
User Guide
Digital cordless telephone featuring DECT
Synergy 500Twin
This equipment is not designed for making emergency telephone calls when the power fails.
Alternative arrangements should be made for access to emergency services.
This product is intended for connection to analogue public switched telephone networks
and private switchboards in the United Kingdom.

Please open this page for an ‘at a glance’
guide to your Synergy 500.

Please open this page for a further
‘at a glance’ guide to your Synergy 500.

At a glance
Base unit for handset 1
Synergy 500
Synergy 500
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DECT
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Power /
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Ensure that the
handset is placed on
the base unit face up.
Contacts
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DECT
Page
Power /
In Use
Charging
Page
Allows you to page
the handset(s)
to alert another
user or to locate
a handset
Power/In use
Comes on while
the mains power is
switched on.
(Mains power
must be on for the
phone to work).
Flashes while the
line is in use
Charging light
Comes on when
the handset
batteries are being
charged

Redial
To redial the last
number called
Recall
For use with a
Switchboard/PBX and
BT Select Services
Keypad
Talk
Use to make, receive
and end calls
Intercom
To make internal calls
between handsets
registered to the base
Label
Plastic label for
handset number
Quickdial
Allows you to store and
dial up to 10 numbers
in the memory
Conference
Allows you to
hold a three-way
conversation
Red light
To indicate that
the phone is
ringing or in use
Secrecy
Press to mute the
call so your caller
cannot hear you
talk to someone
close by
Volume
Adjust the handset
earpiece speech
volume
Charging light
Comes on when the
handset batteries
are being charged
Handset
Charging cradle for handset 2
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Quick guide
Function Key combination
Store a number in
Memory location 0-9 Tel no.
the memory
Dial a memory store Memory location 0-9
Handset ringer melody
setting 1-5
Handset ringer volume
setting 0-3
Base unit ringer melody setting 1-5
Base unit ringer volume setting 0-3
Check handset number
Check base number
Selection of Base Base number
De-register a handset Handset number
(from another handset)
Base PIN
Change the base pin
Current PIN
New PIN New PIN
Register new handsets
Press and Hold
Base number Base PIN
Transfer call to
Handset number
*
another handset
Three-way conversation
Handset number
*
Set the dialling mode 0 for tone or 1 for pulse
*These buttons should pressed when the other handset is answered

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In this guide
At a glance 1
Key features 5
Introduction 6
Unpacking your Synergy 500 7
For your records 7
Safety instructions 8
Setting up 9
Using your Synergy 500 12
Making and receiving calls 12
Redial 13
Secrecy 13
Paging 13
Recall 13
Using the 10 number memory 14
Handset settings 15
Base station settings 16
Using additional handsets 17
Operating with additional
base stations 20
BT Select Services 22
General information 23
Guarantee 23
Technical information 23
Switchboard compatibility 23
Wall mounting the charger 26
Help and advice 27
Index 28
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.

5
Up to five handsets work from
one base
You can make internal calls
between handsets, transfer
an external caller to another handset
or hold three way calls between two
handsets and an external caller.
10 number memory
Store up to 10 of your most
important or frequently
dialled numbers in the memory.
It’s then easy to dial numbers from
the memory. Each handset has an
individual memory store of 10 numbers.
Make internal and external
calls at the same time
With the maximum of five
handsets registered to the
base station, your Synergy 500 lets you
use all of them together. One handset
can be making an external call while
two handsets are being used to make
separate internal calls.
Enhanced call clarity
Highly advanced digital
technology (DECT)
ensures much clearer calls than
the older style phones.
Excellent handset range
Under ideal conditions you
can use your Synergy 500
handset at up to 300 metres from
the base station outside, or up to
50 metres inside.
Last number redial
Redial the last number called from
your handset.
Secrecy
This lets you talk to someone else
close by without your caller hearing
the conversation.
Key features

6
Please read the instructions carefully
before use and retain this user guide
for future reference.
DECT
By purchasing the Synergy 500 you
now own a product which combines
the advantages of cordless operation
with the performance of a high quality
corded telephone. It complies with the
Digitally Enhanced Cordless
Telecommunications (DECT)
standard and offers unparalleled
quality and features.
Building up a phone system
You can use up to 5 handsets with your
Synergy 500 base station without the
need for additional wiring.
This user guide applies to both single
and multiple handset systems. The
internal call functions described in
this guide apply only to Synergy 500
base stations with more than one
handset registered.
Introduction
Your Synergy 500 Twin has been designed for ease of use
and made to the high standards set by BT
Important
If you wear a hearing aid, please
note that the Synergy 500 works by
sending radio signals between the
base station and the handset.
These signals may interfere with
some hearing aids, causing a
humming noise.
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Synergy 500
DECT
Page
Charging
PowerŁ
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In Use
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For your records
For warranty purposes, proof of
purchase is required, so please
keep your receipt.
Enter your Base Station PIN here
See page 16 for more information.
Date of purchase:
Place of purchase:
Serial number (on the underside of telephone base):
Purchase price:
Synergy 500
Charging
PowerŁ
In Use
DECT
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Unpacking your Synergy 500
If anything is missing, please contact
your place of purchase immediately.
●
2 Synergy 500
handsets.
●
Synergy 500
base station.
●
Synergy 500
Charger.
●
4-NiCad
Batteries.
●
2 mains power
leads with 2
attached 13 amp
adaptor plugs.
●
Telephone
line cord.
●
Wall mounting
bracket
(for charging
cradle only).
●
Plastic
numbers.
1
2
3
4
5
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Safety instructions
Use only the approved
battery pack supplied. Spare
batteries – Item Code: 872261
are available from BT Shops and the
Synergy 500 Helpline 0845 769 7146.
Do not try to use any other power
supply unit except the one provided,
otherwise you may permanently
damage your Synergy 500. It may also
invalidate approval of this apparatus.
To get a replacement Synergy 500 base
station power supply unit – Item Code
872260 – and a Synergy 500 additional
handset charger power supply unit
– Item code 872259 – contact the
Synergy 500 Helpline 0845 769 7146.
There is a slight chance your
phone could be damaged by
an electrical storm. We
recommend that you unplug your
Synergy 500 from the mains power
and telephone socket during storms.
The Synergy 500 will produce
a certain amount of heat
during operation. Equally, the
handset as well as any additional
chargers you purchase can also
become warm during charging.
We advise against placing these
products on antique, veneered or
wooden surfaces as damage may occur.
Do not use the Synergy 500
in damp, humid conditions
such as bathrooms. Do not
expose the equipment or batteries to
fire and water.
Do not dispose of used
batteries with general
household rubbish and do not
burn them.
Do not use the handsets in
places where there are
explosive hazards.
If you wear a hearing aid,
please note that the Synergy
500 works by sending radio
signals between the base station and
handset. These signals may interfere
with some hearing aids, causing a
humming noise.
Synergy 500 can interfere with other
electrical equipment, e.g. answering
machines, TV and radio sets, clock
radio/alarms and computers if placed
too close. It is recommended that you
place your Synergy 500 at least one
metre away from such appliances to
minimise any risk of interference.
Make sure you connect the power and
telephone lines to the correct sockets
in the base station.
Clean the handset and base station
with a damp (not wet) cloth or
antistatic wipe. Never use a dry cloth
as this may cause a static shock.
Never spray cleaning fluid directly
onto the telephone.