I am having issue where users report some echo on the IP phones every now and then that lasts the whole call. The echo they hear is their voice back on the IP Phone. The outside party does not hear echo.
The T1 PRI controller is clean, no errors and the router network-clock is set to use the PRI. We have tried setting the network-clock to defaults to use backplane and that had no change.
CME is on a 2811 with IOS 12.4(6)XE2
input gain -3
output attenuation 3
Here is phoneload. Should I update these?
load 7914 S00104000100
load 7941 SCCP41.8-0-4SR2S.loads
load 7961 SCCP41.8-0-4SR2S.loads