We use IP phones and we connect directly to our other office using a T1 line on a cisco 1941 router. On the one side the sound quality is perfect. On the other side the sound has a echo. Is there commands that I can do to eliminate.
this is what I have
ip address 10.1.100.1 255.255.255.0
service-module t1 clock source internal
service-module t1 timeslots 1-24
I am using a cisco 1941 with a hwic dsu/csu inteface card.