We are facing two way audio issue between the cisco 6921 IP phones. previously it was working. one of our remote site in Ukraine has shifted their office physically. Since the shifting is done, we are facing audio issue. phone rings but when recieved no audio is audible on both ends( one end is Ukraine office and other end is India). Kindly suggest the trouble shooting steps.
As this will be a new data circuit my first step would be to test for packet loss across the circuit. If this is good then try a softphone from a laptop directly into the router progressing into the network.
2 way rtp failure is nearly always a network issue but check you are allowing the new subnet as part of the ip trusted devices on your voice routers.
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