[Asterisk-Users] Cisco 7940G/7960G SIP phones local echo on * box.

[Tom]

Our new * server with Cisco SIP phones is now working pretty well.  But we 
still have one problem that has not been resolved.

The Cisco SIP phones have a consistent echo.  It sounds like about a 500ms 
delay.  This echo is not heard from the POTS side.  It is heard when 
calling another SIP extension in our office.  We are running 6.3 firmware 
on the phones.

Any suggestions would be appreciated.

Many thanks,

Tom