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C4205™ User Guide
2.4 GHz Cordless Telephone
I
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™
Featuring Digital Clarity Power
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Technology
IMPORTANT SAFETY INSTRUCTIONS
When using your telephone equipment, basic safety
precautions should always be followed to reduce the
risk of fire, electric shock and injury to persons
including the following:
1. Read and understand all instructions.
2. Follow all warnings and instructions marked
on the telephone.
3. Do not use this telephone near a bath tub, wash
basin, kitchen sink or laundry tub, in a wet
basement, near a swimming pool or anywhere
else there is water.
4. Avoid using a telephone (other than a
cordless type) during a storm. There may be a
remote risk of electrical shock from lightning.
5. Do not use the telephone to report a gas leak
in the vicinity of the leak.
6. Unplug this telephone from the wall outlets before
cleaning. Do not use liquid cleaners or aerosol
cleaners on the telephone. Use a damp cloth for
cleaning.
7. Place this telephone on a stable surface.
Serious damage and/or injury may result if
the telephone falls.
SAVE THESE INSTRUCTIONS
3
IMPORTANT SAFETY INSTRUCTIONS
8. Do not cover the slots and openings on this
telephone. This telephone should never be placed
near or over a radiator or heat register. This
telephone should not be placed in a built-in
installation unless proper ventilation is provided.
9. Operate this telephone using the electrical
voltage as stated on the base unit or in the
owner’s manual. If you are not sure of the voltage
in your home, consult your dealer or local power
company.
10.Do not place anything on the power cord.
Install the telephone where no one will step
or trip on the cord.
11.Do not overload wall outlets or extension cords as
this can increase the risk of fire or electrical
shock.
12.Never push any objects through the slots in the
telephone. They can touch dangerous voltage
points or short out parts that could
result in a risk of fire or electrical shock.
Never spill liquid of any kind on the
telephone.
SAVE THESE INSTRUCTIONS
4
IMPORTANT SAFETY INSTRUCTIONS
13. To reduce the risk of electrical shock, do not
take this phone apart. Opening or removing
covers may expose you to dangerous voltages or
other risks. Incorrect reassembly can cause
electric shock when the appliance is subsequently
used.
14. Unplug this product from the wall outlet and
refer servicing to the manufacturer under the
following conditions:
A. When the power supply cord or plug is
frayed or damaged.
B. If liquid has been spilled into the product.
C. If the telephone has been exposed to rain
or water.
D. If the telephone does not operate normally
by following the operating instructions.
Adjust only those controls that are covered
by the operating instructions. Improper
adjustment may require extensive work by a
qualified technician to restore the telephone to
normal operation.
E. If the telephone has been dropped or the case
has been damaged.
SAVE THESE INSTRUCTIONS
5
IMPORTANT SAFETY INSTRUCTIONS
F. If the telephone exhibits a distinct change
in performance.
15. Never install telephone wiring during a
lightning storm.
16. Never install telephone jacks in wet locations
unless the jack is specifically designed for wet
locations.
17. Never touch uninsulated telephone wires or
terminals unless the telephone line has been
disconnected at the network interface.
18. Use caution when installing or modifying
telephone lines.
19. Use only the power cord and batteries indicated
in the manual. Do not dispose of batteries in a
fire. They may explode. Check with local codes
for possible special disposal instructions.
20. Plug the AC adaptor into the outlet that is nearest
and most accessible to the telephone.
SAFETY INSTRUCTIONS FOR BATTERIES
Caution: Risk of explosion if battery is replaced by an
incorrect type. Dispose of used batteries according to
the instructions.
SAVE THESE INSTRUCTIONS
6
IMPORTANT SAFETY INSTRUCTIONS
1. Use only the approved battery pack in the handset
of your cordless phone.
