Hi, If the UAC is sending non-CANCEL requests (INFO, PRACK, UPDATE, re-INVITE etc) before 200 OK it would use the Contact information. Regards, Christer
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 21. lokakuuta 2008 9:03 To: [EMAIL PROTECTED]; [email protected] Subject: [Sip] Sip query - A query on Sip call flow - * Party sends out INVITE with SDP info to party B to make a call. * Party B receives the message and sends back 183 Session progress with SDP info to party A. In the 183 message, it does have Contact information. * Now, party A sends out CANCEL message to party B using contact header information received in 183 message. Will it be valid in SIP to use Contact information before receiving 200 OK message or not ? CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is being sent by 3Com for the sole use of the intended recipient(s) and may contain confidential, proprietary and/or privileged information. Any unauthorized review, use, disclosure and/or distribution by any recipient is prohibited. If you are not the intended recipient, please delete and/or destroy all copies of this message regardless of form and any included attachments and notify 3Com immediately by contacting the sender via reply e-mail or forwarding to 3Com at [EMAIL PROTECTED]
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