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...n => 456,2,Dial(IAX2/ilbcUser) exten => 789,3,Dial(IAX2/g729User) You're pretty much forced to accept ULAW, and then transcode. Not fun if your provider does it for you (that's what you pay them for, right?). So, with this patch, just add a new config file. codec_passthrough.conf: [iax_my-did-provider] 123=gsm 456=ilbc 789=g729 Now, when an incoming call comes in, the user/extension will be found, and your preferred codec changed. No more transcoding. http://bugs.digium.com/bug_view_page.php?bug_id=0003553 My main question is: Can this be done without this patch? I've hea...