asterisk users - Mar 2006 - dropping voice frame ulaw - slin?

Mar 15 12:54:01 NOTICE[24269] channel.c: Dropping incompatible voice
frame on Local/[removed number]@context-5c3e,2 of format ulaw since our
native format has changed to slin

 

 

Can anyone provide an English translation of what this means?

 

 

The extension is a Polycom IP 501

The only allowed formats are g.711u

MOH is MP3 files (obvious)

All prompts have been re-recorded in .ul uLaw

Voicemail is recorded in wav|ulaw so there should be native playback to
g.711 UAs and the wav is for windows email attachments.

Outbound termination is to a Sonus GSX media gateway, g.711u is the only
allowed codec for that peer (disallow=all allow=ulaw)

Sip friend (the extension) has disallow=all allow=ulaw

 

The entire RTP path should never be anything but ulaw!

 

What is slin and what does this NOTICE mean?

 

I have seen this question asked before, but did not find one with an
answer

 

Thx!

 

 

 

 

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I've also experienced this as well, but with g729, and alaw.

Mar 23 10:59:35 NOTICE[17891] channel.c: Dropping incompatible voice frame
on Local/001727413769@sanset-6a3a,2 of format slin since our native format
has changed to g729
Mar 23 10:59:35 NOTICE[17891] channel.c: Dropping incompatible voice frame
on Local/001727413769@sanset-6a3a,2 of format slin since our native format
has changed to g729
Mar 23 10:59:35 NOTICE[17891] channel.c: Dropping incompatible voice frame
on Local/001727413769@sanset-6a3a,2 of format slin since our native format
has changed to g729
Mar 23 10:59:35 NOTICE[17891] channel.c: Dropping incompatible voice frame
on Local/001727413769@sanset-6a3a,2 of format slin since our native format
has changed to g729

I do know that slin is the internal codec used by Asterisk.

No one has come back with a solution, or why this happens.

Joe