El Miércoles, 30 de Enero de 2008, Jan ONDREJ (SAL) escribió: > On Wed, Jan 30, 2008 at 04:26:26PM -0500, Alex Balashov wrote: > > On Wed, 30 Jan 2008, Jan ONDREJ (SAL) wrote: > >> On Wed, Jan 30, 2008 at 04:20:32PM -0500, Alex Balashov wrote: > >>> Do your phones actually support transfer via the REFER method, or by > >>> issuing 302 Moved Temporarily messages? > >> > >> I see "REFER" in sniffed packets (Polycom phones). > > > > Gotcha. So what do you want OpenSER to do with these? Or perhaps a > > more useful question is, what are you doing with OpenSER? > > We are using openser to route calls between our gateway, a PSTN gateway, > ENUM, etc... > Evrything worked fine before we tryed to transfer calls from phone to > phone. I want to add this feature to my VoIP site.
Error: Have you investigated how REFER works? Two examples: case 1) 3 phones (A, B, C) - A calls B and they speak. - B wants to transfer the call to C. So B sends a REFER to A like this: REFER sip:[EMAIL PROTECTED] Refer-To: sip:[EMAIL PROTECTED] - So A will receive that REFER and then A will generate an INVITE to C: INVITE sip:[EMAIL PROTECTED] From: [EMAIL PROTECTED] - So in conclusion: a REFER in fact means: "please, invite this other user". case 2) 2 phones (A, B) and a gateway. - The gateway calls B and they speak. - B wants to transfer to A so it sends a REFER to gateway like this: REFER sip:[EMAIL PROTECTED] Refer-To: sip:[EMAIL PROTECTED] - So now the **gateway** should generate an INVITE to A. Unfortunatelly AFAIK most of gateways won't allow it (and it sems logical to me). What you need is a B2BUA between the gateway and phones. In this way the UAS receiving the REFER will be the B2BUA (that you control) and not the gateway. > An example configuration with call transfer support can be useful for other > users too, so it can be good to include it into openser distribution's > example configurations. No, OpenSer is a SIP proxy, not a PBX or B2BUA, it just should route the REFER according to RFC 3261 for in-dialog messages. > > OpenSER is a proxy, so it shouldn't really be "handling" referrals, > > just passing them back to the user agent/server (UAC/UAS) that will > > ultimately be taking care of that. > > It's not done by default config? Yes, it's done. The problem you have is that you are sending the REFER to a gateway. -- Iñaki Baz Castillo _______________________________________________ Users mailing list Users@lists.openser.org http://lists.openser.org/cgi-bin/mailman/listinfo/users
