MaxTech xm144ic V.32bis User manual

High Performance
V.32bis/V.42bis
14,400 BPS Internal
FAX/Voice/Data
Modem
User's Manual
Contents
Section One Introduction ........................... 1
Section Two Installation ............................. 1
Section Three AT Command Set .................. 6
Section Four S Register Summary ........... 12
Section Five Result Codes......................... 13
Section Six Troubleshooting ................... 14
Section Seven Specifications ....................... 16
Section Eight Support And Service ........... 17
Section Nine FCC, DOC, Copyright And
Other Notices ....................... 17
Part #MAN0017 Rev 1.1 CL-MD1414ECT-SP
Featuring Advanced
Speakerphone Functions

1
Section One - Introduction
The 14.4 Kbps Series FAX/Voice/Data Modem con-
nect your computer to all popular high speed modems
available today. This manual describes the hardware instal-
lation procedures for your new modem product. Additional
information on AT commands and S-registers are provided
so that your system can be customized for a particular
operatingenvironment.
Section Two - Installation
This section will provide step by step instructions on
howtoinstallyournew14.4KbpsFAX/Voice/Datamodem.
Installation of this modem product is a two-step process
consisting of actual hardware installation and communica-
tion software installation and configuration.
2.1 Unpacking Your Modem
Beforeyoubeginyourinstallation,becertainthatyou
have all the items listed below. This package contains:
• A modem • A telephone cable
• User's manual • Software for the modem
• Software user's manual
2.2 Hardware Installation
Installation of this modem requires opening and ma-
nipulating your PC. Exercise caution at all times when
working with AC powered and static-sensitive equipment.
Turn off and unplug your PC before installation. Discharge
any static electricity from your body by touching any metal
surface.
1. Turnoff and unplug your computer from the AC outlet.
2. Determine how many serial ports are built into your com-
puter(examinethebackofyourcomputer).RefertoFigure
2-1toidentifycommonserialports.
male connector
Figure 2-1 Common Serial Ports

2
3. If you have one or more serial ports on the back of your
computer,reconfigureyourmodem.Yourmodemisshipped
set to COM1 on IRQ4. Reconfigure the modem to either
COM3/IRQ5or COM4/IRQ2(refer to Table 2-1 in Sec-
tion 2.4).
4. Removeyourcomputer'scover
(refertoyourcomputer'sowner
manual).
5. Select any available half-card
slot, and then remove the slot
cover(refertoFigure 2-2).
6. Carefullyslidetheinternalmo-
demintotheslotyouhavecho-
sen,applyingevenpressureun-
til the modem is completely
seatedintheslot.
7. Fasten the retaining bracket
withthescrewfromtheslotcover.Makesurethemodemis
properlyaligned.Storetheslotcoverforfutureuse.
8. Replacethecomputercoverandpluginyourcomputer.
9. Connect the telephone cable from the modem (“LINE”
connector)tothetelephonewalljack.
10. Optionally connect: 1) your telephone to the modem's
“PHONE”connector,2)aspeakertothemodem's“SPKR”
connector, and 3) a microphone to the modem's “MIC”
connector.Notethatthedistancebetweenthemicrophone
and the speaker must be greater than twelve (12) inches
to prevent unpleasant speaker feedback.
11. Turn your computeron. Yourmodemis nowinstalled.
2.3 Software Installation/Configuration
Youarenowreadytoinstallandconfigurethecommu-
nication software. Refer to your software manual for instal-
lation procedures. Your software must be configured to
communicate with the modem on the same COM port and
IRQ line used by the modem.
If you are using Microsoft Windows 3.x and have
changedthemodem'soperatingsettingfromthedefaultCOM1/
IRQ4toCOM3/IRQ5orCOM4/IRQ2toavoidaconflict,you
must use Windows' Control Panel (in the “Main” Group
withinProgramManager)toconfigureWindowstorecognize
the new settings before installing any software. In Control
Panel, double-click on Ports. Click once on the icon for the
Com port you have set your modem to. Click the Settings
button. Click the Advanced button. The Base I/O Port
Figure 2-2
Expansion
Slots

