Radio Shack Conference Phone ET 928 User Guide

43-1098.fm Page 1 Tuesday, August 17, 1999 4:03 PM  
Cat. No. 43-1098  
OWNER’S MANUAL  
Please read before using this equipment.  
ET-928  
Digital Spread Spectrum  
900 MHz Cordless Speakerphone  
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Out of Range Signal — the handset  
beeps twice to let you know when you  
move out of the base’s operating range.  
Hearing Aid Compatible — lets you  
use this telephone with hearing aids that  
have a T (telephone) switch.  
Security Access Protection Code —  
changes each time you place the hand-  
set on the base, to minimize the chanc-  
es of other cordless phones using your  
phone line.  
This phone has been tested and found  
to comply with all applicable UL and  
FCC standards.  
For your records, we recommend you  
record the phone’s serial number here.  
The number is on the bottom of the  
base.  
20 Channels — scans the 20 frequency  
pairs used between the base and the  
handset and automatically selects a  
clear channel each time you make or re-  
ceive a call.  
Serial Number:  
Any-Key Answer — lets you press any  
key on the handset to answer an incom-  
ing call.  
WARNING: To reduce the risk of  
fire or shock hazard, do not ex-  
pose this product to rain or mois-  
ture.  
Programmable Ringers — let you se-  
lect from four ringer types and turn the  
ringer on or off at both the handset and  
the base.  
CAUTION  
RISK OF ELECTRIC SHOCK.  
!
DO NOT OPEN.  
Hold — lets you answer an incoming  
call without disconnecting the current  
call.  
CAUTION: TO REDUCE THE RISK OF  
ELECTRIC SHOCK, DO NOT REMOVE  
COVER OR BACK. NO USER-SERVICE-  
ABLE PARTS INSIDE. REFER SERVIC-  
ING TO QUALIFIED PERSONNEL.  
Mute — prevents the person on the oth-  
er end of the phone line from hearing  
your conversation with someone in the  
room.  
This symbol is intended to alert you to  
the presence of uninsulated danger-  
ous voltage within the product’s enclo-  
sure that might be of sufficient  
magnitude to constitute a risk of elec-  
tric shock. Do not open the product’s  
case.  
Flash — sends an electronic switch-  
hook signal for use with special phone  
services such as Call Waiting.  
This symbol is intended to inform you  
that important operating and mainte-  
nance instructions are included in the  
literature accompanying this product.  
Redial — lets you quickly dial the last  
number dialed.  
!
3
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Important:  
FCC STATEMENT  
• Cordless phones such as this one  
require AC power to operate. When  
AC power is off, you cannot dial out  
or receive incoming calls using your  
ET-928. For this reason, the ET-928  
should not be your only telephone.  
To be safe, you should also have a  
phone that does not require AC  
power to operate (not a cordless  
phone), so you can still make and  
receive calls if there is an AC power  
failure.  
This telephone complies with Part 68 of  
FCC Rules. You must, upon request,  
provide the FCC Registration Number  
and the REN to your phone company.  
These numbers are on the label on the  
bottom of the base.  
You must not connect your phone to any  
of the following:  
• Coin-operated systems  
• Party-line systems  
• Some cordless phones operate at  
frequencies that might cause inter-  
ference to nearby TVs and VCRs.  
To minimize or prevent such interfer-  
ence, the base of the cordless  
phone should not be placed near or  
on top of a TV or VCR.  
• Most electronic key phone systems  
READ THIS BEFORE  
INSTALLATION  
Your telephone conforms to federal reg-  
ulations, and you can connect it to most  
telephone lines. However, each device  
you connect to the phone line draws  
power from the phone line. We refer to  
this power draw as the device’s ringer  
equivalence number, or 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 more than five, your  
phone might not ring. In rural areas, a  
total REN of three might impair ringer  
operation. If ringer operation is impaired,  
remove a device from the line.  
