Ericsson EH 237 User manual

EN/LZT1261218
R1
Ericsson EH237
Handheld Telephone fof the TAGS and ETACS
Cellular Telecommunications Networits
User’s Manual
ERICSSON

This manual descrtbes Ericsson EH237,
lype 1341, all versions
First edition (S^ptamher 1993)
This manual b published by Ericsson Mobfis Communlcatfons AB,
withoiJt any warranty. Improvarnents and changes to this rraniial
necessitated by typographical errors, inaccuracies ot current ^nforma
don, Of ImpfovaitiBit^ to prograrns and/of equipment, may be made by
Ericsson Moblic Commar^lcafions 48, at any time and wflhout notice.
Such changes will, however, be incorporated Into new editrons of this
manual.
Alt rights feseivsd-
© Ericsson Mobile Communlcaiions AB. 1993 .
Publicalicn number: ENyLZT 1261216 R1.
Ptirded In Sweden.

APPROVED fw connectfon to
lel&ccKnmunlqaOon systems specified
fn Iho instrudkons for u&a subject
to tf>e oofidEtlDn sel out tn them.
S/120&^4JP/S0276:)
Thte apparatus Is approved for conncclton to any
TAGS cellutar network run by Racal-Vodaterie Limlled
and Cell net (Telecom Securlcor Cellular Radio Limited).
Hie facilities offered by the apparatus are Identlcat on
any network In so far as a natwark Is able to support
any particular factltty^
Service providers can arrange for the necessary adjuslmenls
Ort the natwofk or networks whose service they provide.
Safety and Precautions
• lUtn ofl your cellular lelsptiqne when in an aircraft. The
use of cellular telephenes In an aircraft may be dangerous
to the eperalion of the aircraft, disrupt the cellular network
and is Hlegal. Failure to observe this instruction may lead tc
suspansion or denial of cellular telephone services to ttie
offender, or Iega3 er^on, or bolh.
• Tlrm off your caiyar telephone when at a refuelling point,
• Users are reminded ol the need to observe restrictions on
the use of r^o ec^uipment In fuel depots, chemical ptantSp
or whore blasting operettons are In progress.
• There may bo a hazard associated wKh using your cellular
tetophone close to personal me(Scal efectronic davicTBs, such
as hearing akis and paoerrakers.
• Operation ol your cellufar telephone ckfse to other electron¬
ic equipment, such as televtslorts. radros and personal com¬
puters may cause irvterlerence.
• Do not d^rrKHjnt the antenna. If a child gets rt into the throaty
there may be a suffocation risk.
• Do not attempt 1o dismantie your cellular telephone yoursell .
There are no user-serviceabte parts inside.
• Do not expose your cellular telephone to rain or spHI bever¬
ages on it.
• The telephone package indudes plastic bags. Keep plasllc
bags away from children.

* Hav^ cellular t^epbone installed In a veNde by quali¬
fied personnel.
• H you u^a ydur caUutar t^aphone In a vehicle^ H is advb^d
that a handheld microphone or talaphone handset should
Fiaf be used by the driver while the vehicle is movingp ex¬
cept in an emer^ncy. Speak only Into a Timd neck slun^ or
clipped-on microphone when rl would noi dislreci your alien-
tlon from the road. Do not stop on ihe hard shoulder of a
motorway to answer or make a call, however urgent.
m Use only Charger 4225 and AC/DC Converter 4222^11 K,
Charger 4226 and AC/DC Convertef 4222-iJK, or TraveE
charger 4221*‘UK with this telephone. Ll$e Ofl any other bat¬
tery charger arKt/or AC/DC Converter will invalidate any ap'
provaJ given lo this telephone and may be dangerous.
Battery Infomiation
A battery that is detlvered with the phone is not charged. How¬
ever, there may be enough power to turn the phone on.
Before us^ng the phone, it is recommended that you condHion
the baUery by lirst chari^ng It, and then dlsharging H, three times
in successiorT. See ihe chapter Bstteries and Recharging lor
intomnation about batteiy [::onditk}ning.

