Snom DX muted after update V20

[ArtsCom]

Hello to everyone,
after updating from V18 to V20, everything works fine except that the phones (Snom DX series) are silent (in both directions) when receiving calls from outside, while internal calls are audible. Even when answering from the 3CX app, the phones are silent.

Any help will be really appreciated

 

[OlegR_3CX]

Hi there.
Can you please advise if your firewall check can pass the test if you re-run it?

 

[ArtsCom]

• resolving 'stun-eu.3cx.com'... done
• resolving 'stun2.3cx.com'... done
• resolving 'stun3.3cx.com'... done
• resolving 'sip-alg-detector.3cx.com'... done
• testing 3CX PhoneSystem 01 SIP Server... done
  • stopping service... done
  • detecting SIP ALG... not detected
  • testing port 5060... done
  • starting service... done
• testing 3CX PhoneSystem Media Server... done
  • stopping service... done
  • testing port 5090... done
  • testing ports [9000..9398]... done
    • {...}
  • starting service... done

 

[ArtsCom]

 

[ArtsCom]

Goodmorning Community,
does someone have a solution for this issue?

Update: outbound calls are ok, both can listen

 

[OlegR_3CX]

You will need to check your traffic SIP negotiation (Contacts headers, SDP part etc) as then filter that traffic in Wireshark, as it can be a networking issue.