4
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CONTENTS  
Installation ............................................................................................................... 6  
Installing the Handset’s Antenna ........................................................................ 6  
Selecting a Location ........................................................................................... 6  
Placing on a Desk Top ................................................................................. 6  
Mounting on a Wall Plate ............................................................................. 7  
Mounting Directly on the Wall ...................................................................... 9  
Preparation ............................................................................................................ 11  
Connecting and Charging the Battery Pack ..................................................... 11  
Setting the Dialing Mode .................................................................................. 12  
Adjusting the Ringers ....................................................................................... 12  
Turning On/Off the Ringers ........................................................................ 13  
Setting the Ringers’ Volume ...................................................................... 13  
Checking/Setting the Ringer Tone ............................................................. 13  
Operation ............................................................................................................... 14  
Making/Answering Calls ................................................................................... 14  
Using the Handset ..................................................................................... 14  
Using the Speakerphone ........................................................................... 14  
Switching Between the Handset and Speakerphone ................................. 15  
Adjusting the Volume ........................................................................................ 15  
Using Redial ..................................................................................................... 15  
Using Hold ........................................................................................................ 16  
Using Mute ....................................................................................................... 16  
Using Flash ...................................................................................................... 16  
Using Tone Services on a Pulse Line ............................................................... 17  
Changing Channels .......................................................................................... 17  
Special Features ................................................................................................... 18  
Memory Dialing ................................................................................................ 18  
Storing a Number ....................................................................................... 18  
Storing a Pause ......................................................................................... 19  
Dialing a Stored Number ........................................................................... 19  
Chain Dialing Service Numbers ................................................................. 19  
Testing Stored Emergency Numbers ......................................................... 19  
Using the Intercom ........................................................................................... 19  
Paging from the Base to the Handset ........................................................ 20  
Paging from the Handset to the Base ........................................................ 20  
Using an Optional Headset .............................................................................. 21  
Troubleshooting .................................................................................................... 22  
Out of Range Indications .................................................................................. 24  
Care and Maintenance .......................................................................................... 25  
Replacing the Battery Pack .............................................................................. 26  
The FCC Wants You to Know ........................................................................... 27  
Lightning ........................................................................................................... 27  
5
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INSTALLATION  
• The USOC number of the jack to be  
installed is RJ11C (RJ11W if you  
want to mount it on a wall plate).  
INSTALLING THE  
HANDSET’S  
ANTENNA  
Caution: You must use an AC adapter  
that supplies 9 volts with the center tip  
set to positive. It must deliver 500 milli-  
amps, and its plug must properly fit the  
telephone’s DC 9V jack. The supplied  
AC adapter meets these specifications.  
Using an adapter that does not meet  
these specifications could damage the  
telephone or the adapter.  
Insert the antenna into the  
hole on the top of the hand-  
set, then twist the antenna  
clockwise until it is secure.  
SELECTING A LOCATION  
You can place the phone on a desk top,  
or mount it on a wall plate or directly on  
a wall. Select a location that is:  
Placing on a Desk Top  
• near an AC outlet  
1. Push in the two tabs on the top of  
the mounting bracket, then lift off  
just the upper part of the bracket.  
• near a telephone line jack  
• away from electrical machinery,  
electrical appliances, metal walls or  
filing cabinets, wireless intercoms,  
alarms, and room monitors  
illus -- enlarge to fill  
space  
• away from other cordless phones  
The base’s location affects the phone’s  
range. If you have a choice of several lo-  
cations, try each to see which provides  
the best performance.  
2. Insert the supplied AC adapter’s  
barrel plug into the DC 9V jack on  
the back of the base, route the  
adapter cord through the strain relief  
slot and the hole on the bracket,  
then push in the mounting bracket’s  
upper end to click the bracket into  
place.  
Notes:  
• Your telephone connects directly to  
a modular telephone line jack. If  
your phone line jack is not a modu-  
lar jack, you can update the wiring  
yourself, using jacks and adapters  
available at your local RadioShack  
store. Or, you can let the phone  
company update the wiring for you.  
illus -- label strain relief slot  
6
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3. Plug one end of the supplied long  
modular cord into the phone line  
jack on the back of the base.  
Mounting on a Wall Plate  
1. Push in the two tabs on the top of  
the mounting bracket, then lift off the  
entire bracket.  
illus -- enlarge to  
fill space  
4. Plug the AC adapter into a standard  
AC outlet.  
2. Plug one end of the supplied short  
modular cord into the phone line  
jack on the back of the base, then  
press the cord into the center  
groove on the bottom of the base.  
5. Plug the modular cord’s other end  
into a modular phone line jack.  
3. Insert the supplied AC adapter’s  
barrel plug into the DC 9V jack on  
the back of the base. Then route the  
cord through the strain relief slot  
and press the cord all the way down  
into the groove on the bottom of the  
base.  
6. For the best reception, adjust the  
base’s antenna so it stands straight  
up.  
illus -- label strain relief  
7
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4. Position the mounting bracket with  
the narrow end on top. Route the  
short modular cord through the cen-  
ter hole of the bracket, and insert  
the two tabs at the top of bracket  
into the matching slots on the base’s  
back, near the jacks.  
plate, then slide the base downward  
to secure it.  
illus -- show modular  
cord already connected  
7. Plug the AC adapter into a standard  
AC outlet.  