3
AddressshouldalreadybesetbyWindowstotheCOMport
addressusedby the modem (refer to Table 2-1). Change the
Interrupt Request Line (IRQ) to match the IRQ on the
modem. If you have set the modem to COM4/IRQ2, do not
selectIRQ2.YouwillneedtosettheIRQinControlPanelto
IRQ9forWindowstorecognizethemodem.(Inanoperating
system designed for 286 or better machines, IRQ 9 is
equivalent(redirected) to IRQ2.)
A modem setting which skips one or more COM port
assignments requires special attention in the Windows 3.x
Control Panel. For example, if your computer is equipped
with two serial ports (COM1 and COM2) and have set the
modem to COM4 instead of COM3, the Control Panel
settings for COM4 may say Default. In this case, Windows
3.x will operate the modem as the third serial device and
recognize it as “COM3” (This unusual COM port reassign-
ment does not occur in future releases of Windows). The
correct COM4 address (2E8) has been placed into the
ControlPanelCOM3position.ConfiguretheCOM3entryin
ControlPanelbychangingtheIRQboxtomatchtheIRQthat
has been set on the modem. (When running any Windows
3.x-basedcommunicationorfax programs, select COM3 as
the COM port for the modem.)
Afterthesesettingsaremade,clickOK.ClickRestart
Now. Windows can now recognize your modem.
Note: Since the “COM3” substitution for your
COM4 modem only occurs under Windows 3.x,
your DOS communication and fax programs will
still recognize the modem configuration as COM4.
Wesuggest the followingcommunicationparameters
when you first use your data communication software.
Consult the software manual for information on using these
and other parameters/features.
38,400 bps; 8 data bits; no parity; 1 stop bit; RTS/
CTS flow control set to “on;” initialization string:
AT&F
The commands used by the modem are compatible
withthecommandsetusedbyIntelmodems.Selectan“Intel
144I Faxmodem” type in your data communications soft-
ware, select a “Generic Class 1” type in your fax software
and select “Cirrus Logic” in your Voice software.

4
2.4 COM Port and Interrupt Settings
If your computer is equipped with one or more serial
ports, you will need to change the COM Port setting on the
modem (to either COM 3 or 4), or disable the PC's built-in
COM port.
AnIRQ (interrupt request) is asignal generated by an
I/Odevicethatnotifiesthecomputerofincomingdata.Your
internal modem is capable of accessing IRQs 2, 3, 4, and 5.
I/O devices in your computer cannot share an IRQ with
another device at the same time. Since IRQs can not be
sharedatthesametime,COM3isgenerallyconfiguredtouse
IRQ5,andCOM4touseIRQ2.ThisavoidssharingofIRQs
with COM 1 (IRQ4) and COM 2 (IRQ3).
TochangethedefaultCOM PortorIRQsettingsfrom
COM1/IRQ4toanothersetting,locatetheSwitchBlock on
your internal modem (Figure 2-3). Refer to Table 2-1 to
configure the Switch Block to the COM Port and IRQ
Table 2-1 Switch Block Settings
SW-1
Figure 2-3 Switch Block SW-1 Location
COM Port IRQ SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6
1 (3F8)
default 4ON ON OFF OFF ON OFF
2 (2F8) 3 OFF ON OFF ON OFF OFF
3 (3E8) 5 ON OFF OFF OFF OFF ON
4* ON OFF OFF OFF ON OFF
4 (2E8) 2(9)** OFF OFF ON OFF OFF OFF
3* OFF OFF OFF ON OFF OFF
* UsetheseIRQsonlyifyoursoftwarecannotaddressIRQ5orIRQ2
** WhenusingWindows withthe modemset forIRQ2,select IRQ9in
ControlPanel