For Handset Unit: 3.6V 600mAHr
NiMH Rechargeable Battery
Sanik Battery Co. Ltd.: 3SNAAA60HSJ1
GPI International Ltd.: GP60AAAH3BMJZ
For Base Unit: Four (4) AA alkaline batteries
2. Do not dispose of the battery in a fire as it may
explode. Check with local codes for possible
special disposal instructions.
3. Do not open or mutilate the battery. Released
electrolyte is corrosive and may cause damage to
the eyes and skin. It may be toxic if swallowed.
4. Exercise care in handling batteries in order not to
short the battery with conducting materials such as
rings, bracelets and keys. The battery or conduction
material may overheat and cause burns.
5. Charge the battery (ies) provided with or identified
for use with this product only in accordance with
the instructions and limitations
specified in this manual.
6. Observe proper polarity orientation between
the battery pack and the battery charger.
SAVE THESE INSTRUCTIONS
7
FEATURES
Telephone Base
1. Handset Page
2. Ringer Volume
3. Ringer Style
7
6
4. Ringer On/Off
5. Antenna/Visual Ringer
6. Boost On/Off
7. Pulse/Tone
5
1
2
4 3
8
FEATURES
9. Flash
Handset
10. Mute
1. Neckloop Jack
2. Handset Volume
3. Boost
4. Dial Pad
5. Emergency Buttons
6. Talk
11. Redial/Pause
12. Handset Ringer Off/
Vibe/On
13. Handset Tone
14. Belt Clip
15. Headset Jack
16. Antenna/Visual Ringer
7. Channel
8. Memory
15
1
16
7
5
2
13
6
8
3
12
4
14
9
11
10
9
CHOOSING A LOCATION
1. This phone requires a modular
phone jack (RJ11C) and a
standard 120V AC wall
outlet.
2. Plug the AC Adapter directly
into outlet.
3. Do not plug other appliances
into the same outlet or have
outlet controlled by a wall
switch.
4. Choose a location that is out
of the way of normal
activities.
CAUTION: USE ONLY WITH
CLASS 2 POWER SOURCE
9V DC, 400MA.
Connecting
telephone line
cord
Always connect the AC Adapter
to the phone before you connect
it to the AC power. When you
finish, disconnect the AC power
before you disconnect it from the
phone.
10
CONNECTING YOUR TELEPHONE
Carefully remove your cordless
telephone from its box. If there is
any visible damage, do not
attempt to operate this
equipment. Return it to the place
of purchase. Check to be sure
that you have all items that come
with your telephone. You should
have a HANDSET, BASE UNIT,
BATTERY, AC ADAPTER,
TELEPHONE LINE CORD, BELT
CLIP and OWNERS MANUAL.
If at any time you have questions
about
your telephone please contact
our Customer
Service Department at:
1-800-552-3368
or 423-622-7793.
Connecting AC
Adapter
11
TABLE/DESK TOP INSTALLATION
CAUTION: Disconnect the telephone line cord before
connecting or disconnecting the battery backup in the
wall mount bracket.
1. Plug one end of the supplied modular telephone
line cord into the jack marked TEL located on the
back of the telephone base as shown in the
diagram.
2. Plug the modular telephone line cord’s other end
into a modular phone jack.
3. Insert the supplied AC Adapter’s plug into the
jack marked 9V DC 400mA located on the back
of the telephone base.
4. Plug the adapter into a standard 120V AC power
(electrical) outlet.
5. Align the mounting bracket on the back of the
base so that the black rubber feet are towards the
bottom of the phone. Insert the bracket’s tabs into
the slots and secure the bracket by sliding it
upward.
6. Lift the base’s antenna to a vertical position.
7. Set the TONE/PULSE switch located on the back
of the base to correct dialing mode. Please check
with your local Phone Company if uncertain of the
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type of service.
8. Place handset in the cradle to begin initial
charging.
WALL MOUNTING INSTALLATION
CAUTION: Disconnect the telephone line cord before
connecting or disconnecting the battery backup in the
wall mount bracket.
The base unit may be mounted on a standard wall
plate.