Press the two tabs at the bottom of  
the bracket into the matching slots  
on the back of the base to lock the  
bracket into place.  
8. For  
the  
best  
reception, adjust  
the base’s anten-  
na so it stands  
straight up.  
5. Plug the modular cord’s other end  
into the wall plate’s modular phone  
line jack.  
6. Align the keyhole slots on the  
bracket with the studs on the wall  
8
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4. Insert the AC adapter’s barrel plug  
into the DC 9V jack on the back of  
the base. Then route the cord  
through the strain relief slot and  
press the cord into the groove on  
the bottom of the base.  
Mounting Directly on the Wall  
For this mounting method, you need two  
wood screws (not supplied) with heads  
that fit into the keyhole slots on the  
mounting bracket.  
3
16  
/
1. At the desired mounting  
location, drill two holes  
315/16 inches (100 mm)  
apart. Then thread a  
screw into each hole,  
letting the heads extend  
illus -- label strain  
relief slot  
315/16  
3
about /16 inch (5 mm)  
from the wall.  
5. Position the mounting bracket with  
the narrow end on top. Insert the  
two tabs at the top of bracket into  
the matching slots on the base’s  
back, near the jacks.  
2. Push in the two tabs on the top of  
the mounting bracket, then lift off the  
entire bracket.  
add illus -- like the one  
below Step 1 of  
previous section  
3. Plug one end of the supplied long  
modular cord into the phone line  
jack on the back of the base, then  
press the cord into the center  
groove on the bottom of the base.  
Press the two tabs at the bottom of  
the bracket into the matching slots  
on the back of the base to lock the  
bracket into place.  
9
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6. Align the keyhole slots on the  
mounting bracket with the screws on  
the wall, then slide the base down-  
ward to secure it.  
7. Plug the AC adapter into a standard  
AC outlet.  
8. Plug the long modular cord’s other  
end into a modular phone line jack.  
add illus -- like Step 5  
of previous section  
9. For  
the  
best  
reception, adjust  
the base’s anten-  
na so it stands  
straight up.  
10  
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PREPARATION  
Notes:  
You can hang the handset face up  
CONNECTING AND  
CHARGING THE BATTERY  
PACK  
on the base if it is wall-mounted  
(using the slot on the back of the  
handset); however, the battery pack  
will not fully charge in this position.  
The ET-928 comes with a rechargeable  
nickel-cadmium battery pack in the  
handset, but not connected. Before us-  
ing your phone, you must connect the  
battery pack, then charge it for about 24  
hours.  
• When you first use your phone after  
charging or recharging the battery  
pack, the handset might not work or  
it might sound an error tone when  
you press TALK. If this happens,  
place the handset on the base for  
about 5 seconds, then try again.  
1. Slide off the handset’s battery com-  
partment cover.  
• If the CHARGE indicator does not  
light when you place the handset on  
the cradle, be sure the battery and  
AC adapter are correctly and  
securely connected.  
2. Insert the battery pack’s  
connector with its flat  
side up into the phone’s  
socket. The connector  
fits only one way.  
add illus of indicator location  
3. Replace the cover.  
Also, check the charging contacts  
on both the handset and base. If the  
contacts are dirty or tarnished, clean  
them with a pencil eraser.  
To charge the battery pack, place the  
handset on the base.  
Recharge the battery pack when the  
BATT LOW indicator on the handset  
lights.  
add illus of contacts’ location  
add illus of indicator location  
11  
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SPEAKER  
• If the battery pack becomes weak,  
the handset sounds a short beep  
every 16 seconds during a call (or  
every 64 seconds when the handset  
is not in use) and the BATT LOW  
indicator flashes. Within about 10  
minutes, the phone will automati-  
cally disconnect. Recharge the bat-  
tery pack.  
2. Press  
(speakerphone) on  
TALK  
the base (or  
on the handset  
after the battery is charged) and lis-  
ten for a dial tone.  
illus -- (1) SPEAKER on base  
and (2) TALK on handset (show  
more of base)  
• If the battery pack loses its charge  
completely or the base loses power  
while the handset is away from it,  
the security access-protection code  
needs to be reset. To reset the secu-  
rity code, place the handset on the  
base. If it was the handset that lost  
power, leave the handset on the  
base to charge the battery pack.  
0
3. Press any number other than .  
Note: If your phone system requires  
that you dial an access code ( , for  
example) before you dial an outside  
number, do not press the access  
code either.  
