Call or Registration failed. sip: Request Timeout (408)

[79schultz]

For the last week we have had this situation where a salesman will be on a call and they can hear the customer as clear as day, but the customer can't hear them. I am not an expert in 3CX, I'm learning. I upgraded to Update 5 on 3/25/25 so I don't believe it is related to the upgrade. We have this same setup at our other 2 locations and neither of them are having this issue, only this one location.

 

[bitn2]

Your screenshot hasnt anything todo with this problem.. Firewallcheck is green?

 

[79schultz]

I included that second screenshot so people could see what version we are running.

No, the firewall check is red, but I can't run that during business hours, too many phone calls coming in. I'll have to run that after hours at some point.

 

[bitn2]

I included that second screenshot so people could see what version we are running.

No, the firewall check is red, but I can't run that during business hours, too many phone calls coming in. I'll have to run that after hours at some point.

Than you need to fix your firewall first and check your calls after that. That will be your problem why you have sound problems.