Table of Contents
Satoi/ anti Precautions III
Battory Informafen Iv
Introduction
About tha Phone
What Ttvs Manual Contains
Road (he information
troTTi Vbur CoHular OpersTor!
Dc5 You Wert Anoiher language
In the Display?
1
1
3
3
4
Basic Operation 5
Attaching tha Banety
S
Tumlng the Phone On
5
Entering a Phone Number
7
Making a Cali
3
Caff Time Meter
3
Audibfs Cati Timer 3
Caff Unit Meter
9
Ending a Catt e
Last AiiLrmbsf Ffe-dtaf 9
EmBfgBficy Caffs
9
Receiving a Call
10
Ending a Caff
10
Unanswered Catis
10
Volume Conifoi
10
Two tnOependent Votume SeWnga 11
Micropharka Mule 11
Hook Flash
11
Scratch Pad during a Conversation 11
Keypad Lock
11
Turning Ihe Phone Ofl
12
Batterws and Rechargir^g
13
BanorleB
13
inserting and Ramaving a Battery 13
Battery Meier
14
Low Battery Aiarm 14
Battery Discharge
14
Recharging a Battery
15
Using the Standard Charger 15
Concflionlng a Battery 17
Battery Care and Malrrtenenoe
17
Bell Clip
19
Details on the Display and Ke^s 1 §
Display 19
Atf^imumeric Fieici 19
Ntifuark; Ftski 19
Siaius indicaior^ 19
Keypad 20
HlumhaJiqn 24
AjLKllhle Signals 24
Ffmging Stgnai 24
Low Bemery Aiafm Sign^ 24
Error Sigrrai 24
Conitfrmtion CifCk 24
Koy CifCk^ or Tones 25
Visual Signals 25
Using the Dulling Memory 27
Using rlie DiaJring MBmory
as a Scratc*!^ Pad 27
Last Number Redtai 27
Recallirtg the Number Lael Called 27
RBGBlIlfiQ the Olhet Numbers 27
Reviewing the First Digits i1 a Recaited
Number Cnnlejns N^are Itian IQ Digits 29
Storing Numbers 29
Storing a Number (ar>d Name} 29
Msmory Protectton 30
Msmoty Puff 30
Erasing a Stared Number (and Name) 30
Soma Hirrta 30
« and i 30
Numbers 3t
Memory Locations 1 tolO 31
Recalling Numbers 33
Numeric: and Alphabetic Mode 33
Reeling a Number
usi ng Numeric Mode 33
Sc^foWnf through the Memory 33
Speed CaiHrtg 33
Recalling a Number
Using Alphabelic Mode 34
Scrolling through the Memory 34
V

