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If you need some help, call us on 0800 145 6789 or go to bt.com/bt3110
Registering an additional handset
If you bought your BT3110 as 
a multipack, all the handsets 
that came with it will already be 
registered to the base.
If you buy new handsets separately, 
you’ll need to register them before 
you can use them. You can register 
up to four handsets.
Once the registration process has 
started, you need to complete it 
within two minutes. If you run out 
of time you can start again.
Tip
You can register up to four GAP 
compliant handsets to your BT3110 
base to extend your phone system, 
without needing to install telephone 
extension sockets for each new 
phone.
If registration isn’t successful the 
rsttime,pleasetryagainincase
the base registration period ran out 
of time. 
If there are already four handsets 
registered to the base, the 
registration will fail. You must  
de-register another handset before 
you can register the new one (see 
next page).
Using additional handsets
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.
At the base:
1.
 Press and hold
 
 for 5 seconds 
until you hear a beep. You now have 
90 seconds to register a handset.
At the handset:
2. If the handset isn’t registered to 
a base, press 
 
and then enter the 
4 digit PIN (default is 0000) and 
press 
. 
Or, if the handset is already 
registered to a base, press 
 
and 
scroll
 
 to ADVANCED SET and 
press 
.
3. Press
 
 until REGISTER is 
displayed. Press 
.
4.You’llbeaskedtoconrmyour
PIN. Type in your 4 digit PIN (default 
is 0000) and then press 
. You 
will hear a beep if registration 
is successful and the handset is 
automatically assigned an available 
handset number.
De-registering a handset
You’ll need to use one handset to 
de-register another. You can’t  
de-register the handset you’re using.