Few comments inline... Thanks, Nataraju A B ESN: 6-877-8567 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of Henrik Antonsson > Sent: Thursday, May 29, 2008 5:58 PM > To: [email protected] > Subject: [Sip-implementors] 1xx response for a non-existing > transaction? > > Hi > > I've read some specifications on SIP but I can't find > anything about what should happend if a client sends a 1xx to > the server when the transaction no longer exists. > My scenario is that the INVITE from A to B is queued in the > network, the server tries and then timeout and sending A a > 408 response. At this state the transaction no longer exists > a suppose. When eventually B receives the INVITE (as it was > buffered in the network) how does B find out that the > transaction does not exist? B sends 100 TRYING and 180 > RINGING and 200 OK if the user accepts. Do I have to wait for > the timeout as the there will be no ACK from the server from > the 200 OK or should the server respond with 481 or any other > code when B sends 1xx codes? > [ABN] I am not sure I understood your question correctly. Here are few pointers in the similar lines...
[ABN] client would never send out 1xx response in any cases. Till the server receives INVITE, where is question waiting for INVITE txn. The server side processing starts only when the INVITE message is received. 481 would never be applicable for initial (dialog creating) INVITE transaction. It would be applicable for mid dialog requests, for instance BYE, UPDATE, PRACK requests after the dialog is created. If the issue was INV, 200, and followed no ACK reply. Then the expected behavior is to terminate the call with BYE/200 transaction. The call should be terminated, whether 481/200 received for BYE request. > Thanks > anton > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > Please do not print this email unless it is absolutely necessary. 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
