I do not think the RFC stipulates any sequence. What you are doing is valid. May be you can make the 183 reliable and see if the phones support it.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Volety, Suryaprakash Rao (Prakash) Sent: Wednesday, January 22, 2003 9:49 PM To: '[EMAIL PROTECTED]' Subject: [Sip-implementors] 18x response sequence I bumped into this problem the other day relating to sequencing of 180 Ringing and 183 Session Progress responses from UAS. In the following call flow (with either Cisco 7960 or Pingtel) User Agent Client is ignoring 183 and thereby failing to provide early media. SIP UAC UAS ---INVITE----> .... <----------------- 100 Trying <--------------- 180 Ringing <--------------- 183 Session Progress However if we send , from UAS, 183 followed by and 180 responses , then UAC is providing early media. Can someone tell me what should be the exact sequence of responses that RFC stipulates ? Thanks, Prakash _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
