The ACH design team has come to the conclusion not to introduce an additional condition for silent ignore (i.e., over and above the 4 conditions already identified: busy, do not disturb, local reject and global reject). Basically there are two ways a UA could handle such a request from the user. First, it could pretend the call continues to alert the user (while suppressing any indications to the user) and waiting for timeout before sending a 487. ACH at the proxy might result in forwarding to voicemail, for example, on receipt of 487. Second, if the UA wants to send an earlier response, local reject seems a reasonably good fit. There did not seem to be justification for defining a further response code with fairly similar semantics.
John _______________________________________________ BLISS mailing list [email protected] https://www.ietf.org/mailman/listinfo/bliss