9
• About once a month, fully discharge  
the battery pack by keeping the  
handset off the base until the BATT  
LOW indicator turns on. Otherwise,  
it loses its ability to fully recharge,  
and you might have to recharge and  
replace it more often.  
If the dial tone stops, you have  
T/P  
touch-tone service. Leave  
T
.
set to  
If the tone continues, you have  
T/P  
P
pulse (rotary) service. Set  
to .  
SPEAKER  
4. To hang up, press  
TALK  
on the  
base (or  
on the handset) so  
SETTING THE DIALING  
MODE  
either LED indicator turns off.  
T/P  
Set  
(Tone/Pulse) for the type of ser-  
ADJUSTING THE  
RINGERS  
vice you have. If you are not sure which  
type you have, do this test.  
The ET-928’s handset and base each  
have four different ringer tones. You can  
set the base’s and handset’s ringer tone,  
or turn off the ringer on either or both.  
T/P  
T
1. Set  
on the back of the base to .  
illus -- reduce to fit  
space  
12  
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Turning On/Off the Ringers  
add illus (2) of VOLUME  
locations  
To have the base ring when a call  
comes in, set RINGER ON/OFF on the  
back of the base to ON.  
illus -- reduce to fit  
space  
Checking/Setting the Ringer  
Tone  
To have it not sound, set RINGER ON/  
OFF to OFF.  
The base and handset are both preset  
to use the same ringer tone (1). To  
change or hear the different tones, press  
FLASH then 1, 2, 3, or 4 on that keypad  
when the phone is not in use. (The last  
number button you pressed is the tone  
you will hear.)  
location of  
handset’s  
RINGER  
ON/OFF set  
To have the handset  
ring when a call comes  
in, set RINGER ON/OFF  
on the handset’s left  
to ON  
side to ON.  
illus of FLASH  
To have it not sound, set RINGER ON/  
OFF to OFF.  
Note: Even if you turn off the ringer on  
the handset or base, you can still make  
calls using that keypad, and you can still  
answer calls if you hear another phone  
on that same line ring (see “Operation”  
on Page 14).  
Setting the Ringers’ Volume  
To adjust the ringers’ volume, when the  
phone is not on a call, repeatedly press  
VOLUME s or t on the handset or base.  
13  
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OPERATION  
You can use the keypad on the handset  
or base to operate the ET-928. To use  
the phone’s features during a call, how-  
ever, you must use the same keypad  
that you used to make or answer that  
call.  
Important: If you move the handset out-  
side the base’s range (about 550 feet),  
the handset will not operate properly  
and a call in progress might be discon-  
nected (see “Troubleshooting” on Page  
22).  
Using the Speakerphone  
MAKING/ANSWERING  
CALLS  
To make a call using the speakerphone,  
press SPEAKER so the SPEAKER indi-  
cator turns on. Listen for the dial tone,  
then dial the number.  
Using the Handset  
To make a call using the handset, lift the  
handset and press TALK. When you  
hear the dial tone, dial the number.  
illus of SPEAKER  
location; label  
indicator  
illus -- label TALK  
indicator  
To answer a call using the speaker-  
phone, press SPEAKER so the SPEAK-  
ER indicator turns on, then begin your  
conversation.  
To answer a call when the handset is on  
the base, lift the handset and begin your  
conversation.  
To answer a call when the handset is  
not on the base, press any key on the  
handset before speaking.  
To end a speakerphone call, press  
SPEAKER. The SPEAKER indicator  
turns off.  
Both the SPEAKER indicator on the  
base and the TALK indicator on the  
handset flash when you receive a call.  
While the speakerphone or handset is in  
use, the corresponding indicator lights  
steadily.  
Note: If background noise interferes  
with the speakerphone’s operation, you  
can press MUTE to turn off the base’s  
microphone while the other party is  
speaking (see “Using Mute” on Page  
16).  
To end a call, place the handset on the  
base or press TALK so the TALK indica-  
tor turns off.  
14  
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Switching Between the  
Handset and Speakerphone  
illus of base VOLUME  
To switch from the handset to the  
speakerphone at any time during a call,  
press HOLD on the handset, then  
SPEAKER on the base so its red indica-  
tor turns on, and begin the conversation.  
To turn the volume up or down during a  
call, repeatedly press VOLUME s or t on  
the handset or base. The ET-928 beeps  
once each time you press VOLUME s or  
t. When you reach the highest or lowest  
volume level, the ET-928 beeps three  
times.  
illus of handset HOLD location  
To switch from the speakerphone to the  
handset, lift the handset off the base. If  
the handset is already off the base,  
press HOLD on the base. The red  
SPEAKER indicator flashes. Then press  
HOLD on the handset to release the  
hold.  
