> 1. If UA is subscribing to MWI (or) reg event.. > when it receivesa immediately NTY with subscription > state as : Terminated should the UA re-retry to re-subscribe? > As per rfc's/specs in which cases does a UE does not re-try to re- > subscribe. (Error codes (or) NTY- subscription state)
See RFC 6665 section 4.1.3. "If a reason code is present, the client should behave as described below. If no reason code or an unknown reason code is present, the client MAY attempt to re-subscribe at any time (unless a "retry-after" parameter is present, in which case the client SHOULD NOT attempt re-subscription until after the number of seconds specified by the "retry-after" parameter)." > 2. when a UE send session-timer (or) any things in > Supported: header in INVITE. should it include that > header in PRACK (or) Re-INVITE send by the same UA? > (In This case Target also supports session-timer and > it is working between UA-UA. but want to know for > mid-call signalling) and also reference in rfc's. As indicated within RFC 4028 section 4, the Session-Expires stuff is only negotiated (activated/deactivated) using UPDATE, INVITE, and re-INVITE. However, RFC 4028 section 7.1 does indicate the following. "A UAC that supports the session timer extension defined here MUST include a Supported header field in each request (except ACK), listing the option tag 'timer' [2]. It MUST do so even if the UAC is not requesting usage of the session timer for this session." -- This email is intended solely for the person or entity to which it is addressed and may contain confidential and/or privileged information. If you are not the intended recipient and have received this email in error, please notify BroadSoft, Inc. immediately by replying to this message, and destroy all copies of this message, along with any attachment, prior to reading, distributing or copying it. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
