On 15 July 2013 15:14, Hristo Trendev <[email protected]> wrote: > Hi, > I am using asterisk 1.8.22 and have a problem when calling in parallel > several SIP endpoints and I am not sure how to resolve it. In this case > Asterisk will not bridge any audio to the caller before the 200 OK. Which > means any progress announcements, including remotely generated ringback, > are not passed back to the caller. > > This behavior is completely correct, because there is no way to know which > early media audio stream to pass back to the caller in a parallel call > scenario (as in this case several endpoint may indicate session progress > all at the same time). > > The question is why is asterisk still sending 183 session progress back to > the caller if no audio is to be bridged before the 200 OK anyway? If 183 > are not passed back to the caller, then at least a 180 Ringing that may > come from another endpoint will cause the calling endpoint to generate > local ringback. This won't happen if the caller has received a 183 already. > > So it's a bit of a race condition as well - if the first endpoint to reply > sends a "183 session progress" this means the caller will not hear any > ringback even if some of the other endpoints are sending back 180 Ringing. > > The question is can I somehow block 183 messages from being passed back to > the calling endpoint when dialing several destinations in parallel? I don't > see a point (please correct me if I'm wrong) to pass only the 183 SIP > message back to the caller without the corresponding RTP stream, so it may > be much better to actually ignore it when dealing with parallel call > scenarios (bug?). > > BR, > Hristo > > -- > _____________________________________________________________________ >
I think you need to look into early media and also this application https://wiki.asterisk.org/wiki/display/AST/Application_Progress -- Ishfaq Malik Department: VOIP Support Company: Packnet Limited t: +44 (0)845 004 4994 f: +44 (0)161 660 9825 e: [email protected] w: http://www.pack-net.co.uk Registered Address: PACKNET LIMITED, 2A ENTERPRISE HOUSE, LLOYD STREET NORTH, MANCHESTER SCIENCE PARK, MANCHESTER, M156SE COMPANY REG NO. 04920552
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