USING REDIAL  
To redial the last number dialed, press  
REDIAL on the handset or base when  
you hear the dial tone.  
illus of handset/base  
REDIAL locations  
ADJUSTING THE VOLUME  
The handset’s VOLUME control lets you  
set the volume you hear through the  
handset to one of four levels. The base’s  
VOLUME control lets you set the volume  
of the speakerphone to one of eight lev-  
els.  
illus of base VOLUME  
15  
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USING HOLD  
USING MUTE  
HOLD  
MUTE  
button on the base (there is  
To place a call on hold, press  
on  
The  
the handset or base. The SPEAKER in-  
dicator on the base and the TALK indi-  
cator on the handset (if it is off the base)  
flash to remind you that the call is on  
hold. You and the other party cannot  
hear each other.  
none on the handset) lets you talk to  
someone else in the room without the  
person on the other end of the phone  
line hearing your conversation. Press  
MUTE  
during the call. The MUTE indica-  
tor on the base lights steadily.  
illus of HOLD locations  
on base and handset  
To take a call off hold and resume your  
MUTE  
Press  
again to resume your  
HOLD  
conversation, press  
set or base.  
on the hand-  
phone conversation. The MUTE indica-  
tor turns off.  
Note: You can use the hanging hole on  
the back of the handset to place the  
handset on the wall-mounted base face-  
up.  
USING FLASH  
FLASH  
You can use  
on the handset or  
base to produce a switchhook signal for  
special phone services, such as Call  
Waiting. If you have Call Waiting, press  
add illus of handset  
face-up on base  
FLASH  
to take an incoming call without  
disconnecting the current call. Press  
FLASH  
again to return to the first call.  
illus of FLASH lo-  
cations on hand-  
set and base  
16  
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Note: If you do not have any special  
CHANGING CHANNELS  
FLASH  
phone services, pressing  
disconnect the current call.  
might  
The ET-928 continuously scans chan-  
nels (frequency pairs used between the  
base and the handset) and automatical-  
ly selects a clear one each time you  
make or receive a call using the hand-  
set.  
USING TONE SERVICES  
ON A PULSE LINE  
Some special services, such as bank-  
by-phone, require tone signals. If you  
have pulse service, you can still use  
these services.  
If you notice interference during a call,  
IN-  
however, you can repeatedly press  
TCM  
on the handset to try to find a clear-  
er channel. The ET-928 changes to a  
different channel each time you press  
T/P  
P
With  
set to , just press  
when  
INTCM  
.
you want to begin sending tones. Any  
additional numbers you dial are sent as  
tone signals. When you hang up, the  
phone automatically resets to the pulse  
mode.  
Note: You cannot change the channel  
HOLD  
while using  
.
17  
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SPECIAL FEATURES  
2. Enter the number you want to store.  
MEMORY DIALING  
Notes:  
You can store up to 20 numbers of up to  
16 digits each in the ET-928’s memory,  
then dial them with the press of a few  
buttons.  
• If you have pulse service and  
want to send tone signals, press  
TONE  
at the appropriate place  
in the sequence of numbers.  
• Each TONE  
or pause entry  
Storing a Number  
(see “Storing a Pause” on Page  
19) counts as one digit in mem-  
ory.  
Notes:  
• You can use either the base or the  
handset to store and dial numbers.  
3. Press MEM then the number key  
(0120) of the memory location  
where you want to store the number.  
The phone beeps twice and stores  
the number, and all indicators turn  
off.  
• You must complete these steps  
within 30 seconds of each other. If  
you do not, the ET-928 sounds a  
long beep, all indicators stop flash-  
ing, and you must start over again at  
Step 1.  
Notes:  
• You can store special banking or  
telephone service numbers (such as  
access codes or account numbers)  
in memory, but for security pur-  
poses, we recommend that you do  
not store private numbers (such as  
personal identification numbers or  
passwords) in memory.  
• To change a number in memory,  
store a new one in its place.  
• To erase a number from memory,  
repeat Steps 1 and 3, skipping Step  
2.  
1. Press MEM (memory) on the hand-  
set or base. The TALK indicator on  
the handset and the SPEAKER indi-  
cator on the base flash.  
illus of base MEM  
location  
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When calling special services, dial the  
service’s main number first. Then, at the  
appropriate place in the call, press MEM  
and the number for the memory location  
where the additional information is  
stored.  
