Video calls not working from FreePBX to Grandstream UCM by SIP Trunk

General Help
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1

Hi. I have a GDS3710 Doorbell and a GXV3240 SIP phone. Video calls work great when both devices are registered on FreePBX. I have a grandstream UCM PBX and video calls work fine when the phones are connected directly to it. Right now I have a peer sip trunk setup with the grandstream UCM PBX and FreePBX. I can place phone calls fine between the 2 and the audio works but I cant seem to make a video call. The extensions are using PJSIP and I have a PJSIP trunk. Does anyone know off hand as to what could be causing this? I will have to upload my packet capture results a little bit later.

2

Maybe a codec mismatch? Probably the end devices understand each other when on the same PBX only, given that video is passthrough.

3

Here is what the call flow looks like in Wireshark.

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192.168.21.1 is the Grandstream UCM and 192.168.21.213 is FreePBX
192.168.21.203 is the video phone

4

callee has no offers video codec(H264)?

5

Here is my call flow showing the video Door Bell (IP:192.168.21.212) (Connected to FreePBX) going to
FreePBX (192.168.21.213) then from FreePBX to Grandstream (192.168.21.1) to the video phone (192.168.21.203)

I have a custom extension 6331 that dials extension 550@UCM6280 (video phone extension @ trunk name of grandstream pbx).

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Here is my extensions_custom.conf for FreePBX

[phones]
exten => 550,1,Dial(PJSIP/550@UCM6208,60,m(Cisco)b(callHandler^callee_handler1^1))
exten => 550,2,Hangup

exten => 6332,1,Dial(PJSIP/550@UCM6208,60,m(Cisco)b(callHandler^callee_handler2^1))
exten => 6332,2,Hangup

[macro-opendoor1]
exten => s,1,System(HIDE THIS INFORMATION)
exten => s,n,MacroExit

[macro-opendoor2]
exten => s,1,System(HIDE THIS INFORMATION)
exten => s,n,MacroExit

[callHandler]
exten => callee_handler1,1,NoOp()
same => n,Set(__DYNAMIC_FEATURES=Door1)
same => n,Return()

exten => callee_handler2,1,NoOp()
same => n,Set(__DYNAMIC_FEATURES=Door2)
same => n,Return()
6

Found the issue.In my pjsip.endpoint.conf my trunk (UCM6208) didn’t have codec H264 listed. I added that and now when the call gets routed from FreePBX through the trunk we are all good! Hope this can help someone else too!

7

Well if it works with Asterisk you might want to file a feature request to get it in the GUI

8

Hey good idea. I just checked and noticed that a feature request is already in there from 2017(FREEPBX-15853). I added my vote.

1 Like
9

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