[asterisk-users] Migrating asterisk 11 to 13: some callers get no ringback tone any more

Joshua Colp jcolp at digium.com
Tue May 3 06:09:08 CDT 2016

Michael Maier wrote:


> 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 

Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org

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