Storing a Pause  
In some telephone systems, you must  
dial an access code (9, for example) and  
wait for a second dial tone before you  
can dial an outside number. You can  
store the access code with the phone  
number. However, you should also store  
a pause after the access code to allow  
the outside line time to connect.  
Testing Stored Emergency  
Numbers  
If you store an emergency service’s  
number (police department, fire depart-  
ment, ambulance) and you want to test  
the stored number, make the test call  
during the late evening or early morning  
hours to avoid peak demand periods. Al-  
so, remain on the line to explain the rea-  
son for your call.  
To add one or more 2-second pauses to  
a phone number you are storing in  
memory, press REDIAL at each point  
where a pause is needed.  
USING THE INTERCOM  
Note: Each pause entry counts as one  
You can use the ET-928 as a two-way  
pager and intercom between the base  
and the handset. This is useful if the  
handset is away from the base and you  
want to locate it, or if you want to have a  
conversation between someone with the  
handset and someone at the base.  
digit in memory.  
Dialing a Stored Number  
To dial a stored number, when you hear  
the dial tone, press MEM then the de-  
sired memory location number (0120).  
Notes:  
• If the handset is in use when it  
receives a page, the handset beeps  
twice every 4 seconds.  
Chain Dialing Service Numbers  
You can make a call using more than  
one of the ET-928’s memory locations.  
This is called chain dialing. Chain dialing  
is useful for dialing special services such  
as alternate long distance or bank-by-  
phone.  
• If a call comes in during an intercom  
conversation, either of the intercom  
parties can answer the call, but the  
intercom call is disconnected.  
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43-1098.fm Page 20 Tuesday, August 17, 1999 4:03 PM  
• If a call is in progress on the hand-  
set or base when it receives a page,  
you can put the call on hold, then  
answer the page. When you finish  
the intercom call, release hold to  
disconnect the intercom and resume  
the phone call.  
Paging from the Handset to the  
Base  
To send a page from the handset to the  
base, press INTCM. The base beeps  
twice and automatically answers the  
handset’s page (whether or not anyone  
is there). Begin your conversation after  
the INTCM indicator on the handset  
lights steadily.  
Paging from the Base to the  
Handset  
To end an intercom call, press INTCM on  
the base or handset. All indicators turn  
off.  
To send a page from the base to the  
handset, press INTCM. The handset  
beeps twice per second for 15 seconds.  
The base’s INTERCOM indicator flash-  
es while the handset beeps.  
illus of INTERCOM location  
To answer a page at the handset, press  
INTCM. The base beeps twice. Begin  
your conversation after the INTCM indi-  
cator on the handset lights steadily.  
To end an intercom call, press INTCM on  
the base or handset. All indicators turn  
off.  
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43-1098.fm Page 21 Tuesday, August 17, 1999 4:03 PM  
3. Place the headset on your head with  
the earpiece over either ear and  
adjust the microphone boom until it  
is about even with your chin.  
USING AN OPTIONAL  
HEADSET  
Your ET-928’s handset is equipped with  
a headset jack on top. This jack allows  
you to connect an optional headset  
(such as RadioShack Cat. No. 43-194)  
for hands-free conversation — perfect  
for when you are working in the yard or  
garage. You must also have a handset  
holder (such as Cat. No. 43-197, not  
supplied) for the handset so you can  
carry it with you while you use the head-  
set.  
illus -- enlarge  
4. Clip the handset case on your belt.  
Follow these steps to use a headset.  
illus -- don’t show the  
back of the clip; it would  
not be visible if it was  
attached to a person’s  
1. Place the ET-928’s handset in the  
handset holder.  
5. Make or receive calls as you would  
normally.  
2. Insert the headset’s 3/32-inch (2.5  
mm) plug into the  
the handset.  
jack on top of  
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TROUBLESHOOTING  
We do not expect you to have any problems with your phone, but if you do, the follow-  
ing suggestions might help.  
Problem  
Solution  
Low volume or unusual sounds.  
Someone has picked up another phone  
on the same line. Hang up the other  
phone.  
Press VOLUME s on the handset to turn  
up the handset’s volume or VOLUME s on  
the base to turn up the speaker’s volume.  
Noise interference.  
Repeatedly press INTCM on the handset  
to try to find a clearer channel. If the inter-  
ference continues, return the handset to  
the cradle for a few seconds to reset the  
security access protection code, then try  
again.  
You might be moving out of range (see  
“Out of Range Indications” on Page 24).  
Move the handset closer to the base or  
relocate the base.  
