3CX Recording has both audio streams but caller and callee can't hear each other

[ebrowne_sts]

Hey,

We've been having this strange issue with one of our systems. The customer would call in and the call would connect but be silent. The agent can hear the customer but to customer cannot hear them. I tested a few times right before making this post and experienced the same. I play back recording and can verify both audio steams are present. Onsite phones are connected to 3CX via SBC so what could be causing this issue?

 

[TheodorosG_3CX]

So this is on the endpoint from the provider side, maybe you need to check with the provider as well.