6.Slots and openings in the cabinet back or 
bottom are provided for ventilation. To 
protect it from overheating, these openings 
must not be blocked by placing the product on the bed, sofa, rug, or other similar 
surface. This product should never be 
placed near or over a radiator or heat 
register. This product should not be placed 
in an enclosed environment unless proper 
ventilation is provided.
7.Do not allow anything to rest on the power 
cord. Do not locate this product where the 
cord will be abused by animals or persons 
walking on it.
8.Do not overload wall outlets and extension 
cords as this can result in risk of fire or 
electrical shock.
9.Never spill the risk of electrical shock, do 
not disassemble this product. Instead take 
it to a qualified service person when service or repair work is required. Opening or 
removing covers may expose you to dangerous voltage or other risks. Incorrect reassembly can cause electrical shock when 
the appliance is subsequently used.
IF YOUR PRODUCT UTILIZES BATTERIES, THE FOLLOWING ADDITIONAL PRECAUTIONS SHOULD BE
ERROR MESSAGES
ERROR is displayed if the call information is 
not received correctly due to bad 
transmission (static on line) or if you pickup 
the phone before the second ring. 
This means that the call had some or all of 
the Caller ID information missing and 
cannot be displayed correctly. The ERROR 
message will go away after 20 seconds, or 
if another call is received.
CARE AND MAINTENANCE
Your system is an example of superior 
design and craftsmanship. The following 
suggestions will help you care for your 
Caller ID unit so you can enjoy it for years. 
* Keep the unit dry. If it gets wet, wipe it dry
immediately. Liquids can contain minerals 
that can corrode the electronic circuits. 
* Handle the unit carefully. Dropping it can
damage circuit boards and cases and can 
cause it to work improperly.
* Use and store the unit only in normal tem-
perature environments. Temperature 
extremes can shorten the life of electronic 
devices and distort or melt plastic parts.
* Keep the away from dust and dirt, which
can cause premature wear of parts.
* Caller’s Name 
* Caller’s Number 
* Date and Time of Call 
* New Indicator 
* Call Waiting Indicator
Note: The unit will only receive Caller ID on 
Call Waiting information from the telephone 
that is connected to it. If the AC adapter is not 
properly connected to the AT50CWLD, 
Caller ID on Call Waiting will not be received.
CALLER ID CALLBACK
The AT50CWLD can dial a telephone number from the Caller ID memory using the 
Callback feature.
1.Press the REVIEW 
2 or 5 keys to dis-
play the call record you want to call back.
2.Press the CALLBACK key, the display will 
show "Lift Handset" not “Dialing”. The 
number will appear on the screen. Add 
the prefix "1" to a ten digit number by 
quickly pressing the CALLBACK key 1 
time. The digit “1” is NOT automatically 
added. When you “Lift Handset” the number will automatically dialed. 
Screen will not show PICKUP HANDSET
* Use only fresh batteries of the required size
and type. Never leave a dead or weak 
battery in the unit. It might leak chemicals 
that can damage the unit.
* Wipe the unit with a damp cloth occasion-
ally to keep it looking new. Do not use 
harsh chemicals, cleaning solvents, or 
strong detergents to clean it.
TROUBLESHOOTING
If you experience trouble with the unit, disconnect it from the telephone line and connect a known working unit to the line. If the 
known working unit does not operate properly and displays the same symptoms contact 
your local telephone company for assistance. If the known working unit does operate properly, try to solve the problem with 
the steps below.
Telephone Rings but There is No Caller ID 
Data 
* Check with your telephone company to be
sure Caller ID service is activated. 
* Check to see if the batteries need replacing. 
* Did you let the telephone ring 2 times? 
* Make sure all line cord connections are
correct.
Wrong Language is Display 
* See Setting the language section.
ERROR Appears on the Display 
* You may have received a bad transmis-
sion. The message will remain on the dis-
play for 20 seconds. 
* If you pick up the telephone before the sec-
ond ring, the caller information may not
be completely received resulting in an
ERROR message. 
* If you have an answering machine con-
nected to the same line, make sure it is set
to answer after two or more rings so it
does not interfere with receiving Caller ID
data.
The Display is Blank or Dim 
* The batteries need to be replaced. See
Battery Installation & Replacement section. 
No Caller ID in “Call Waiting” 
(AT-50CWLD only) 
* Requires subscription to Caller ID on Call
Waiting service offered by you local tele-
phone company. 
* The AC adapter is not properly connected. 
* You are of-hook from a telephone that is
not directly connected to the unit. The tele-
phone connected to the unit must be off 
hook to receive the Call Waiting ID.
IMPORTANT SAFETY INSTRUCTIONS
This symbol is alert you to important
operating or servicing instructions 
that may appear in the user’s manual. 
Always follow basic safety precautions when 
using this product to reduce the risk of injury, 
fire, or electrical shock. 
When using this product, 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 product.
3.Unplug this product from the wall outlet
before cleaning. Do not use liquid cleaners or aerosol cleaners. Use damp cloth 
for cleaning.
4.Do not use this product near water; for
example, near a bathtub, wash bowl, 
kitchen sink or laundry tub, in a wet basement or near a swimming pool.
5.Do not place this product on an unstable
cart, stand, or table. The product may fall, 
causing serious damage to the product.
OBSERVED
1.Use only the type and size of batteries 
specified in the users manual.
2.Do not dispose of the batteries in a fire. 
The cell may explode. Check with local 
codes for possible special disposal 
instructions.
3.Do not open or mutilate the batteries. 
Released electrolyte is corrosive and may 
cause damage to the eyes or 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 ring, bracelets 
and keys. The battery or conductor may 
overheat and cause burns.
5.Do not attempt to recharge the batteries 
with or identified foe use with this product. The batteries may leak corrosive 
electrolyte or explode.
6.Do not attempt to rejuvenate the batteries 
provided with or identified for use with 
this product by heating them. Sudden 
release of battery electrolyte may occur 
causing burns or irritation to eyes or skin.
7.When replacing batteries, all batteries 
should be replaced at the same time. 
Mixing fresh and discharged batteries 
could increase internal cell pressure and
rupture the discharged batteries.
8.When inserting the batteries into the 
product, the proper polarity or direction 
must be observed. Reverse insertion of 
batteries can cause charging, which may 
result in leakage or explosion
9.Remove the batteries from this product if 
the product will not be used for a long 
period of time (several months or more) 
since during this time the batteries could 
leak, damaging the product.
10.Discard “dead” batteries as soon as 
possible since they are more likely to leak 
in a product.
11.Do not store this product, or the batteries provided with or for identified use 
with this product, in high temperature 
areas.
12.If your product uses a rechargeable battery, charge the battery(ies) only in 
accordance with the instructions and limitation specified in the User Manual.
SAVE THESE INSTRUCTIONS
CC2014 Rev 1.0