2010/3/27 Iñaki Baz Castillo <[email protected]>: > Then, shouldn't 480 be mapped to 19? In this way it would be a 1:1 > relationship. > Also, 480 doesn't mean the same as 408 (even if both are the worst SIP > status codes as they are vaguely defined and are ambiguous).
Also note what the section 7.2.8 of RFC 3398 says: -------------------------------------------------- 7.2.8 Timer T9 Expires The expiry of this timer (which is not used in all networks) signifies that an ANM has not arrived a significant period of time after alerting began (with the transmission of an ACM) for this call. Usually, this means that the callee's terminal has been alerted for many rings but has not been answered. It may also occur in interworking cases when the network is playing a status announcement (such as one indicating that a number is not in service) that has cycled several times. Whatever the cause of the protracted incomplete call, when this timer expires the call MUST be released. All of the gateway resources related to the media path SHOULD be released. A '480 Temporarily Unavailable' response code SHOULD be sent to the SIP network, and an REL message with cause value 19 (no answer from the user) SHOULD be sent to the ISUP network. The PSTN can be expected to respond with an RLC and the SIP network to respond with an ACK indicating that the release sequence has been completed. -------------------------------------------------- -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