5
combination needed for your application. Any time the
COM or IRQ setting for the modem is changed, the
settings in the software must be changed to match.
2.5 Using Fax, Voice, and Speakerphone
Capabilities of the Modem
Your modem has built-in advanced FAX, Voice, and
Speakerphone functions. These functions are accessed
throughsoftware. PleaseconsultyourFAX/Voice/Speaker-
phone software manual about procedures on using these
functions.Notethatthemodem'sFAX/Voice/Speakerphone
commands are used by the software to implement these
functions and are not designed to be used as standalone AT
commands.
Voice functions include recording and playback of
voiceprompts(files).Torecordorplaybackvoicewithyour
modem, attach a telephone to the RJ-11 jack marked
“PHONE”onthebackofthemodem.Followspecificinstruc-
tionsintheFAX/Voice/Speakerphonesoftwareonrecording
and playback of voice prompts.
2.6 Testing Your Modem After Installation
In order to test your modem you should be familiar
with your communication software. Load and set up your
communication software and enter into “terminal mode.”
MakesurethattheCOMPortandIRQsettingsofthemodem
match the software. Type AT on your terminal screen and
press ENTER. You may see “AATT” or nothing on the
screen.Ineithercase,themodemshouldrespondwithanOK
or0.Ifitdoesnot,pleaserefertoSection2.4forinformation
on COM Ports and IRQ’s or Section 6 for troubleshooting
information.
2.7 Using Your Modem
Thecommunicationsoftwareincludedwithyourmo-
dem product provides a user friendly interface to access the
fax,voice,anddatafunctionsofyourmodem.Thissoftware
should be sufficient for all of your communication needs.
There may be times when you need to access the modem
manually via modem commands. Read Section 3 for a
summary description of the modem command set before
manually accessing the modem. You may want to read the
softwaremanualfirst,however,asthesoftwaremayalready

6
provideauserfriendlymethodofaccessingthefunctionsyou
need (i.e. dialing or answering calls).
2.8 Where To Go From Here
You should familiarize yourself with the functions
available from the included software by reading its manual.
You will be accessing most, if not all, of the modem's
functions from this software. You may also use any other
commercially available communication software with the
modem. Read Section 3 ONLY if you are interested in
accessingthemodemmanually,andnotthroughtheincluded
software.Section4and5containreferencematerial,andcan
be skipped. If you have difficulties getting your modem to
work, read Section 6, Troubleshooting to find answers to
commonly asked questions and problems.
Section Three - AT Command Set
3.1 Executing Commands
Commands are accepted by the modem while it is in
Command Mode. Your modem is automatically in Com-
mand Mode until you dial a number and establish a connec-
tion. Commands may be sent to your modem from a PC
running communication software or any other terminal de-
vices.
Yourmodemiscapableofdatacommunicationatrates
of: 300,1200, 2400, 4800, 9600, 14400,19200, 38400, and
57600 bps. Make sure your COM port baud rate setting in
your communications software is set to one of the above
speeds.
3.2 Command Structure
AllcommandssenttothemodemmustbeginwithAT
andendwithENTER. Allcommandsmaybetypedineither
upper or lower case, but not mixed. To make the command
line more readable, spaces may be inserted between com-
mands. If you omit a parameter from a command that
requires one, it is just like specifying a parameter of 0.
Example:
ATH[ENTER]
This command causes your modem to hang up.

7
3.3 Basic AT Commands
Inthefollowinglistings,alldefaultsettingsareprinted
in bold text.
Command Function
AManuallyanswerincomingcall
A/ Repeatlastcommandexecuted.Donotprecede
A/with ATorfollowwith ENTER
AT Appearsatthebeginningofeverycommand
line
B_ B0 CCITTmode
B1 Bell mode
D_ 0 - 9, A-D, # and *
P pulsedialing
R originatecallsinanswermode
T touch-tonedialing
W waitforseconddialtone
, pause
@ waitforfivesecondsofsilence
! flash
; returntoCommandModeafterdialing
DS=n Dialoneofthefourtelephonenumbers(n=0-
3)storedinthemodem’snon-volatilememory
E_ E0 Commandsarenotechoed
E1 Commandsareechoed
+++ TIES EscapeCharacters-SwitchfromData
ModetoCommandMode
H_ H0 Forcemodemon-hook(hangup)
H1 Forcemodemoff-hook(makebusy)
I_ I0 Displayproduct-identificationcode
I1 FactoryROM ID
I2 Internalmemorytest
I3 DeviceID
I4 InternalID
L_ L0 Lowspeakervolume
L1 Lowspeakervolume
L2 Mediumspeaker volume
L3 Highspeakervolume
M_ M0 Internalspeakeroff
M1 Internal speaker on until carrier detected

