Problem between RED and XG - transmission of the voice


we have a problem with the transmission of the voice on our IP telephones between the XG and the SD-RED 20.

The connection can be established (it rings and you can pick up the receiver), but nothing can be heard.

The RED is located in the network

The XG in the network

The telephone system has the

Otherwise all traffic between the XG and the RED works.

Do any routes have to be set here in addition to the firewall roles?

Thank you very much and best regards ...


Edited TAGs
[edited by: emmosophos at 10:24 PM (GMT -7) on 29 Apr 2021]
Parents Reply
  • Hi there,

    I just installed a RED device yesterday for a client, the scenario you described above was exactly the same issue I had.  The RED network could communicate with the client's PBX, I could ping the PBX, the phone would register & ring but no audio.

    in my case...  After some diag's and packet sniffing, the issue wasn't with the RED/XG, it was the PBX.  I had to enter in the subnet of the RED device as an internal network in the PBX config.

    Just a thought...  could be same issue.  Check your PBX.

    In my case this client uses a FortiVoice PBX, and this setting was under Phone System - Advanced Settings - SIP - Advanced Setting - Internal Network.