RsviBwng iha Fifst Digits rt a Recalled
l^umber Contain Mote Ihan TO Dlgrts 34
Appendlng Prgits iQ a Racalled Nu mber 34
RapEacing lha Last Dtglls
of a Retried Number 34
^Hiddan" Memory Locatforis 35
Storing a Number (and Name) 3S
Sending a Number 35
Revloi^rig a Nufnbar 3 i
Erasi ng a Nymbet (and UawE ) 36
DTMF Sl^nalflng 37
Auiomaftc DTMF 37
DTMF Mode 37
DTMF Pause Funetiao 38
Using Se venal Fatjse^ 38
Pre-programmed DTMF Signaliing 39
A Mini 39
Special Functions 41
Accessing a SpedaJ Furvcbon 42
A/ieirrafj'v^ iMoffsod for Accessing
a Special Func^on 43
A Combination of ths Two AfefJ^cnJ^ 43
Leawng a Funcr^n 43
Changing a Setting 43
Sloring a New Setting 44
Ringing Sig nal Volume 45
Zr Ringing Signal Tone 45
3. Key Clfcks, Ksy Tones
nr Silent Keyp^ 45
4. Minule Minder 46
5. Badk Light 46
6. Display Conirasi 46
7. Automatic Ra-try 46
5. NAM Selectinn 47
6. Country SelactJon 47
10, VcicB-ActivaJed
Answering 47
11- Etecrronic Lock - Cal Rsslridiojvs 48
Changing Your Secujrjy Code 48
Lodging ifts Pbone or
Changing fhe ioc9c ievei 48
Unfocking the Phone Tsmporanfy 49
Untocking the Phone PenmnBnUy 49
12. Language Selection 49
13l Cal Counter 49
Ffeadin^ Off the Caff Caonter 49
PlasBttfng die Caif Counter 49
14. Laat Cali TlmB/tasi Caif Unlls 50
15. Resattahte Total Call Tmei
Rssatti^le Total Call Units 50
Reatdng Off m Totaf Caif Time/
Calf Units Meter 5Q
Resetting the Calf JJmef
Caif Units Mater 50
16. Tola! Call TTtW
Total Call Units 50
17. Channel Display 50
18. Battery Voltage 5t
19. Enquiry Number 5t
20. Emergency Number 51
Acc659Orl03 53
Handsftee Usage In a Vohktte 53
Operation 54
Portable Handsfree 54
VehldB Fpwst Charger and Travaf Charger 55
Problems You Can Solve 57
Phone Does Not ComB On 57
Rhnklng Rad indicator Light
“ Alarm Signal &iunds 57
Steady Orange I ndlcalor (Jghl 57
NO SVC {Nd Service) Shows
Continuously In- the Display 57
Rec^Bived Signal Is Weak 57
ANTENNA Is Displayed. 56
LOCKED Is DlfipHayad SB
KEYLOCK ts Displayed 58
No Feedback Clicks or Tonas Are Heard
when You Pfsss Ihe Keys 58
Appendix:
Calling Line Idantlf^oation 59
tncqming Call 59
Calls In Absence 59
CLI Memory 59
Recaifing e hfuntter
&WTr the CU Memary BO
Erasing a Number
from the CU Mamory BO
TraiisiBrnng a Numf^r
to Parmanem Sfa/?igi& 6D

Introduction
About the Phone
Battery
Indication
Diipidy
> ^ypad
\
MicrophofH
This phone is a wry sirtall and light handheld celMar phone
which Is sifnple 1o use. After yew have tumed H on. you can
use it in muc^ the sarne way as any other phone.
However, a cellular phone operaiss by usir^ radio senate
which can be subject to imerferenoe. It may sometimes
happen, therefore, that you need to move the phone to a
position where you can obtain a better radiio signaJ.
Indoors, It is usually best lo use the phone near a window.
1

IntroductJofi
Display and Keypad
JlLCtJ 01
Atphanumerlc field
0 t^3'iS6^89
Numeric Held
PWR A V 1
Status IndkatDis
Numeflclift^
TTite key has two dltterent functions: Power and End.
Power. To turn the phone ON or OFR press and hold
down the key for ^ feast half a second. A dtak confirmB
when tfie phone is actually turned on or off. You cannot,
however, turn the phone oH when a can Is in progress.
End. To temrunate a call
press the key mofnemarlly.
2