8
M2 Internalspeakeralwayson
M3 Internalspeakeronuntilcarrier detected and
offwhiledialing
N_ N0 Connect only at DTE rate
N1 Automaticratenegotiation
O_ O0 Return to Data Mode
O1 ReturntoDataModeandinitiateanequalizer
retrain
P Set Pulse dial as default
Q_ Q0 Modem sends responses
Q1 Modemdoesnotsendresponses
Sr?r=0-30 Readand display value in register r
Sr=nSet register r to value n (r=0-30; n=0-255)
TSet Tone Dial as default
V_ V0 Numericresponses
V1 Word responses
X_ X0 HayesSmartmodem300compatible
responses/blinddialing
X1 Same as X0 plusall CONNECTresponses/
blinddialing
X2 Sameas X1plusdial tonedetection
X3 SameasX1plusbusysignaldetection/blind
dialing
X4 Allresponsesanddialtoneandbusysignal
detection
Y_ Y0 Modem doesnot sendorrespondtobreak
signals
Y1 Modemsendsbreaksignalforfour seconds
beforedisconnecting
Z_ Z0 Reset and retrieve active configuration
profile 0
Z1 Resetandretrieveactiveconfiguration
profile1
3.4 Extended AT Commands
&C_ &C0 ForceCarrierDetect Signal High(ON)
&C1 TurnonCarrierDetectsignalwhenremote
carrier signal is present
&D_ &D0 ModemignorestheDataTerminalReady
signal

9
&D1 ModemreturnstoCommandModeafter DTR
toggle
&D2 Modemhangsup,returnstotheCommand
Mode after DTR toggle
&D3 ResetsmodemafterDTRtoggle
&F_ &F Recallfactorydefaultconfiguration
&G_ &G0 Guardtonedisabled
&G1 550 Hz guard tone
&G2 1800 Hz guard tone
&M_ &M0 Asynchronousoperation
&P_ &P0 UnitedStatessettingforoff-hook(make)-
to-on-hook(break) ratio
&P1 UKandHongKongoff-hook(make)-to-on-
hook (break) ratio
&S_ &S0 Force DSR Signal High (ON)
&S1 DSRisoffincommandmode,oninon-line
mode
&T_&T0 Ends test in progress
&T1 PerformLocalAnalogLoopbackTest
&T3 PerformLocalDigitalLoopbackTest
&T4 GrantRemoteDigitalLoopbackTest
requestbyremotemodem
&T5 DenyRemoteDigitalLoopbackTest request
byremotemodem
&T6 PerformaRemoteDigitalLoopbackTest
&T7 PerformaRemoteDigitalLoopbackTestand
Self-Test
&T8 PerformLocalAnalogLoopbackTestand
Self-Test
&U_ &U0 Enable Trellis Coding @ V.32
&U1 DisableTrellisCoding @V.32
&V_ &V0 DisplaysActiveandStoredProfile0
&V1 DisplaysActiveandStoredProfile1
&W_ &W0 StorestheactiveprofileasConfiguration
Profile0
&W1 StorestheactiveprofileasConfiguration
Profile1
&Y_&Y0 ConfigurationProfile0activeuponPower
on or reset
&Y1 ConfigurationProfile1activeuponPoweron
orreset

10
&Zn=x n=0-3 Storetelephonenumberxintonon-volatile
RAM
%E_ %E0 V.22bisauto-retraindisabled
%E1 V.22bisauto-retrainenabled
%G_ %G0 EnableAutoFallForward/Back
%G1 DisableAutoFallForward/Back
3.5 MNP/V.42/V.42bis Commands
%Ann=0- Setauto-reliablefallbackcharacterton(where
127 n=0to127,ASCII).Requiresthe\C2setting
%C_ %C0 DisableMNPClass5datacompression
%C1 Enable MNP Class 5 data compression
\A_ \A0 64-charactermaximumMNPblocksize
\A1 128-charactermaximumMNPblocksize
\A2 192-charactermaximumMNPblocksize
\A3 256-character maximum MNP block size
\Bnn=1-9 Senda 1/10 second line break to the modem,
where n = 1 to 9. At normal connect, the
default is 3
\C_ \C0 Do not buffer data during LAPM/MNP
handshaking
\C1 Bufferalldatafor4seconds, until receiving
200 characters or until a packet is detected
\C2 Donotbufferdata;switch to normalmode
whenfallbackcharacterisdetected
\G_ \G0 Disable DCE flow control
\G1 EnableDCEflowcontrol
\J_ J0 Disable serial port data rate adjustment
(keephighdata rate between DTE and
modem, regardless of modem-to-modem
datarate)
J1 Enable serialport data rateadjustment so
serialdatarateautomaticallyadjusts tomatch
themodem-to-modemdatarate
\Knn=0-5 Set break control, where n= 0 to 5. Default
is 5
\N_ \N0 Normaldata-linkonly
\N1 Directdata-linkonly
\N2 MNP data link only
\N3 V.42/MNP/Normaldatalink

