Radio Shack ET-548 User Manual

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Cat. No. 43-1048

OWNER’S MANUAL

Please read before using this equipment.

ET-548

25-Channel Cordless

Headset Telephone

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FEATURES

Your RadioShack ET-548 25-Channel
Cordless Headset Telephone gives you
communication with both portability and
convenience. It comes in two parts, a
headset and a base.

The phone’s headset connec ts to a cord­less remote keypad, so you can make
calls away from its base. The headset lets
you keep your hands free to do other
things such as cook or work at your com ­puter while you talk. The base’s space­saving, upright design makes it perfect for
areas where space is limited.

Your phone includes these features:

Advanced Super CCT Ci rcuitr

— pro­vides sound clarity comparable to that of
a corded phone.

Securit

Access-Protection Code

—
prevents other cordless phone users from
using your phone line while the remote
keypad is off the cradle.

®

COM-LOK

— ensures that other cord­less phone users cannot use your phone
line when the remote keypad is on the
cradle.

10-Number Memor

Dialin

— lets you
store 10 numbers i n memory for e asy di­aling.

Auto Scan

— automatically selects a
clear channel when you pick up the
phone. You can also manually switch to
another channel.

— lets you redial the last number

Redial

dialed, with the touch of a button.

Privac

— prevents the person on the
other end of the phone line from hearing
you as you talk to someone else in the
room.

— sends an electronic switchhook

Flash

signal for use with special phone services
such as Call Wa iting.

Touch-Tone or Pulse (Rotar

) Dialin

— lets you use your phone with either
type of service.

Belt Clip

— lets you carry the phone’s re­mote keypad on your belt for easy porta­bility.

Hearin

-Aid Compatibilit

— lets you
use your phone with hearing aids that
have a T (telephone) switch.

© 1997 Tandy Corporation .

COM-LOK is a registered trademark used by Tandy Corporation.

RadioShack is a trademark used by Tandy Corporation.

All Rights Reserved.

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CAUTION

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This phone has been tested and found to
comply with all applicable UL and FCC
standards.

Important Note: Cordless phones such
as this one require AC power to operate.
When the AC power is off, you cannot dial
out or receive incoming calls using your
ET-548. To be safe, you should also have
a phone that does not need AC power to
operate (not a cordless phone) so you
can still mak e and recei ve calls if the re is
an AC power failure.

Note: Your phone operates on standard
radio frequencies as allocated by the
FCC. It is possible for other radio units
operating nearby on similar frequencies
to unintentionally intercept your conversa­tion or cause interference. This possible
lack of privacy can occur with any cord­less phone.

We recommend you record your ph one’s
serial number here. The num ber is on the
bottom of the base.

Serial Number: __________________

Warning: To prevent f ire or shoc k
hazard, do not expose this product
to rain or moisture.

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

CAUTION: TO REDUCE THE RISK OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER OR BACK. NO USER -SERVICE­ABLE PARTS INSIDE. REFER SERVIC­ING TO QUALIFIED PERSONNEL.

This symbol is intended to alert you to
the presence of uninsulated dangerous
voltage within the product’s enclosure
that mi ght b e of suff icient m agnit ude to
constitute a risk of electric shock. Do not
open the product’s case.

This symbol is intended to inform you
that important operating and mainte-

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nance in str uc ti ons a re in clud ed in t he li t­erature accompanying this product.

The supplied adapter is a Class 2 120V
AC/12V DC adapt er t hat deli ver s at le ast
200 milliamps with its center tip set to
positive.

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READ THIS BEFORE
INSTALLATION

We have designed your phone to conform
to federal regulations, and you can con­nect it to most telephone lines. However,
each device that you connect to the
phone line draws power from the phone
line. We refer to this power draw as the
device’s
REN. The REN is on the bottom of the
base.

If you are using more than one phone or
other device on the line, add up all the
RENs. If the total is m ore th an five, your
phones might not ring. In rural areas, a to­tal REN of three m ight i mpa ir rin ger op er­ation. If ringer operation is impaired,
remove a device from the line.

ringer equivalence number

, or

FCC STATEMENT

This telephone complies with Part 68 of

FCC Rules

vide the FCC Registration Number and
the REN to your phone company. These
numbers are shown on the bo ttom of the
base.

