Introduction
Your Caller Display 20 is designed
for ease of use and is made to the
high standards set by BT.
Thank you for choosing BT’s Caller
Display 20. You can expect many
years of quality service.
Please read the instructions
carefully before use and keep this
User Guide for future reference.
Hints and tips boxes
In this user guide we’ve included
helpful tips and useful notes.
They are shown in a white box
like this.
For your records
Date of purchase:
Place of purchase:
Serial number:
(see base of unit)
Purchase price:
(for warranty purposes, proof of
purchase is required, so please keep
your receipt)
At a glance
IMPORTANT
Check that your
Caller Display 20
is complete. When
you unpack it you
should have:
Caller
Display
20 with
telephone
line cord
attached
Screws
and wall
plugs for
wall
mounting
Wall-
mounting
bracket
✓
✓
✓
New call indicator
Flashes when calls have been
received since you last viewed
the calls list.
Dial button
Press to dial a number
shown on the display.
Display
Displays number information in
the calls list. Also shows battery
low warning for up to two weeks
before the batteries run out.
Scrolling buttons
Use to move up and
down through the
calls list. Also used to
adjust the contrast of
the display.
Clear button
Deletes numbers
stored in the calls list.
Installing your
Caller Display
20
Situating your
Caller Display 20
Position your Caller Display 20 close
enough to a phone socket for the
cables to reach.
Do not stand it on carpets or other
similar surfaces which might
generate fibres.
Do not cover or enclose the
machine. Allow a free flow of air to
its surfaces.
Your Caller Display 20 can be
wall-mounted. For instructions
on how to do this, see
‘Wall-
mounting’
.
Check your telephone
wall socket
If you do not have a modern-style
socket, call
Free
fone 0800
800
150
and ask for a BT engineer to
come and fit the correct type. This is
a chargeable service.
Using your
Caller Display
20
Using the calls list
When your Caller Display 20
receives a call, it automatically
stores the caller’s phone number
and other information in the ‘calls
list’, including the date and time of
the call.
It can store up to a maximum of 30
calls. To make room for new
incoming calls it discards old stored
numbers, starting with the oldest.
Your Caller Display 20 will store the
callers details whether the call has
been answered or not.
Setting the date
and time
The date and time will be set
automatically the first time you
receive a call, provided you have
subscribed to a Caller Display
service.
New calls indicator
The red ‘new calls’ indicator flashes
to tell you that new calls have been
received since you last checked the
calls list.
The number of new calls received
will also be displayed in the top right
hand corner of the screen.
Reading the calls list
Press the
f
button. This brings up
details of the most recent incoming
call.
Press the
f
button again to display
the next most recent call.
Continue pressing until the display
shows
END OF LIST
.
Press the
d
button at any time to
move up the list.
Adjusting the contrast
on the display
You can adjust the contrast on the
display to make the screen lighter or
darker.
Press
and hold
the
f
button.
Press the
d
button. The display
shows
LCD CONTRAST
.
Press the
d
button until the contrast
you want is available.
Dial
1
2
1
1
2
3
1
2
3
1
2
3
4
Insert batteries
Open the battery compartment at
the back of your Caller Display 20 by
pushing it upwards from the bottom
edge.
✱
You will need 4 x AAA alkaline
batteries.
Insert the batteries as shown in the
diagram then replace the lid.
It is important to maintain the
batteries in your Caller Display 20.
Without battery power the screen
showing callers’ details and other
display features will not work.
Battery low indication
When the batteries are nearing
the end of their useful life the
display will show a ‘battery low’
symbol. The same symbol will be
shown when the batteries are
completely flat.
Plug your Caller Display 20
into the wall socket
You will need 4 x AAA alkaline batteries.
Connecting a telephone to
your Caller Display 20
To connect a telephone to your
Caller Display 20, plug the
telephone line cord into the socket
on the back of the unit.
Alternatively, connect both the Caller
Display 20 and your telephone to the
wall socket via a doubler socket.
BT’s Caller Display
Service
Your Caller Display 20 receives and
displays caller information, which is
transmitted over the BT network. The
information will include the date and
time the call is received, and in most
cases the caller’s phone number.
To enable your Caller Display 20 to
show this information, you will first
have to subscribe to BT’s Caller
Display Service, details of which are
obtainable from BT on:
Free
fone 0800
800 150
for
residential customers.
Free
fone 0800
800 152
for
business customers.
Information displayed via
other UK networks
To enable your Caller Display 20 to
display information transmitted via
another UK network, you will first
have to subscribe to that network’s
own Caller Display service. Call
your service provider for more
information.
Your Caller Display 20 is now
ready for use
Release the
f
button. The contrast
on the display is now set.
Dialling numbers stored
in the calls list
Press the
d
and
f
buttons to find
the number you wish to dial from
the calls list.
Press the
Dial
button. The number
on the display is dialled automatically.
When the number is dialled the
display will show
LIFT HANDSET
.
Lift the handset of the telephone
connected to your Caller Display 20
within 10 seconds.
When the connected telephone is in
use the ‘extension in use’ icon
appears.
If you have dialled the wrong
number, or wish to stop dialling
out, press the
Clear
button.
Deleting a
single
number
from the calls list
Press the
d
and
f
buttons until you
have found the number you wish to
delete.
Press the
Clear
button twice in
quick succession (within one and a
half seconds).
The number is now deleted.
Clear
Clear
2