Keep the handset away from computers,  
remote controlled toys, wireless micro-  
phones, alarm systems, intercoms, room  
monitors, fluorescent lights, and electrical  
appliances.  
Move to another location or turn off the  
source of interference.  
The phone cannot be operated at a  
useful distance from the base  
because the signal becomes weak or  
noisy (the handset’s range has  
decreased).  
Adjust the base’s antenna so it stands  
straight up.  
Be sure neither antenna is touching a  
metal surface.  
Return the handset to the cradle, and re-  
charge the battery pack.  
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43-1098.fm Page 23 Tuesday, August 17, 1999 4:03 PM  
Problem  
Solution  
The phone does not work or works  
poorly.  
Be sure the base’s phone line cord and  
AC adapter are correctly and securely  
connected.  
The handset battery pack does not  
charge.  
Check the charging contacts on the  
handset and base. If they are dirty, clean  
them with a pencil eraser.  
The handset does not ring or receive  
a page.  
Be sure the handset’s ringer is turned on.  
Adjust the base’s antenna so it stands  
straight up.  
Move closer to the base.  
Move the base away from noise sources.  
The battery pack might be weak. Charge  
the battery pack by placing the handset  
on the base for 15–24 hours.  
Return the handset to the base to reset  
the security code.  
The handset stops working or works  
poorly during a call.  
Move the handset closer to the base.  
Adjust the base’s antenna so it stands  
straight up.  
Be sure the handset’s battery pack is  
charged. (If the battery power is too low,  
it does not have enough power to light  
the BATT LOW indicator.)  
The caller’s voice gets cut off and is  
Press VOLUME s to turn up the speaker’s  
hard to hear when using the speaker- volume.  
phone.  
Press MUTE on the handset to turn off the  
ET-928’s microphone while the other par-  
ty is speaking.  
If you still have problems, disconnect the phone. If other phones on the same line  
work properly, the fault is in this phone or its installation. If you cannot find the prob-  
lem, take your phone to your local RadioShack store for assistance.  
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OUT OF RANGE  
INDICATIONS  
If you move the ET-928’s handset out of  
the base’s range, the handset will not  
operate properly.  
If you move the handset out of the  
base’s range when the handset is not in  
use, the handset’s BATT LOW indicator  
flashes and the handset beeps twice ev-  
ery 16 seconds. When you move the  
handset back within range of the base  
again, the out of range indications stop.  
If you move the handset out of the  
base’s range while a call is in progress,  
two beeps sound through the earpiece  
very 3–4 seconds and the BATT LOW  
indicator flashes, and you and the other  
party cannot hear each other.  
If you move the handset back within the  
base’s range within 30 seconds, the out  
of range indications stop, and you can  
resume your phone conversation.  
If you keep the handset out of the base’s  
range for 30 seconds or more, two  
beeps sound through the earpiece every  
3–4 seconds and the BATT LOW indica-  
tor flashes. After 30 seconds, the call is  
disconnected, the handset beeps twice  
every 16 seconds and the BATT LOW  
indicator keeps flashing. When you  
move the handset back within range of  
the base again, the out of range indica-  
tions stop.  
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CARE AND MAINTENANCE  
Your RadioShack ET-928 Digital Spread Spectrum 900 MHz Cordless Speakerphone  
is an example of superior design and craftsmanship. The following suggestions will  
help you care for your phone so you can enjoy it for years.  
Keep the phone dry. If it gets wet, wipe it dry immediately. Liquids con-  
tain minerals that can corrode electronic circuits.  
Handle the phone gently and carefully. Dropping it can damage its cir-  
cuit boards and cases and cause it to work improperly.  
Use and store the phone only in normal temperature environments.  
Temperature extremes can shorten the life of electronic devices, dam-  
age batteries, and distort or melt plastic parts.  
Keep the phone away from dust and dirt, which can cause premature  
wear of parts.  
Wipe the phone with a damp cloth occasionally to keep it looking new.  
Do not use harsh chemicals, cleaning solvents, or strong detergents to  
clean the phone.  
Modifying or tampering with the phone’s internal components can cause a malfunc-  
tion and might invalidate its warranty and void your FCC authorization to operate it. If  
your phone is not performing as it should, take it to your local RadioShack store for  
assistance. If the trouble is affecting the phone lines, the phone company might ask  
you to disconnect your phone until you have resolved the problem.  
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Cautions:  
REPLACING THE  
BATTERY PACK  
• Use only a replacement battery  
pack of the required type (3.6 V, 600  
mAh rechargeable battery pack).  
