Using the phone
If you need some help, call us on 0800 145 6789* or go to bt.com/producthelp 
22
You can also press   to 
switch between calls.
Out of range warning 
When the handset is out of 
range of the base, the display 
will show Searching for 
base…, the backlight will turn 
up to 100% to indicate the alert 
message and you will hear a 
warning tone. After 60 seconds 
the display will show No base 
link. Check base. You need 
to move back within range of 
the base station.
If you move out of range when 
you’re on a call, you’ll lose your 
connection. The handset will 
automatically re-connect to 
the base when you move back 
within range.
Call Waiting 
If you’ve got a call waiting service and it is switched 
on, your phone will alert you to a second incoming 
call if you’re already engaged on an external call.
To switch your call waiting service on or off, see page 47. 
1. You’ll hear the call waiting tone and if you also have 
caller display the display will show the number of 
the caller, or the name if it matches an entry in 
your contacts.
2. Select 
Switch by pressing the Left option button 
to answer the new call and your first caller is put 
on hold. 
3. Select 
Switch to toggle between the two callers. 
4. Press 
 to hang up the current call. 
Mute
During a call, you can talk to someone nearby 
without your caller hearing.
1. During a call, select 
Mute by pressing the Right 
option button. The display shows 
Call muted and 
your caller can’t hear you.
2. Select 
Unmute to return to your caller.
1662 BT4000 UG [3].indd   22 09/04/2013   15:03