11
\N4 V.42 data link only
\O Initiate reliable link during a normal link
\Q_ \Q0 Turnoffflowcontrol
\Q1 XON/XOFFsoftwareflowcontrol
\Q2 CTSsignalunidirectionalhardwareflow
control
\Q3 RTS/CTSsignalbi-directionalhardware
flowcontrol
\TnInactivity timer, where n = 0 to 90 minutes.
Default is 0
\U Acceptreliable linkduring anormal link
\V_ \V0 Donotsendextendedresponses
\V1 Sendextendedresponseset1
\V2 Send extended response set 2
\X_ \X0 ProcessXON/XOFFbutdon’tpassthrough
\X1 ProcessXON/XOFFandpassthrough
\Y Switchtoreliable linkfromnormal link
\Z Endthereliableconnectionandswitchto
normaloperation
-J -J0 Disableerrorcontroldetectionphase
-J1 Enable error control detection phase
"H "H0 V.42bisdatacompressiondisabled
"H1 Cansend but notreceive V.42bisdata
compression
"H2 Canreceive but notsend V.42bisdata
compression
"H3 BidirectionalV.42bisdata
compressionenabled
"Onn=6- Set maximumV.42bis data blocksize to n.
250 Default is 16
3.6 Fax Class 1 Commands
+FAA=n Data/Fax auto answer enable. Default is 0
+FAE=n Data/Fax auto answer enable. Default is 0
+FCLASS? Returnscurrentoperatingmode
+FCLASS=n Setsoperatingmode
+FCLASS=? Returns availablesupportedmodes
+FMFR? Identifymodemmanufacturer
+FMDL? Identifyproductmodel
+FPREV? Identifyproductrevision

12
+FRH=<mod> ReceiveHDLCdata
+FRHM=<mod>Receivedata
+FRS=<time> Waitforsilence
+FRTn Faxreceivetestcommand
+FTH=<mod> Transmit HDLC data
+FTM=<mod> Transmitdata
+FTS=<time> Stoptransmissionandpause
+FTTn Faxtransmittestcommand
3.7 Voice Mode Commands
#VBP Generatebeeptone
#VCL=n Voicemodeselection.Defaultis0
#VCSD=n Commandmodesilencedetection.Defaultis0
#VGPS=n Inputpinfunctionselection.Defaultis0
#VGPC=n Inputpincharacterselection.Default is 0
#VIN Readgeneralpurposeinputpins
#VIP=n Initializeparameter.Default is 0
#VLN=n Relay/speakercontrol.Defaultis0
#VOUT=n Write to output pins. Default is 0
#VPH Telephoneemulationmode.
#VPL=n Play level. Default is 127
#VPY Playmode
#VRD Recordmode
#VRL=n Recordinglevel.Defaultis127
#VSL=n Recordingsilencethresholdlevel.Default
is 127
#VSM=n Samplingmode.DefaultisCL1
#VSQT=n Recordmode“q” silencetime.Default is60
#VSR=n Sampling rate. Default is 9600
#VSST=n Recordmode“s” silencetime.Default is 60
Setion Four - S Registers
Your modem has 35 registers, designated S0 through
S30, S37, S90, S108, and S109. Table 4-1 shows the regis-
ters,theirfunctions,andtheirdefaultvalues.Someregisters
can have their values changed by commands. If you use a
command to change a register value, the command remains
ineffectuntilyouturnofforresetyourmodem.Yourmodem
then reverts to the operating characteristics specified in its
non-volatilememory. Refer toSection3forinformation on
how to use the AT commands to manipulate the S registers.

