I was just about to start a thread asking about , I assume, the same problem.
On the receiving end of VOX I am getting like a loopback recording. It is happening regularly and seems to have just started after we went back to the original ISP. Someone can say "check 6" and I get "check 6" "check 6" "check 6" over and over. On a lot of these occasions it freezes game play temporarily.