1. Plug one end of the supplied short modular
telephone line cord into the TEL jack located on the
back of the base of the phone.
2. Insert the plug of the AC adapter into the jack
marked DC 9V 400mA located on the back of the
telephone base.
3. Align the mounting bracket on the back of the
base so that the black rubber feet are towards the
bottom of the phone. Insert the bracket’s tabs into
the slots and secure the bracket by sliding it
upward.
4. Plug the short modular telephone line cord into the
wall plate jack, then align the mounting bracket’s
keyhole slots with the wall plate studs and slide the
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base of the phone downward to secure it on the
wall.
5. Plug the adapter into a standard AC power
(electrical) outlet.
6. Press and lift out the handset holder tab, turn it
around so the narrow tab end extends out and
slide back into its slot. This will hold the handset in
the cradle when the phone is wall mounted.
7. Lift the base’s antenna to a vertical position.
8. Set the Tone/Pulse switch located on the end of the
base to correct dialing mode. Please check with
your local Phone Company if uncertain of the type
of service.
9. Place handset in the cradle to begin initial
charging. Remember, you must charge the phone
for at least 12 hours before you use the phone for
the first time.
Note: Remember, you must charge the phone for at
least 12 hours before you use the phone for the first
time.
HANDSET BATTERY INSTALLATION
The C4205 uses a 3.6Volt 600mAh NiMH
rechargeable 3 cell (AAA Type) battery that is
included with your unit.
14
Handset Battery must be
connected before
beginning initial charging
To Install a New Battery
1. Remove battery cover
2. Install new battery
3. Connect battery pack
4. Replace battery cover
5. Charge for 12 hours
before first use
Handset Battery Charging
1. Place the handset in the
base. The CHARGE LED
on the base will light
RED.
2. After the batteries are
fully charged, check for
dial tone by pressing
TALK on the handset.
Installing
and
connecting
battery
Note:
The battery in the handset
must be fully charged for
12 hours before using the
telephone for the first time.
15
Low Battery
When the handset battery gets low, there will be two
(2) beeps every thirty (30) seconds. If the battery
becomes low while you are on a call, you will be
disconnected after about two (2) minutes. Terminate
the call and recharge the battery. To recharge the
battery pack, place the handset in the base.
1. Make sure the contact points are touching
and the CHARGE LED is lit.
2. Be careful not to short battery with Conducting
materials such as rings, bracelets and keys.
Talk Time: about Standby Time: about
four (4) hours
eight (8) days
Battery Life
A fully charged battery provides an average talk time
of about four (4) hours, or standby time of about (8)
days. Talk time and standby time may vary
depending on operating conditions.
16
TELEPHONE HANDSET
Digital Clarity Power Technology
With Digital Clarity Power, the high frequency sounds
are amplified more than the low frequency sounds so
words are not just louder, but clearer and easier to
understand. It also provides intelligent amplification to
make soft sounds audible, while keeping loud sounds
bearable.
BOOST – Clarity Power On/Off
The C4205 has a button that controls the loudness of
the receiver. Once the BOOST button is pressed, an
extra level of amplification is added over the entire
range of the volume control.
The TALK button will light ORANGE to indicate the
CLARITY POWER feature is activated.
Boost On: Talk button Boost Off: Talk button
is ORANGE
is GREEN
WARNING: When the TALK button is lit ORANGE
volume may be at a high level. To protect hearing,
lower the volume control to minimum before using.
17
Volume Control
The dial controls the level of volume the handset and
headset receive. The volume dial provides up to 15
decibels of volume before the CLARITY POWER
button is activated. Once the CLARITY POWER button
is pressed, the C4205 will provide up to 50 decibels
of amplification.
Tone Switch
Adjusting the TONE switch allows you to customize
your hearing experience. Since we all have different
hearing preferences we suggest exploring each
setting to find the one most comfortable for you.
