Hi all, I am learning Freeswitch webrtc, and setup an environment with demo configuration as below. 1. User 1008 is logged in from browser with Verto. 2. User 1000 is logged in from X-Lite SIP phone. "sofia status profile internal reg" only shows 1000. 1000 makes a call to 1008, 1008 answers the call, and call is established between browser and X-Lite. The following is from freeswitch log, 2662 7fbee0e2-b766-11e8-b3d6-f9bb4821b253 2018-09-13 15:05:49.296720 [NOTICE] switch_ivr_originate.c:2868 Cannot create outgoing channel of type [error] cause: [USER_NOT_REGISTERED] 2663 7fc69cd8-b766-11e8-b3f8-f9bb4821b253 2018-09-13 15:05:49.296720 [DEBUG] mod_rtc.c:392 () State Change CS_NEW -> CS_INIT I am wondering how mod_verto is invoked to handle the incoming call. Can someone explain please? Many thanks, /Kaiduan