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

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