I am working to try and solve an echo problem on a CM4.1 installation. Gateway is 2811 running 12.4(1r). I had echo cancellation enabled and was turning the coverage up a step at a time. Was also trying attenuation. Now when I "echo-cancel enable", it just doesnt show up in the run-config.
Beneath voice-port 0/0/0:23 there is just nothing. I get no error messages, but the enable command won't stick. Ideas?