Hi, I think the originator GW mostly can relay on "early SDP media", but it's not 100% accurate. Terminator GW may always choose to send early SDP media (in order not to loose the very first voice), but for the same calls the remote RGB may be not available (PSTN returns to the Terminator GW the availability of RGB in alerting parameter). Is there some additional algorithm to make a decision ?
Thanks to all Ira -----Original Message----- From: Christer Holmberg (JO/LMF) [mailto:[EMAIL PROTECTED] Sent: Wednesday, February 18, 2004 11:29 AMin To: '[EMAIL PROTECTED]'; ira kadin Cc: [EMAIL PROTECTED] Subject: RE: [Sip-implementors] remote or local ringback tone for SIP Hi, >If the provisional response contains SDP, the gateway switches the (early) >media path (assumption is that media offer-answer exchange either through >INVITE/RPR or INVITE/Prov.Resp has happened) to play the announcement or >the remote RBT. Else the local RBT shall be applied. That is an assumption often done, but I don't think it's specified anywhere that an SDP is some kind of early media "indicator", is it? Regards, Christer Holmberg Ericsson Finland This communication is confidential and intended solely for the addressee(s). Any unauthorized review, use, disclosure or distribution is prohibited. If you believe this message has been sent to you in error, please notify the sender by replying to this transmission and delete the message without disclosing it. Thank you. E-mail including attachments is susceptible to data corruption, interruption, unauthorized amendment, tampering and viruses, and we only send and receive e-mails on the basis that we are not liable for any such corruption, interception, amendment, tampering or viruses or any consequences thereof. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
