On 7 April 2011 23:04, Douglas Mortensen <[email protected]> wrote: > Steve. Thanks for the insight. I won't pretend to know what "early-audio" is, > but I guess I'm about to find out :-). > > Also, I believe that I have a nearly identical setup like this with the exact > same SIP provider w/o any trouble. However, I think that system must be > running asterisk 1.4 or 1.2 (my guess is 1.4, but I'll have to check to > confirm). Is there a significant difference between 1.2/1.4 & 1.6 in this > scenario? > > Thanks a million!! :-) > > - > Doug Mortensen > Network Consultant > Impala Networks > P: 505.327.7300 > . > > > -----Original Message----- > From: Steve Davies [mailto:[email protected]] > Sent: Thursday, April 07, 2011 10:49 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: [asterisk-users] No ringback even though progressinband=yes is > set > > On 7 April 2011 17:02, Douglas Mortensen <[email protected]> wrote: >> Any ideas on why callers who call into my customer's SIP trunk are not >> hearing a ringback tone? I had this on one other asterisk system, and wound >> up needing to set progressinband=yes in the SIP trunk config. >> >> I have set this on the current system & restarted asterisk, but to no avail. >> >> I am using: >> >> AsteriskNOW distro >> Asterisk build is 1.6 from AsteriskNOW repository: >> asterisk16-1.6.2.17.2-1_centos5 FreePBX 2.9 >> >> Any help would be greatly appreciated! :-) >> >> - >> Doug Mortensen > > > In my personal experience with SIP and 1.6.x, that mostly depends on where > you are sending the call to. It depends on whether the next or subsequent leg > tries to use early-audio for the ring tone, or uses a Ringing event to signal > that is what is happening. It then depends on whether the originating > caller's equipment can understand early-audio ringing. > > We have a setup here where all our trunks support early-audio ringing except > one (an ISDN30 circuit) and we have to juggle things a bit sometimes to > ensure ringing occurs. > > Perhaps provide more details? Or you may find that tracing the SIP gives you > the clue that you need. > > Hope that helps, > Steve > >
Early audio is audio that is sent before the call is "answered", usually in the form of a custom ring-tone or perhaps a "cannot connect, try later" message. Some systems do not support it as it can be abused to communicate at least basic information for free. We had a problem with this when connecting Asterisk 1.2 to Asterisk 1.6 via IAX. A 1.2 SIP system will automatically switch into early audio if it sees an early audio frame. 1.6 defaults to not doing this, but there is a parameter to re-enable it. In this case we solved the problem by upgrading to 1.6 everywhere :) Regards, Steve -- _____________________________________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
