Hello!

On 20.10.20 at 14:00 Asterisk Development Team wrote:
> The Asterisk Development Team would like to announce the release of Asterisk 
> 18.0.0.
> This release is available for immediate download at
> https://downloads.asterisk.org/pub/telephony/asterisk

I just tested the new codec negotiation feature and unfortunately wasn't able 
to get it working as expected. I tried several configurations - but none has 
been working - the result
has always been the same.

Use case:
Alice calls Bob - sends INVITE                  G722 / alaw / ulaw

Configured in Asterisk for this device:         G722 / alaw / ulaw / gsm
A:
codec_prefs_incoming_offer = prefer: configured, operation: intersect, keep: 
all, transcode: prevent


Bob:
Configured in Asterisk for this device:         alaw / ulaw
B:
codec_prefs_outgoing_offer = prefer: configured or pending, operation: 
intersect, keep: first or all, transcode: prevent
Asterisk sends INVITE to Bob                    alaw / ulaw


Asterisk receives OK from Bob                   alaw
B:
codec_prefs_incoming_answer = prefer: configured or pending, operation: 
intersect, keep: first or all, transcode: prevent

Asterisk sends OK to Alice                      G722 / alaw / ulaw
A:
codec_prefs_outgoing_answer = prefer: pending, operation: intersect, keep: 
first or all, transcode: prevent

=> I would have expected alaw to be sent to A - but G722 / alaw / ulaw is sent 
and transcoding is active!


What did I do wrong?
Could you please add the correct configuration you expect to get the expected 
result alaw?



Thanks
Kind regards
Michael

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