12connect support

[zedatel]

Hello,

I have problem with my 3CX phone system and the provider 12connect.

When i make an inbound call, the call gets disconnected after 30 seconds because there was no "ACK" received from 12connect. When i make
an outbound call there is no problem.

Someone posted the 12connect config here and stated there where no problems. I am not the
only one with this problem because multiple people posted on the board with the statement they get cut off after 30 seconds. I think same problem
different provider.

specs:

3CX software V7
STUN disabled
static external IP address
custom source ID host part with my external IP address

When i enter the number directly into my 3CX VoIP phone client there is no "ACK" coming back either but i don't get disconnected.

Maybe someone can help me with this. Thanks in advance!

 

[zedatel]

I found the solution to my own problem:

The settings need to be changed for my extensions to:

Extension settings --> other --> disable "support Re-invite"

This needs to be done for all extensions, that did the trick.