Introduction
What This Manual Contains
This manual Is provided to help you use your phone.
Keep H tiandy lo arisww (!fUBstione you mAy h^vo.
The next chapter. 8as9c OfXfstton. descnb^ the most
esserrUal operations:
• Turning the phone on/ofl.
• Mah^ng calls and arswering calls.
Correcl care wtll prolong ihe Hfe o1 a batiery and ai^ the
length of time between recharging. You should, Iherelore.
read Ihe third chapter, Batteries and Racdarging, care-
fLily.
To leam mom about the display, Mh its status Incticators,
and the functions of the varfcHis keys, you should raad the
fourth chapter. Deiaits on the Display and Kays. Also the
phone's audibie and visual signals are dealt with in this
chapter.
Then you can go on to read about the itiore advanced func¬
tions, including, for example:
9 Storing a phone numloer and an accompanying name in
the memory ol the phone.
9 Hecelling a phone rrumb^ from memory, by entering the
name, or part of the najme {Alphabetic Mods), or by enter¬
ing the number of the memory location (Numeric Made).
9 Perfoiming tanking by phone" and utilesing other services,
by means of DTMF SIgnadllrig.
• Using the Special Fixnirttons, for example, the Electron¬
ic Lodi to restr![:;;t the use at the phone by somebody
else.
OpIlonaJ equipnmtt that can he used with the phone, for
example a har^free system tor use in a vehide, is dealt
with In the chapter Accessories.
The Probietm You Can Solve chapter at the end of the
manual could S5we the cost of unneoessary service. It lists
soma simple things to be checked before calling tor service
personnel.
Read the Information from Your Cellular Operator!
Vou should also read Ihe operating Instructions from your
network operator about coverage areas of the cellufar net¬
work and ser/ices such as calf forwarding (calf divert] and
calf bannrtg.
3

Intrcducllon
Do You Want Another Language in the Display?
Yaur phon^ b nonnaliy dsllv^riad wWh English in ths
display. Special Function No. 12. allows you lo select a 1^-
guage other than English^ Refer to (he chapter Special
FunciionA
4

Basic Operation
Attaching the Battery
Turning the Phone On
Press aftd hold down the Power key until yw hear a ctick.
Attaching a battety, witi also turn the phona on
The battery meter and the PWH (Power) Indicator come
on in the display. The phono's owrt number Is dysplayed
briefly.
rfl 5l'C
1816543^ 10
pm t
*)
PCflU'/
S
I
Battery Own Signs! streoglti
meter nimbef meter
The message NO SVC (No Serves) Is ^splayed, too.
Hcraveuer, once service Is available tnorn t^ oelkjiaf net¬
work, usually within a tew seconds, the message MO SVC
disappears from the display and, instead, the message
BEADY comes on, In addHior}, the Indicator IlgN on the top
5

of the phone, blinks green al a caie. You can now make
and receive calls.
A signal sirength meter is shcMn on the righi of ihe dis¬
play, n indicates the strength of ihe received signail, 1 to 5.
A value Of 5 Indicates a almng signal.
The battery meter is shown fcn the shape o1 five bars. They
indicate the condition o4 the battery attached to the phone;
the rnore bars shown, the better Lhe concftion o1 the bat¬
tery. You can read more about this In the nasd chapter,,
Bsu&iies and Rsc^wg^ng.
Note the toitowtng pofnte:
* ir the message NO SVC shows continuously, you have
lost contact with the celluiar network and canmt, therefore,
or receive any calls. Refer to the chapter Pfob-
terns ybtp Can SoA/e al the end of this manual ter fur¬
ther irrfcrmaiien.
• If no signal strength is shown, or the signal strength is low,
try moving the phone or the s/ehide to obtain a stronger
sigr^. Reter to the chapter Prohtems You Can Solve.
* If the Indicalor A (Roaming) shows continuously, or
blinks, in the display,, it indicates Itiat the phone is used In
a network other than its home network.
# tf the message LOCKED is shown, instead of the mess¬
age READY, the phone is locked, telly or partially, to pre¬
vent outgoing caffs. Refer to the description d Spedal
Function No. 11 . Electronte Lock in The chapter Spediaf
Funclfons.
■ If the message KEYLOCK is shown, the keypad ie locked
to prevent unintentional key action. Refer to the section
Keypad Lock e\ the end of this chapter.
• If the message ANTENNA comes on, H indicates that Ihe
antenna hs not connected- Turn the phone csfl, and aitach
the antenna. Nemr remove or attach ^he antenna when
thB phone is oOr

