>>So when we get a 481 in response to a BYE it will only terminate >>the usage associated with that BYE transaction. >>Which in our case will be the subscription usage.
no. >>"Destroys Usage The error destroys the usage, but not the dialog. >> Any other usages sharing this dialog are not affected." >>So I think since INVITE usage is the dialog creating usage,which is >>not related to the BYE message it will be un-affected. The text you quoted says nothing about which usage was created first. I think you are confusing the meaning of "last usage". "Last usage" means the "last remaining usage", not "last created". Also, BYE is ONLY related to INVITE usage. BYE is not defined for any other usage. Regards, Attila -----Original Message----- From: shamik.s...@wipro.com [mailto:shamik.s...@wipro.com] Sent: 16 April 2009 14:45 To: br...@broadsoft.com; Attila Sipos Cc: sip-implementors@lists.cs.columbia.edu Subject: RE: [Sip-implementors] BYE after SUBSCRIBE? Hi Brett, In section 4 it is said that " Dialogs come into existence along with their first usage. Dialogs terminate when their last usage is destroyed. The messages that create and destroy usages vary per usage. This section provides a high-level categorization of those messages. The section does not attempt to explore the REGISTER pseudo-dialog." So since the invite transaction creates this dialog so this will be the first and the founding usage of this dialogue. When we send the subscription request and gets back the 200OK the subscribe usage is created which is the second usage within the initial invite dialogue. So when we get a 481 in response to a BYE it will only terminate the usage associated with that BYE transaction. Which in our case will be the subscription usage. However if the INVITE usage is destroyed after the esatblishment of the subscription usage then the subscription usage will be the last usage and its termination will terminate the dialog. Otherwise,the initial INVITE transaction will be unaffected. It is said that 481 terminate the usage "Destroys Usage The error destroys the usage, but not the dialog. Any other usages sharing this dialog are not affected." So I think since INVITE usage is the dialog creating usage,which is not related to the BYE message it will be un-affected. Please let me know if my thoughts are wrong. Thanks and regards, Shamik Saha Project Engineer Voice Protocols Cell : +91-9886704155 -----Original Message----- From: Brett Tate [mailto:br...@broadsoft.com] Sent: Thursday, April 16, 2009 6:56 PM To: Shamik Saha (WT01 - Telecom Equipment) Cc: sip-implementors@lists.cs.columbia.edu Subject: RE: [Sip-implementors] BYE after SUBSCRIBE? Shamik, Please reread section 4 concerning the distinction between INVITE usage and SUBSCRIBE usage. Per tables 1 and 2, BYE 481 applies to the INVITE usage. -brett > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip- > implementors-boun...@lists.cs.columbia.edu] On Behalf Of > shamik.s...@wipro.com > Sent: Thursday, April 16, 2009 9:12 AM > To: attila.si...@vegastream.com > Cc: sip-implementors@lists.cs.columbia.edu > Subject: Re: [Sip-implementors] BYE after SUBSCRIBE? > > But in RFC 5057 page 9,it is said that a 481 will terminate the > SUBSCRIPTION usage but the INVITE usage dialogue within which the > subscription is established will be un-affected. 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 Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
