Hi, Andreas, Besides what Kumar told, if 200 OK also carries SDP (after an initial offer), it must be the same as the first instance as per the offer/answer specs.
Paulo Borelli. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, February 02, 2006 11:31 AM To: [email protected] Subject: Re: [Sip-implementors] Offer/answer retransmission OK? You cannot Send SDP(answer) in a response that is not reliable, for the simple reason you don't get the Acknowledgement whether the offerer has received it or not. The offer/answer model in SIP mandates that the answer be received reliably. This is taken care by using reliable provisional response or by sending ACK to 2XX response. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andreas Byström Sent: Thursday, February 02, 2006 6:02 PM To: [email protected] Subject: [Sip-implementors] Offer/answer retransmission OK? Hi I have two SDP questions: 1. Is it (according to RFCs) ok to send the SDP answer in a SIP response that is not reliable? I.e, is it ok to send SDP in 180 (that is not using PRACK) 2. If sent in 180 (as above) is it then ok to send the exact same response again in 200 OK? Is it allowed to respond to a offer in two different mesages (first 180 and then 200). Does it matter if 180 is reliable (say that PRACK is used for 180, still ok to send SDP answer in 200?) Regards, // Andreas _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
