Michael Maier wrote: <snip>
And: The ringback tone wasn't missing, if the second number (the second trunk) of the asterisk installation was used! The only difference between those two trunks is: The first trunk is configured to a ring group - the second trunk is configured directly to an extension. My solution after long time of digging around: I added progressinband=never to sip_general_additional.conf But this solution confuses me, because http://www.voip-info.org/wiki/view/Asterisk+sip+progressinband tells: progressinband=never Whenever ringing occurs, send "180 ringing" as long as "200 OK" has not yet been sent. This is the default behaviour of Asterisk. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Why do I have to provide it especially if it is the default behavior? Why did it work without this option with asterisk 11? Why is there suddenly a difference in behavior between binding a trunk to a ring group or an extension?
I'm not really sure what would be different, as that would be a FreePBX construct and not of Asterisk itself. If you provide a SIP debug of the non-working case I can see if anything is out of the ordinary in the signaling.
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