call to PBX no audio

[Widerawo]

Hi,

I'm new here!
And I need some help.
I have setup the 3cx PBX V10+sp1.
The server is standing inside DMZ zone.
On the Firewall I have forwarded tcp and udp port from port 4000-2000.
I have configured one voip provider. (3StarsNet)
And one extension (101) what is connect with a Grandstream (HT503) to my network.

When I call with my mobile to my 3Starsnet number. It's ring
And I can speak an listen on the phone what is connected to my system perfect.
But on my mobile I can't hear nothing.

What I need to do...?
Please help

Kind regards,

Wolf

 

[Widerawo]

It' not port 4000-2000 but
4000-20000

Kind regards

Wolf

 

[davidbenwell]

Hi, from the 3CX Console, can you go to >> Settings / Firewall Checker and run it and post the output back here for us to look at?