for following call flow :
MGC 8 -> pjsip
> INVITE
....
< OK
>ACK
...established rtp g711a...
< re-INVITE T.38 attempt to switch to t.38
> 100
>488 Not acceptable here
<ACK
After this ACK my provider required me send re-invite with G711a but in
my opinion session which use g.711a already exist and attempt to change
it failed so session have to continue with with previous negotiated codec.
Beside this in accordance with RFC 3261 :
"If the other party does not accept the change, he sends an error
response such as 488 (Not Acceptable Here), which also receives an ACK.
However, the failure of the re-INVITE does not cause the existing call
to fail - the session continues using the previously negotiated
characteristics."
Do i am right that re-invite in NOT mandatory by standard to continue
call with previous established RTP session ?
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