Echo on a digital phone (analog for that matter as well) is usually intentionally created, but it shouldn't be noticeable. It's called comfort noise, so that you can hear yourself talking in the earpiece. Tests have shown that people who can't hear themselves in the earpiece think it's broken.
I'd say this probably isn't your problem. My first guess is the gain on the analog trunk lines are too high. -- RFC 1149 Compliant. FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]