Hello, Does FreeSWITCH support receiving calls that contain only a video component? (I am trying to use FreeSWITCH to distribute WebRTC screenshare streams to users. It works fine with audio and video) The INVITE looks like: INVITE sip:1273936153_290033102@a.b.c.d SIP/2.0 Via: SIP/2.0/UDP 0.0.0.0:7071;branch=z9hG4bK801683;rport Via: SIP/2.0/TCP 127.0.0.1:7071;branch=z9hG4bKllc4a6rbqb7886s43nhl Via: SIP/2.0/TCP 1q582tjutlhh.invalid;branch=z9hG4bK7896356 max-forwards: 69 To: <sip:1273936153_290033102@a.b.c.d> From: "Rich" <sip:rscreene@gmail.com>;tag=mgu8fejfq8 call-id: llc4a6rbqb7886s43nhl CSeq: 7243 INVITE Contact: <sip:127.0.0.1:7071;transport=tcp> allow: ACK,CANCEL,BYE,OPTIONS,INVITE,MESSAGE supported: outbound user-agent: JsSIP 0.4.0-devel content-length: 1824 Content-Type: application/sdp v=0 o=- 4235676450597780712 2 IN IP4 127.0.0.1 s=- t=0 0 a=group:BUNDLE video a=msid-semantic: WMS 1dVXakoYx2u585L7G09f2C45EW8vP8c1XVcd m=video 34116 RTP/SAVPF 100 116 117 c=IN IP4 e.f.g.h a=rtcp:34116 IN IP4 e.f.g.h a=candidate:2668419503 1 udp 2122260223 192.168.47.203 56323 typ host generation 0 a=candidate:2668419503 2 udp 2122260223 192.168.47.203 56323 typ host generation 0 a=candidate:3515819359 1 tcp 1518280447 192.168.47.203 0 typ host generation 0 a=candidate:3515819359 2 tcp 1518280447 192.168.47.203 0 typ host generation 0 a=candidate:1401022012 1 udp 1686052607 w.x.y.z 7940 typ srflx raddr 192.168.47.203 rport 56323 generation 0 a=candidate:1401022012 2 udp 1686052607 w.x.y.z 7940 typ srflx raddr 192.168.47.203 rport 56323 generation 0 a=candidate:3671437516 1 udp 41885439 e.f.g.h 34116 typ relay raddr w.x.y.z rport 7940 generation 0 a=candidate:3671437516 2 udp 41885439 e.f.g.h 34116 typ relay raddr w.x.y.z rport 7940 generation 0 a=ice-ufrag:vD/mqbgKKKvb+vwg a=ice-pwd:xbg5CyTfAIQMCD3JTmjU9IGw a=ice-options:google-ice a=fingerprint:sha-256 E8:6D:CF:75:43:C6:D9:C6:90:8E:FD:15:CD:FC:86:A2:90:E6:A3:BE:CF:A1:12:64:60:2F:26:89:96:C0:16:18 a=setup:actpass a=mid:video a=extmap:2 urn:ietf:params:rtp-hdrext:toffset a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time a=sendrecv a=rtcp-mux a=rtpmap:100 VP8/90000 a=rtcp-fb:100 ccm fir a=rtcp-fb:100 nack a=rtcp-fb:100 nack pli a=rtcp-fb:100 goog-remb a=rtpmap:116 red/90000 a=rtpmap:117 ulpfec/90000 a=ssrc:2554093369 cname:L3M//yZhkStQCiOE a=ssrc:2554093369 msid:1dVXakoYx2u585L7G09f2C45EW8vP8c1XVcd 908bd517-4202-4348-a36d-f474090f3cc2 a=ssrc:2554093369 mslabel:1dVXakoYx2u585L7G09f2C45EW8vP8c1XVcd a=ssrc:2554093369 label:908bd517-4202-4348-a36d-f474090f3cc2 In the log I see the following message: 2014-05-02 13:35:43.267313 [DEBUG] switch_core_media.c:2223 No audio codec available And FreeSWITCH responds with: SIP/2.0 488 Not Acceptable Here Via: SIP/2.0/UDP 0.0.0.0:7071;branch=z9hG4bK801683;rport=7071;received=a.b.c.d Via: SIP/2.0/TCP 127.0.0.1:7071;branch=z9hG4bKllc4a6rbqb7886s43nhl Via: SIP/2.0/TCP 1q582tjutlhh.invalid;branch=z9hG4bK7896356 Max-Forwards: 692014-05-02 13:35:43.267313 [DEBUG] switch_core_state_machine.c:818 (sofia/external/rscreene@gmail.com) State REPORTING From: "Rich" <sip:rscreene@gmail.com>;tag=mgu8fejfq8 2014-05-02 13:35:43.267313 [DEBUG] switch_core_state_machine.c:102 sofia/external/rscreene@gmail.com Standard REPORTING, cause: INCOMPATIBLE_DESTINATION To: <sip:1273936153_290033102@a.b.c.d>;tag=H3e25S58vjNZQ call-id: llc4a6rbqb7886s43nhl 2014-05-02 13:35:43.267313 [DEBUG] switch_core_state_machine.c:818 (sofia/external/rscreene@gmail.com) State REPORTING going to sleep CSeq: 7243 INVITE User-Agent: Drum 1.0 Accept: application/sdp Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY Supported: timer, path, replaces Allow-Events: talk, hold, conference, refer Reason: Q.850;cause=88;text="INCOMPATIBLE_DESTINATION" Content-Length: 0 Remote-Party-ID: "1273936153_290033102" <sip:1273936153_290033102@a.b.c.d>;party=calling;privacy=off;screen=no Do I have to configure something to allow video-only calls? Or, is it a limitation of FreeSWITCH? If it is a limitation of FreeSWITCH is it easy to remove? Many thanks, Richard Richard Screene Senior Developer Drum Web Meetings +44 1273 936125 www.thisisdrum.com Drum is the collaboration solution by NetDev Ltd. Registered in England and Wales Company Number 04741258