Bask: Oiperabmi
Entering a Phone Number
if anything is sh<mf} (n thB numSfie fieid Qf thg di^ay,
sraSa ft hafors aotaring the phona numpgr using the C
(deaf} Hey.
A phone number lo be calledn or stored \n men^iory, Is erv
lered on ihe numerk; keys. The digits you enter are shown
in the rtutmefic field el Lh# d^ay.
As each digit is entered, a dick or tone is heard; unless the
key dicks or key tones have been turned oil with SpedaF
Function No. 3. Key ClIckSp Key Tones or Silwift Keypad.
Refer to the chapter Speciaf Fun^ons.
Atwsya tisg the ama eod&:
Note that there ere no local calls when you are caJNng from
a cellular phone; you must always indudo the area code
(STO code) before the desired number. The only e?<ceptjons
to Ihls are certain oeUular service numbers.
//you enters wj^on^ dtgtt or a wrong number:
If you ertler a wrong digit you can erase it by pressing C
(Clear). You can press C repeatedly to erase several digits^
one at a time.
To erase all digits simunaneously. press hold down C
until the dlgiis dsappear from the display.
if a number contains more than W digits:
If you eoter a numbef with more than 10 digHs, the first
digits will disappear from Ihe display.
Check these digits, press M (Mode), followed
^ ^ \ _/ by 0. CHECK Is displayed, together with the tSgIts.
7

Bosk; Operation
Making a Call
T7)e phone musr be turned on and the message HO SVC
musf not be dis^yed.
Enter tha number, including Ihe area ccxle, and press Send.
The symbol comes on in Ihe display.
When you have made csotiAact with the celluJar network, Ihe
message CALLING will be displayed.
When you are connected to the desired phone number, the
message CALLING and the phone number disappear from
the display and a dick is heard. C^y then need you hold the
phone to your ear. """
Call Time Meter
During an outgoing call the elapsed time, in mirv4e$ and
seconds, is displayed.
Seconds
MlrtulBs-
a
Audible Call Timer
H Special Fynction No. 4, Mnute Minder Is luiDsd on, a
dick is heard in the earphor>e or handsfree speaker every
full minute during the ckl To turn the audide tali timer on,
refer to the chapter Spectat Funcdone
Call Unit Meter
On spedal request, the number of call units car^ be dis¬
played. instead of Hie elapsed lime, provided the chosen
cellular network offers this facility.
c:^
The audltie caW bmer is avtomaticafiy disabied it the ceit
unit option is chosenr
Ending a Calt
When the conversation is finished, press End
The symbol c^sappears from the display but Hie
elapsed call time {the number of call unfls) appears tor an
additional five seconds.

Basic OpcraHcin
tf nobody snswerSf or you hear an engaged or
equipment*engaged form, or you raveive a wcorded
messago thai a number ta unottafnabfe:
N Press End. Tba phana number wlU be retained In memory
J and you can easily repeal the call. See Lasf Number
^ Re*dla( below.
It B beep is heard
and the message NO ACCESS fa dt^pfayed brieffy:
The cellular network Is busy and cannot process your cali.
The phone number disappears from the display. It wilL how¬
ever, be retained in memory and you ra:n easHy repeat the
cal. Sea Last Number Re^iat below.
if tiffmd on, Spedai Function No. 7. Re-try.
win automaiicafiy re-d'af the number. See the chapter
Spedai Funct/ons
if a beep is heard
and the phone number remains in the df&piayi
EHher the messa'pe NO SVC is displayedi or the signal
strength Is loo low. Refer to the chapter Probiems Vbi/ Can
Solve at the end of this manual for further irrformation.
*
Last Number Ro-dial
C nacassary, dear the numeric field ol the display, using
Ihe C (aear) key,
f Press followed by Send, to pnake the call.
^ Vt—LASTOIAL te displayed, together with t+w number last
called.
See also the chapter Udng the Dialing Memory.
Emergency Calls
One Of more emergency numbers can be programmed into
your phone,
CJ^T) fj ^ emergency number, press M (Mode) foJ-
- ^ lowed by T* (down). EMERGENCY is displayed, logeth-
or wHh the first mjmber.
II more than one emergency number Is pvogramrr^ed^ press¬
ing any nurnehc key (repealedy) will dsplay the numbers.
To call the number displayed, pras$ Sejid
3

