Panasonic DBS 824 Installation Manual page 263

Extension Numbers
FF3
Clearing An Extension Number.
Clearing an extension port of its extension
number
does not return the number to a default value
-- instead, the port is
inoperative until an extension number is reassigned to it and the phone is
unplugged from the system, then plugged back in.
Re-Assigning An Extension Number. An extension number can be changed
without clearing the old one first -- simply overwrite the old extension
number using this program address. (The system will recognize the new
extension number without requiring the phone to be unplugged and then
plugged back in afterwards.)
Assigning An Extension Number Already In
Use. If an extension number is
already assigned to a port, and you assign the same number to another port,
the system will automatically clear the first port of the extension number. The
first port would then have to be re-assigned a new extension number, and the
phone unplugged and then plugged back in again.
Changing The Extension Name.
The assignment or re-assignment of
extension numbers does not change the extension name. To change the
extension name, use program address FF6 l# (ExtPort)# CONF (Name)#.
3-4 DBS 824-l O-400 Issued 3/l /95