WebMeeting Dial-In phone users can't hear anything

[Jonathan Price]

Hello,

We have recently set up a 3CX environment. We are running version 16.0.1.73.

Everything is generally working, internal users can call each other, and inbound/outbound calls work externally too. We have also tested audio-only conferences and both internal and external users can hear each other fine.

The one issue we're having is with video conferences / WebMeetings. Users are able to join on a PC and see and hear each other fine. However, if a user dials in to the DDI in the meeting invitation they briefly hear the holding music and then hear silence. Nobody else in the webmeeting is able to hear what the phone user is saying and vice versa.

We aren't getting issues with the firewall checker and I have tried watching the firewall logs in real time as we test this and aren't seeing any blocked packets, but we don't want to necessarily rule something network related out yet.

Does anybody have any suggestions as to things we could try in order to get this feature working? Once it's up and running we should be able to replace WebEx altogether.

Thanks,
Jonathan.

 

[LeonidasG_3CX]

There's a UDP port range that needs to be opened on the PBX/Firewall side for this.

Take a look at the following links:

• https://www.3cx.com/docs/ports/
• https://www.3cx.com/community/threads/3cx-phone-system-audio-ports-increased.60235/