Hi Michael, Wow, honoured & a bit starstruck by your reply in person (or do you celebs have somebody that replies for you ?)! Your FS books pretty much travel everywhere with me at the moment! Ok, but seriously, please excuse the poor but hopefully amusing/just about understandable call flow diagram attached. Basically in the 4th leg of the call (far right) an ACM is sent back to a Veraz switch (call leg 3) which sends us a 180 without SDP which we (FreeSWITCH, call leg 2) transit to the customer (1st call leg) without manipulation. The customer is apparently unable to generate ringing locally. So basically the question is can FS map/convert the 180 without SDP received into a 180/183 WITH SDP for onward transmission. Am trying to get a trace but unfortunately customer is not sending us traffic at the moment due to this "issue". Once again, excuse lack of wordsmithing/Visio/Powerpoint but travelling without my normal array of bells & whistles! <3 FreeSWITCH! Rgds, Mick T. +44 20 7001 6869 E. mickstevens@yahoo.com www.twitter.com/mickstevens Sent En Route... ________________________________ From: Michael Collins <msc@freeswitch.org> To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org> Sent: Monday, 8 October 2012, 21:32 Subject: Re: [Freeswitch-users] Generate 180/183 with SDP upon receipt of a 180 without SDP Hi Mick, What is the call flow in this case? I'm curious to know what call legs exist and where the 180/183 is and is not happening. FreeSWITCH generally does all this for you, so I suspect there's a gremlin in the works. Can you pastebin a console debug log w/ SIP trace? That may give the gang here just enough information to figure out what's going on. Thanks, MC On Mon, Oct 8, 2012 at 2:26 AM, Mick Stevens <mickstevens@yahoo.com> wrote: Hi Folks,
Does anybody know a way I can get FreeSWITCH to generate a 180 or 183 with SDP upon receipt of a 180 without SDP?
Unless I'm being stupid (quite possible) I couldn't find an answer to this on the wiki, although lots around early media (I don't really want to resort to generating ringing for every call, in case the callee is genuinely engaged/busy for example).
The context behind my enquiry is that I send traffic to another SIP carrier that then hands the traffic off at ISUP. Where the ISUP carrier sends back an ACM with a backward call indicator of "subscriber free" the carrier sends a 180 without SDP to me/FreeSWITCH assuming that any ringback tones will be generated by the SIP user agent (RFC 3398 blah, blah, blah).
Any help much appreciated! Rgds, Mick Tel/SMS. +44(0)7967 594432 Fax. +44(0)7053 452429
Email/IM. mickstevens@yahoo.com Skype: mick_stevens www.facebook.com/mickstevens www.twitter.com/mickstevens
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