Our oganization has implemented a Cisco AVVID solution. We are having echo problems with certain branch locations. The problem exists for both internal and external calls. We've got point-to-point T1s for each location and we're using codec g711ulaw which is uncompressed voice. I've been troubleshooting the issue by applying echo-cancellation on the PRI interfaces which hasn't changed the performance. Since the problem aslo exists for internal calls I believe the problem isn't with the PRI. What steps can I take to troubleshoot this probem further? Any suggestions on what the problem may be?
Call Manager version: 3.3(2)
Phone type: 7960
Switch type: Cisco 3550 with inline power