Hi, It would seem that, when using the pjsip_evsub object in the server rolse, the TIMER_TYPE_UAS_TIMEOUT timer does not get set when accepting the initial SUBSCRIBE. Rather it gets set initially on the first refreshing SUBSCRIBE and updated on each subsequent subscribe. Now I'm not 100% sure about this, as I'm not using the pjsip_evsub_accept() method, but I cannot find anything in there which should trigger setup of the timer. Ruud Klaver AG Projects