Note:

to any of the following:

• coin-operated systems

• party-line syst ems

• most electronic key phone systems

. You must, upon request, pro-

You must not conne ct your phone

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CONTENTS

Installatio n .................................................................................................................... 6

Selecting a Location ................................................................................................ 6

Connecting the Phone ............................................................................................. 6

Connecting and Charging the Battery Pack ............................................................ 7

Attaching the Headset Holder ................................................................................. 9

Adjusting the Headset .. ........................................................................................... 9

Setting the Dialing Mode ....................................................................................... 10

Using the Belt Clip ................................................................................................. 10

Operation .................................................................................................................... 11

Making and Receiving Calls .................................................................................. 11

Changing Channels ............................................................................................... 12

Setting the Volume ................................................................................................ 12

Using Redial .......................................................................................................... 12

Using Privacy ........................................................................................................ 13

Using Flash ........................................................................................................... 13

Using Tone Services on a Pulse Line .................................................................... 13

Memory Dialing ..................................................................................................... 14

Storing a Number in Memory .......................................................................... 14

Entering a Pause in a Memory Number .......................................................... 15

Dialing a Stored Number ................................................................................ 15

Chain Dialing Service Numbers ...................................................................... 15

Testing Stored Emergency Numbers .............................................................. 15

Troubleshootin

Care and Maintenance ............................................................................................... 18

Replacing the Battery Pack ................................................................................... 19

The FCC Wants You to Know ................................................................................ 20

Lightning ................................................................................................................ 21

......................................................................................................... 16

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INSTALLATION

SELECTING A LOCATION

You can place the phone’s base on a
desktop, shelf, or table. Select a locat ion
that is:

• near an AC outlet

• near a telephone line jack

• out of the way of normal activities

• away from electrical m achinery, elec­trical appliances, metal walls, filing
cabinets, wireless intercoms, secu­rity alarms, and room monitors

The base’s location affects the phone’s
range. If you have a choice of several lo­cations, try each to see which provides
the best performance.

Your telephone connects directly to a
modular telephone line jack. If your tele­phone wiring does not have a modular
jack, you can update the wiring yourself
or have the telephone company update it
for you.

Caution:

2 120V AC/12V DC adapter that deli vers
at least 200 milliamps with its center tip
set to positive. Its plug correctly fits the
phone’s
that does not meet these requirements
could damage the phone or the adapter.

The supplied adapter is a Class

DC 12V

jack. Using an adapter

CONNECTING THE PHONE

After you select a location f or the phone’s
base, follow these steps to connect it to
AC power and to the phone line.

Illustration

Notes:

• RadioShack stores sell jacks and
adapters to convert older wiring meth­ods to modular wiring.

• The USOC number of the ja ck to be
installed is RJ11C.

6

1. Plug one end of the supplie d m odular
cord into the
back of the base.

2. Plug the modular cord’s other end
into a modular phone line jack.

TEL. LINE

jack on the

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3. Plug the supplied AC ad apte r’s barrel
plug into the
of the base.

4. Plug the adapter into a standard AC
outlet. The IN USE/CHARGE indica­tor lights when the keypad is on the
base.

5. Lift the base’s antenna to a vertical
position.

DC 12V

jack on the back

CONNECTING AND
CHARGING THE BATTERY
PACK

The ET-548 comes with a rechargeable
nickel-cadmium battery pack in the re­mote keypad. You must connect and then
charge the battery pack for at least 15
hours before you use it the first time.

1. Use a P hillips screwdriv er to remove
the screw that secures the battery
compartment cover, then remove the
cover.

2. Slide the battery pack’s connector
onto the connector pins inside the
battery compartment.

Illustr ation

3. Replace the cover and s ecure it with
the screw.

4. To cha rge the b attery pack, pla ce the
remote keypad on the base. The IN
USE/CHARGE indicator on the base
lights.

Illustr ation

Illust ration

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Recharge the battery pack when the
TALK/LOW BATT. indicator lights.

Illustration

Notes:

• When you first use the phone after
charging or recharging the battery
pack, the phone might not work and
you might hear error tones. (You do
not hear the error tones if

OFF

set to

.)

POWER

is

If you hear the error tone s, return the
remote keypad to the cradle for at
least 5 seconds to reset the security
access-protection code.

• About once a month, fully discharge
the battery pack by keeping the
phone off the base until the TALK/
LOW BATT. indicator lights. Other­wise, the battery pack loses its ability
to fully recharge.

• If the IN USE/CHARGE indicator
does not light when y ou pla ce the re­mote keypad on the base, be sure the
battery pack and AC adapter a re cor­rectly and securely connected. Also,
check the charging contacts on the
remote keypad and base. I f the con­tacts are dirty or tranished, clean
them with a pencil eraser.

Illustration

• If battery power is low,

ON

to

, and the headset is not in use,

POWER

the TALK/LOW BATT. indicator slowly
flashes. If battery power is too low,
the indicator does not light.

8

is set

• If you are not going to use your phone
for an extended period of time, dis­connect its battery. This helps to in­crease the battery’s usable life.