RFC 4028 – Session Timers in the Session Initiation …
SIP Session Timer Feature – Oracle, Solved: CUBE SIP ‘session-expires’ missing at first …
3/28/2004 · The UAS would never be able to reduce the Session- Expires value. (3) Down below section 9 says: The UAS MUST NOT increase the value of the Session- Expires header field. Regarding the top most quotation we can assume that the UAS will always respond with the same value in Session- Expires and Min-SE headers.
11/25/2015 · No, session-expire is negotiated to 180 seconds. Only min-se is 90 sec which indicates that session-expires can not be lower than 90 seconds. Further session should be refreshed at the rate of half of session expriy timer which will becomse 90 sec (half of 180 sec). The SP makes an inbound call and is set to refresh as UAC.
In Simple Words : Min-se is the minimum value of timer , when UAS / UAC needs a session refresher. For ex: Let’s UAS has configured Min-Se as 200 sec. UAC sends an INVITE with session-expire with Value less than 200 sec (ex 100 sec). Then UAS sends 422 interval too small with Min-se value 200.
Two new header fields (Session-Expires and Min-SE) and a new response code (422) are defined. Session-Expires conveys the duration of the session, and Min-SE conveys the minimum allowed value for the session expiration. The 422 response code …
