Panasonic DBS-2.3-400 Programming Manual page 324

Chapter 3. Extension Programming (FF3)
Restrictions. Phone settings cannot be exchanged between digital and
analog (SLT) ports.
Page 3-50
6. To return extension 103 to service, disconnect then reconnect the
extension cable. When extension 103 is returned to service, it will
have the program settings of extension 102.
DBS Manual - Revised April 2000
Section 400-Programming
DBS-2.3/9.2-400