Handset Ringer
Set the switch marked Ringer OFF/VIBE/ON located
on the side of the handset. When VIBE is selected the
handset will ring and vibrate when receiving an in-
coming call. The ringer switch must be set to ON or
VIBE for the handset to ring.
NOTE: If both handset and base ringers are set to
OFF, the visual ringer will flash to indicate there is an
incoming call.
18
Headset Jack
You can use this telephone hands-free when you
install a 2.5mm headset (purchased separately). To
install, plug the headset into the HEADSET JACK at
the top of the handset. While in headset mode, the
volume of headset is controlled by the telephone and
the handset’s earpiece and microphone are
disconnected.
Ordering a Headset
In the event you wish to purchase a headset for your
C4205, please contact Plantronics at 1-800-544-4660
for location near you. We recommend using the
Plantronics M110 or M130 headset.
Belt Clip
You may choose to use the optional belt clip with your
handset.
1. To attach slide belt clip down onto groves. Press
the tabs on the belt clip into the slots to attach.
2. To remove, lift one side of the belt clip with
your thumbnail and push back.
Hearing Aid Compatibility
The handset has a special coil inside of it to couple
the sound to hearing aids equipped with T-Switches/
T-Coils.
19
TELEPHONE BASE
Ringer Volume
The base ringer volume adjustments are located on
the side of the telephone base.
Pressing the UP ( ) key on the base increases the
ringer sound by one level while pressing the DOWN
( ) key reduces the sound by one level. There are
a total of six levels from maximum to minimum. The
ringer will sound for two (2) seconds while choosing
a ringer volume, to allow the user to make a choice.
Ringer Style
The base ringer style adjustments are located on the
side of the telephone base. The style of ring can be
adjusted by pressing the RING STYLE button. Six (6)
styles are available allowing you to customize your
ring. The ringer will sound for two (2) seconds while
choosing a ringer style, to allow the user to make a
choice.
Visual Ringers
Visual ringers are located in both the handset
antenna and the base of the telephone. When an
incoming call is received, these lights will flash. The
handset visual ringer will also stay lit while the phone
is in use.
20
BOOST ON/OFF Switch
This switch will disable the reset feature of the
BOOST Clarity Power button as follows:
ON – When the BOOST ON/OFF switch is set to
ON, the Boost function will be ON every time a call
starts, and will default to ON every time the phone
hangs up. During a call, the BOOST Clarity Power
button can toggle the Clarity Power ON or OFF ac-
cording to the user’s needs.
OFF – When the BOOST ON/OFF switch is set to
OFF, the Boost function will be OFF every time a call
starts, and the user will need to press the BOOST
Clarity Power button in order to gain the extra level of
amplification. If the phone hangs up, the Clarity Pow-
er will reset to OFF. During a call, the BOOST Clarity
Power button can toggle the Clarity Power function
ON or OFF according to the user’s needs.
CAUTION: VOLUME WILL BE LOUD WHEN BOOST
SWITCH IS SET TO “ON”.
Pulse/Tone
Slide the switch to the type of telephone service you
have; TONE for touch-tone service or PULSE for
rotary dialing. Please check with your local telephone
company if uncertain of the type of service.
21
Flash
The FLASH button is activated to use custom calling
services such as Call Waiting or Three-Way Calling.
Please contact your local telephone company for
information on these services.
Mute
The MUTE button allows the user to conduct a
private conversation that you do not want the person
on the other end to hear. While in the mute mode, the
MUTE button will illuminate RED and the microphone
in the handset is disabled. Pressing the MUTE button
again will disengage the MUTE feature.
Redial/Pause
Press the RD/P button to redial the last number
dialed. Pressing the RD/P button while storing a
telephone number will insert a four (4) second pause.
This is commonly used when storing both the
telephone number and an extension or PIN number.
Battery Back-up
Installing four (4) AA Alkaline batteries into the desk/
wall mount bracket attached to the telephone base
will offer you a limited amount of time to continue
operating your telephone in the event of a power
failure.
