If you need some help, call us on 0800 145 6789* or go to bt.com/producthelp 
Using additional handsets 51
Registering another make  
of handset to your BT4000 
base
If you want to register another 
make of handset (i.e. not a 
BT4000 handset) to your 
BT4000 base you will need 
to follow the Registration 
instructions that came with 
the handset first and then 
continue with the base part of 
the registration procedure (as 
shown in point 4 on page 50). 
Please note that registering 
other types of handset will only 
provide limited compatibility 
i.e. you may only be able to 
make and receive calls on the 
additional handset.
De-register a handset
1. Select 
Menu, scroll   to display Settings and 
press 
OK.
2. Press 
 to display Registration and press OK.
3. Press 
 to display Deregister HS and press OK.
4. Press 
 or   to display the handset you wish to 
de-register and press 
OK.
5. If the system PIN is not 0000 then you will be 
prompted to enter it, then select 
OK. If it is 0000, 
you will continue straight to point 6.
6. The display will show will show 
Please wait…. and 
once successful 
De-registered.
1662 BT4000 UG [3].indd   51 09/04/2013   15:03