U
5
8
4
4
7
4
5
5
I
0800 145 6789* or go to bt.com/producthelp 
66
]
U
w
|
Å
U
V
|
z
w
}
z
T
U
V
ý
}
u
U
of handset to your BT4500 
base
Y
Ä
Ç
È
}
}
z
o register another 
make of handset (i.e. not a 
BT4500 handset) to your 
BT4500 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 65). 
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.
C
a
egister a handset
^
_
 Select 
Menu, scroll 
5
4
â
Settings and 
press 
OK.
2. Press 
5
4
â
Registration and press OK.
3. Press 
5
4
â
Deregister HS and press OK.
4. Press 
5
4
â
7
7
4
5
â
9
5
7
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.
 
!
"
#
$
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+
,