Any DX80's you have with the letter N as the letter code in the serial number, is likely to have a problem where the audio on the phones goes dead during a call for 6 to 10 seconds and then comes back. This is an intermittant trouble that many people ignore. Comdial will repair the cabinet if you call for an RMA #.
I also learned that there has been some trouble with the battery that holds up the programming during a loss of power. If you lose some, or all of the programmed database after a power failure or reboot, replace the battery. The number is CR2032. There is no letter or date code associated with the battery issue, could be any of them.
mark


[This message has been edited by markk (edited September 16, 2004).]