22
To Install Battery Back-up Batteries
1. Disconnect telephone line cord and remove desk/
wall mount bracket from telephone base.
2. Disconnect battery back-up connector from the
telephone base.
3. Install four (4) AA Alkaline batteries with negative
(-) end of battery touching the spring.
4. Connect battery back-up connector to terminal on
bottom of telephone base.
5. Install desk/wall mount bracket to telephone base.
To Replace Battery Backup Batteries
1. Disconnect telephone line cord and remove desk/
wall mount bracket from telephone base.
2. Disconnect battery back-up connector from the
telephone base.
3. Remove batteries from desk/wall mount bracket.
4. Install four (4) AA Alkaline batteries with negative
(-) end of battery touching the spring.
5. Connect battery back-up connector to terminal on
bottom of telephone base
6. Install desk/wall mount bracket to telephone base
23
After installing the four (4) AA Alkaline batteries
please refer to the chart below:
Power Supply
Power LED Status
AC adapter and
good batteries
Steady Green
AC adapter and
no batteries
Steady Red
Power failure and
good batteries
Slow flashing red
Fast flashing red
Power failure and
bad batteries
USING YOUR TELEPHONE
Placing a Call
1. Press the TALK button (TALK button will illuminate
GREEN) and dial the number you wish to call.
2. To end the call press the TALK button or place
the handset in the base.
Answering a Call
If the handset is out of the cradle, press the TALK
button.
24
If the handset is in the cradle, simply lift the handset
to answer.
Note: Refer to BOOST Clarity Power and Volume
Control for information on adjusting volume controls
on Page 15.
Last Number Redial
The last number dialed (up to 32 digits) is stored in
the redial memory until another number is dialed.
To use this feature:
1. Press the TALK button.
2. When you hear the dial tone, press the RD/P
button.
3. The phone will automatically dial for you.
Pause Feature
Programming in a pause will cause the phone to wait
four (4) seconds before dialing additional numbers.
This feature may be used when it is necessary to dial
an access code (9, for example) and wait for a
second dial tone before you can dial an outside
number. Press the RD/P button at the required point
during the memory storage process to program a
pause.
25
Temporary Tone
If you have rotary (pulse) dial service, you can
change from pulse to touch tone (tone) during a call.
1. Make phone call and wait until it is connected.
2. Press the * key. Keys pressed after this are sent as
tone signals.
3. The phone will automatically reset to rotary (pulse)
service after the call ends.
Lighted Key Pad
The key pad will light for fifteen (15) seconds after
removing the handset from the base. To reactivate the
feature while in standby, press the TALK or the MEM
button. To activate while the phone is in use, press
any key.
Page/Handset Locator
To send a page signal from the base to the handset,
press the PAGE button located on the base of the
telephone. A series of rings will sound from the
handset.
To locate the handset if it is away from the base,
press and hold the PAGE button for approximately
five (5) seconds. A series of rings will sound. Return
the handset to the base or press any button to cancel
the page.
26
Channel Operation
The C4205 cordless telephone automatically
searches and selects the clearest of 40 channels
when it is being used. If interference develops on the
line, pressing this button will move to another
channel.
Security Code
The security code prevents your cordless phone
conversations from being accessed by a phone on a
different line. Once the handset battery is fully
charged, the handset will automatically select the
code from over 65,000 different combinations. The
code is changed every time the handset is placed in
the cradle. If you have trouble with placing or
receiving calls, a lost security code may be the cause
of the problem. When this occurs, the handset can no
longer communicate with the base.
MEMORY STORAGE
The C4205 has ten (10) indirect, or two touch,
memory storage locations on the telephone hand-
set (0-9) that can be programmed to dial frequently
called numbers of up to 16 digits.
27
Adding a Memory Location
1. Unit must be in standby mode only.
2. Press the MEM button.
3. Enter the telephone number you wish to store.
4. Press the MEM button.
5. Press the number on the dial pad that you
wish to store the number to.
