At the base station press, Then, Again – BT DECTfax User Manual
Page 9: At the handset press, Then use the, Press, The telephone icon flashes in the display

Want to register a handset to more than one
base station.
Want to allocate a handset with a handset
number other than the next sequential one.
1
At the base station press
Function
, then
8
,
then
8
, then
Function
again.
2
At the handset press
OK
then
9
, then use the
▲
and
▼
buttons to scroll to the first empty
location, indicated by a line of dashes in the
display.
3
Press
OK
. The telephone icon flashes in the
display.
4
After a few seconds the display shows four
dashes (
- - - - ) to prompt you to enter the
handset security code
5
Enter the code that is on the base station,
either 0000 or whatever you have changed
it to.
6
Press
OK
and the display will show the
available handset numbers (
1-4
).
7
Press the number you want on the keypad -
the display will show this number to indicate
that the handset is registered.
9
Setting up
TU
V
8
TU
V
8
WX
Y
Z
9