Solved Suddenly Customers Cannot Hear Agents but Agents can Hear them

[mlawgeorge]

Hello Team,

Our 3CX server has been working very well running the latest version 16 on windows server, but Just out of the blue if you call extension to extension the person who has initiated the call will hear you but the called party will not hear anything

This is same case we are having with customers, The voice is one way it's only the person who has initiated the call will hear the other party for example when I call a customer I can hear the customer but they are not in position to hear me

 

[leejor]

Locally hosted, STUN used, SBC...?

https://www.3cx.com/community/threads/information-to-provide-when-requesting-help.67558/

My first guess, would be a piece of network hardware, given the fact that one way audio changes, depending on who initiates the call.

 

[mlawgeorge]

The issue was solved, We figured that there was another process in the server using port 5061 after running the firewall checker.

 

[VasilisV_3CX]

Great to hear @[email protected]. I'll close the thread now. Thank you for updating.