6. A long beep will indicate the programming
process is complete.
During the memory storage process the TALK
button will flash GREEN.
Use the RD/P button while entering the telephone
number to insert a pause. Refer to the Pause Feature
section on page 21.
Dialing a Memory Location
1. Press the TALK button.
2. Press the MEM button.
3. Press the number on the dial pad where the
desired number has been stored.
4. The call will automatically dial.
Adding an EMERGENCY Number
1. Unit must be in standby mode only.
2. Press the MEM button.
28
3. Enter the telephone number you wish to store.
4. Press the MEM button.
5. Press the emergency button on the dial pad that
you wish to store the number to.
6. A long beep will indicate the programming
process is complete.
Dialing an EMERGENCY Number
1. Press the TALK button.
2. Press the EMERGENCY key you wish to call.
MAINTENANCE AND CARE
The C4205 has been designed to give you years of
dependable service with a minimum of care. To en-
sure the utmost in performance, follow these guide-
lines in caring for the unit:
1. Avoid dropping or knocking the unit.
2. Dust the unit regularly. Wipe the unit with a soft
damp cloth.
3. Do not use detergents and avoid excess moisture.
4. The C4205 is an electrical device. Avoid electric
shock by keeping the phone away from water (i.e.
bathroom, kitchen sink, etc.)
29
TROUBLESHOOTING
The unit will not operate/no dial tone:
• Verify the TALK Button is lit.
• Verify the AC Adapter is securely plugged into AC
outlet, the base and the telephone.
• Verify the telephone line cord is securely plugged
into the wall jack and the telephone.
• Make sure the base antenna is in an upright
position.
• Make sure the handset battery is fully charged.
• Verify the telephone is in the correct dialing
mode, tone (touch) or pulse (rotary).
• Make sure you are in the usable range of the
base station.
• Reset the security code by placing the handset
in the base for 5-10 seconds.
The phone does not ring when you receive a call:
• Make sure the RINGER switch on the handset
and base are set to ON.
• Verify the AC Adapter is securely plugged into
AC outlet, the base and the telephone.
• Verify the telephone line cord is securely
30
plugged into the wall jack and the telephone.
• Make sure you are in the usable range of the
base station.
• You may have too many extensions on your line.
Try unplugging a few devices.
Noise, Static, Interference or Other Calls Heard while
Using the Handset:
• Try changing channels.
• Make sure the base antenna is in an upright
position.
• Make sure you are in the usable range of the
base station.
• Make sure the handset battery is fully charged.
• Try relocating the base unit to another location.
• Make sure the AC Adapter is not plugged into
the wall outlet with other appliances.
Phone Will Not Hold Charge:
• Make sure the charging contacts on the
handset and base are free of dust and dirt.
Clean the contacts with a soft cloth.
• Make sure CHARGE LED on the base is lit when
handset is in the cradle.
31
• If necessary, replace the handset battery. (See
Handset Battery Charging)
Difficulty in Placing or Receiving Calls:
• Move closer to the base and try again.
• If moving closer does not work, you may have
lost the security code.
• Reset code by placing the handset back on the
base for 5-10 seconds. (See Security Code
Section)
• Make sure you have selected the correct dialing
mode, tone or pulse.
• Make sure the AC Adapter is not plugged into a
wall outlet with other appliances. Disconnect for
5-10 seconds then reconnect. Place the handset
back on the base and reinsert the AC Adapter.
• Make sure the handset battery is fully charged.
32
Clarity, a Division of Plantronics, Inc.
4289 Bonny Oaks Drive, Suite 106
Chattanooga, TN 37406
1-800-552-3368
Made in China
©2005-2007 Clarity, a Division of Plantronics, Inc.
All rights reserved. Clarity, Clarity Professional,
C4205, Digital Clarity Power and DCP
are trademarks or registered trademarks of
Plantronics, Inc.
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