If you follow the instructions in “Connect-  
ing and Charging the Battery Pack” on  
Page 11, the battery pack should last  
about one year. If the battery pack will  
not hold a charge for more than 2 hours  
after an overnight charge, replace it with  
a new 3.6 V, 600 mAh battery pack that  
has a connector which fits the socket in  
the battery compartment. You can order  
a replacement battery pack through your  
local RadioShack store.  
• Do not dispose of the battery pack in  
a fire because it can explode.  
• Do not open or mutilate the battery  
pack. Swallowing battery parts can  
be fatal.  
• Be careful not to short the battery  
pack with conducting materials,  
such as rings, bracelets, and keys.  
The battery pack or conductor might  
overheat and burn.  
Install the new battery pack as de-  
scribed here, then charge the battery  
pack for 24 hours.  
• At the end of a nickel-cadmium bat-  
tery’s useful life, it must be recycled  
or disposed of properly. Contact  
your local, county, or state hazard-  
ous waste management authorities  
for information on recycling or dis-  
posal programs in your area. Some  
options that might be available are:  
municipal curbside collection, drop-  
off boxes at retailers such as your  
local RadioShack store, recycling  
collection centers, and mail-back  
programs.  
Note: To avoid losing phone numbers  
stored in memory, try to install and begin  
charging the new battery pack within  
about 2 minutes.  
1. Press down and slide off the hand-  
set’s battery compartment cover.  
illus like 1097-019  
w/batt installed  
2. Gently pull out the battery pack’s  
connector to disconnect it, then  
remove the battery pack.  
3. Insert a fresh battery pack and plug  
its connector with the flat side up  
into the socket inside the battery  
compartment. The connector fits  
only one way.  
4. Replace the cover.  
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43-1098.fm Page 27 Tuesday, August 17, 1999 4:03 PM  
To eliminate interference, you can try  
one or more of the following corrective  
measures:  
THE FCC WANTS YOU TO  
KNOW  
In the unlikely event that your phone  
causes problems on the phone line, the  
phone company can temporarily discon-  
tinue your service. The phone company  
normally attempts to notify you in ad-  
vance. If advance notice is not practical,  
the phone company notifies you as soon  
as possible and advises you of your  
right to file a complaint with the FCC.  
• Reorient or relocate the receiving  
antenna  
• Increase the distance between the  
equipment and the radio or TV  
• Use outlets on different electrical cir-  
cuits for the equipment and the  
radio or TV  
Consult your local RadioShack store if  
the problem still exists.  
Also, the phone company can make  
changes to its lines, equipment, opera-  
tions, or procedures that could affect the  
operation of this telephone. The phone  
company normally notifies you of these  
changes in advance, so you can take  
the necessary steps to prevent interrup-  
tion of your phone service.  
LIGHTNING  
Your phone has built-in protection cir-  
cuits to reduce the risk of damage from  
surges in phone line current. These pro-  
tection circuits meet or exceed FCC re-  
quirements. However, lightning striking  
the phone lines can damage your  
phone.  
This equipment complies with the limits  
for a Class B digital device as specified  
in Part 15 of FCC Rules. These limits  
provide reasonable protection against  
radio and TV interference in a residential  
area. However, your equipment might  
cause TV or radio interference even  
when it is operating properly.  
Lightning damage is not common. Nev-  
ertheless, if you live in an area which  
has severe electrical storms, we sug-  
gest that you unplug your phone during  
storms to reduce the possibility of dam-  
age.  
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43-1098.fm Page 28 Tuesday, August 17, 1999 4:03 PM  
Limited One-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in material and workman-  
ship under normal use for one (1) year from the date of purchase from RadioShack company-owned  
stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-  
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING  
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED  
IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED  
HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABILITY OR RE-  
SPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY  
LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-  
MANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, IN-  
CLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS  
OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDEN-  
TAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE  
POSSIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of in-  
cidental or consequential damages, so the above limitations or exclusions may not apply to you.  
In the event of a product defect during the warranty period, take the product and the RadioShack  
sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, un-  
less otherwise provided by law: (a) correct the defect by product repair without charge for parts and  
labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase  
price. All replaced parts and products, and products on which a refund is made, become the prop-  
erty of RadioShack. New or reconditioned parts and products may be used in the performance of  
warranty service. Repaired or replaced parts and products are warranted for the remainder of the  
original warranty period. You will be charged for repair or replacement of the product made after the  
expiration of the warranty period.  
This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse,  
accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or  
maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs  
other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as  
fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs  
of product removal, installation, set-up service adjustment or reinstallation.  
This warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state.  
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
8A8  
Printed in China  
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