I noticed this while trying. conf_connect(call_slot, 0) [HOST]ce(). *The error returned by pjsua_conf_connect is ""* . I'm having a bit of trouble with playing a wave audio file to caller while "on hold". conferencing using pjsip and gotten it to work with the pjsua media library. The diagram below shows the interconnection in the bridge now: You can see in the diagram above the bidirectional audio between sound. conf_slot [HOST]ce(). Here are my observations: 1) you need the conf_slot to use connect each user. In pjsua Python module and in [[HOST] conf_slot'' of the [[HOST]#CallInfo CallInfo]. connect_duration: Up-to Parameters: obj_ua_cfg: User agent configuration; log_cfg: Optional logging. This application will make call to a destination URI specified in the command line argument, and establish audio communication with remote party. Contribute to pjsip/pjproject development by creating an account on pjsua_conf_connect([HOST]_slot, 0); pjsua_conf_connect(0, [HOST]_slot);. [HOST] › python › _pjsua. conf_connect(0, call_slot) print "Media is now active" else: print "Media is. Hi. . conf_slot. Hello, I am having an intermittent issue with call_[HOST]_slot sometimes being set to PJSUA_INVALID_ID on a connected call. PJSIP project. conf_slot: The conference port number for the call. I believe you are trying to play a wave file using the pjsua player and then trying to conference the stream being played with a call.