Hello. I am using Freepbx 14.0.16 with WebRTC module 18.104.22.168
webRTC users can make and receive calls. The one issue is that when a call is placed there is no “ringing sound” before the call is answered. Just dead air. After sip debugging I found that sip event 183 session progress is being received by the PBX. I believe this is the event that would trigger ringing prior to call pickup (There is also a sip event 180 ringing but I think 183 is a more advanced message?) Anyways the sip event 183 is never passed to the webRTC client.
For the WebRTC client there is a sip event when the call is placed but no event from then on until the call is answered.
All normal sip phones connected to the PBX operate properly and on those sip devices you do hear ringing so I do believe otherwise all is good. Possibly a WebRTC issue? I can see no settings to tweak the WebRTC extensions. I did try progressinband for the outgoing sip trunk to the provider but this made no difference. I also tried forcing a ring sound for outbound calls on the sip trunk with r added to the dial string but no difference there either.
Here is the WebRTC sip config if that helps. Thanks for any assistance/ideas.