Greetings! I'm curious what is the expected behaviour of both proxies and callee endpoint UAS in the following situation. Does 486 busy ever clear up (in both ringing phone and proxy) if nobody ever picks up.
SIP phone A sends an INVITE to SIP phone C (through proxy B). SIP phone C starts ringing (180 ringing is send from C->B, then forwarded from B->A). Now SIP phone A dies and never comes back. Furthermore, nobody is available to answer C, so it keeps ringing, and ringing, and ringing...... Now if SIP Phone A comes back up and calls C again (through B), we will get a 486 busy. The question is when will the 486 busy clear up? Is the proxy and C suppose to clear up after a time and cancel the call? (What if A called C directly.... since A died, who would CANCEL the call on C?) Here is why I am asking. We have a test tool that sends INVITEs, then CANCELs the call after getting a 18x. Nobody is there to answer the ringing phone, as we are planning on it being CANCEL'ed. However, there are occasionally situations where the INVITE can't be canceled. Hence, when we issue subsequent INVITEs we get the 486 response. We need to know if that 486 will clear up, and how that happens. Thanks, -Russ _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
