Hello Everybody, I would like to play a wav-file to a caller once he was put "on-hold" with pjsua_call_set_hold(callID, NULL). For that purpose I created a player with pjsua_player_create() and connected it's conf-port to the one of the holding call (as a response to the triggered on_call_media_state() callback). Unfortunately, this does not work - the file is not heard by the holding caller. However, the player-mechanism works fine - that is verified: The wav-file can be heard beautifully by the caller, when the call is not on hold. What is the suggested approach to implement music-on-hold with pjsua? Thank you very much in advance! Cheers, -Thomas