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