Baaic Op«raUon
Receiving a Call
Uiepfjone must be fumed on sndlhe message WO SVC
must not be dispiayed.
When you called, the phone Hn^. At the s&mB lim^p
the meaaaga CALL appears In the dlep^y. The indcalor
light on the top of the phone Winks green al a last rate.
Press Send to aitswsr.
tf tbs teiephone is used wth hendsfre^ equipment, you
oan pre^ any key to answer a cafi TtmB is aiso a Spe^
ciaf Funothn, Nq. 10 \^oice-Acttvsted Answering that
atfows you to answer a cafi by usifjg your voice. Refer to
the chapter Spedat Functions.
Ending a Call
When the conversation Is finishedl. press End.
Unanswered Catls
It a call Is not answered, Ihe Indicator Nght on the top of the
phone will continue to Wink green at a fast rate, Indicating
lhal fiornebody has called you.
The number of unar^owered calls will also be displayed,
fotloWBd by the word CALL or CALLS, lor example 1 CALL
or 2 CALLS.
The blinking indyoator light arvi the number-ol-unanswered-
cdlis inWcation wllf go out II you press Send, M, R/S or C.
Volume Control
During a conversalion. you can adjust the volurne of the
earpiece, or lha handsfree speaker, with these keys.
Press ▼ # (down) momenteiily to decrease the vWume
and # ▲ (up) momentarily to increase Ihe volume. Each
lima you press ▼ ^ (down) or # A (up) momerrtarlly, the
volume Is altered by one step, Ihe full range being seven
steps.
The volume seding Is shown in Ihe display. The rmre Os
that are shown, the higher the volume. The vdu me setting
remains in the dlsf^ay two ^conds atter ▼ * (down) or
MA (up) was Iasi pressed.
©(S)
10

BasJc Ofwfvtjoii
t'OLoooo
IWo Imiependeni Vblume Sottfngs
You can have one setting when you use the phone b& ^
handhetd unit and another setting when you use tt$ £is a
handsfree phone. 8cnh settings wiH remain unchanged,
after the phone has bean turned off.
Microphone Mute
C M ^ During a con^r&alion, you can deactivate the microphone
(or the handsfree speaker] by hetcHrig down M (Mule),
The word MUTED is shown in the display.
To resume the conversation, release the M key.
Hook Rash
Pressing Send during a call sends a hook Bash. Thbs is
used to activate or cancel certain cellular servicae such as
call waihog and conference calls.
^ these caitytarservices uniess you
>—have sijbscribed to them.
Scratch Pad during a Conversation
You can use the display as a scfatch pad during a conver¬
sation. H the person you are talking to gives you a phone
number, you can enter rt as H is given to you.
After you have ended the caW, the number remains ferr the
display, and you can call It by pressing jist Send. The num¬
ber ISr however, stored automaiicaily in memory tocafion 1
ot the phone's cfialilng mamory so that you can call it later if
you do not have the opportunity to make the can a! once,
Hefer to the chapter Ustng me DlaHing Memory
Keypad Lock
If the phone ^ used as a hamlherd unit, you can lock Ihe
keypad so that unlntentionai key action has no effect If the
phone is turned on. Thte feature te useful when you, lor
example, are carrying the phone in a pocket.
11

Basic OperaUcin
You can, however, cali the emergency numtim pro¬
grammed fnto the phone, when the keypad is locked.
The Keypad remains locked until you:
« answer an incoming call
« replace the battery, ar
« unlock the keypad yourself.
cm
To lock the keypad:
Press M (ModeJ^ followed by Power/Ejid.
KEYLOCK is displayed.
To unlock the keypad;
Press M, followed by Power.''End.
Turning the Phone Off
To turn the phorte olt, press and hold do¥m the Power Key
unflf a click is heard.
T2