I am looking for an asterisk consultant in San Francisco who can do some onsite work, we are having echoing problems that remote consultants can’t seem to fix.
If you can tell us about your echo we might be able to help you. What interface(s) are you using? What does your zapata.conf file look like?
I just installed a system using a TDM2400e and the echo module was crap. After I removed it all of my problems went away.