Hi all,
Currently running a pretty old version of Asterisk, we are due to upgrade in the near future but just need to find a way around this issue in the meantime on the current version 13.10.0
We have a system setup as
PSTN => Asterisk PBX => Asterisk PBX => PSTN
Calls work fine when going out and use PCMU both ways
sip.conf
disallow=all
allow=ulaw,alaw
dtmf=inband
Changing ONLY DTMF causes Asterisk to send PCMA and receive PCMU; the priority is the same in the sdp with PCMU being listed first
disallow=all
allow=ulaw,alaw
dtmf=rfc2833
Is this a bug that got fixed at some later version? I have never known DTMF to impact codec choice or cause a different codec than specified to be sent.
In the meantime are there any options which can assist in this?
Thanks in advance!
EDIT:
Tried restricting to use just ulaw.
Still send alaw when DTMF is rfc2833
Send ulaw when DTMF is inband