13
Table 4-1 S - Registers
Register Function Range/units Default
S0 Auto-answerRing 0-255/rings 0
S1 Ringcounter 0-255/rings 0
S2 Escapecodecharacter 0-127/ASCII 43
S3 Carriagereturncharacter 0-127/ASCII 13
S4 Linefeedcharacter 0-127/ASCII 10
S5 Backspacecharacter 0-32, 127/ASCII 8
S6 Dialtone waittime 0-255/seconds 2
S7 Remotecarrierwaittime 1-255/seconds 30
S8 Commapausetime 0-255/seconds 2
S9 Carrierdetecttime 0-255/0.1second 6
S10 Carrierlosstime 0-255/0.1second 14
S11 Touch-tonedialingspeed 50-255/0.001second 70
S12 Esc.characterdetecttime 0-255/0.02second 50
S13 Reserved
S14 Echo,response,dialing, Bit-mapped
originate/answer
S15 Reserved
S16 Modemtestoptions Bit-mapped
S17 Reserved
S18 Modemtesttimer 0-255/seconds 0
S19 Reserved
S20 Reserved
S21 DTR, DCD, DSR, and Bit-mapped
LongSpaceDisconnect
S22 Speakerandresponse Bit-mapped
S23 RDL, DTE data rate, Bit-mapped
parity,andguardtone
S24 Reserved
S25 DTRdelay 0-100/seconds 5
S26 RTS/CTSdelayinterval 0-255/0.01second 1
S27 Asyncoperation,CCITT/ Bit-mapped
Bellmode
S28 Reserved
S29 Reserved
S30 Sleepmodetime 0-90/seconds 10
S37 Maximumlinespeed 0-11 0
S90 Disconnecttimer 0-255/seconds 0
S108 Retrainoptions 0-3 2
S109 LineSpeedpermitted 2-62 62
Section Five - Result Codes

14
BASIC RESPONSE CODES
OK 0 CONNECT 1
RING 2 NOCARRIER 3
ERROR 4 CONNECT 1200 5
NODIALTONE 6 BUSY 7
NOANSWER 8 CONNECT 2400 10
CONNECT 4800 11 CONNECT 7200 12
DATA 13 CONNECT 9600 14
FAX 15 CONNECT 12000 16
CONNECT 14400 17 +FCERROR +F4
MODIFIED RESPONSE CODES (\V1)
CONNECT 300/REL 22 CONNECT 1200/REL 24
CONNECT 2400/REL 25 CONNECT 4800/REL 26
CONNECT 7200/REL 27 CONNECT 9600/REL 28
CONNECT 12000/REL 29 CONNECT 14400/REL 30
EXTENDED RESPONSE CODES (\V2)
CONNECT300/REL-MNP 32
CONNECT1200/REL-MNP 34
CONNECT2400/REL-MNP 35
CONNECT4800/REL-MNP 36
CONNECT7200/REL-MNP 37
CONNECT9600/REL-MNP 38
CONNECT12000/REL-MNP 39
CONNECT14400/REL-MNP 40
CONNECT 300/REL-MNP 5 42
CONNECT 1200/REL-MNP 5 44
CONNECT 2400/REL-MNP 5 45
CONNECT 4800/REL-MNP 5 46
CONNECT 7200/REL-MNP 5 47
CONNECT 9600/REL-MNP 5 48
CONNECT 12000/REL-MNP 5 49
CONNECT 14400/REL-MNP 5 50
CONNECT1200/REL-LAPM 54
CONNECT2400/REL-LAPM 55
CONNECT4800/REL-LAPM 56
CONNECT7200/REL-LAPM 57
CONNECT9600/REL-LAPM 58
CONNECT12000/REL-LAPM 59
CONNECT14400/REL-LAPM 60
CONNECT1200/REL-LAPMV.42BIS 64
CONNECT2400/REL-LAPMV.42BIS 65
CONNECT4800/REL-LAPMV.42BIS 66
CONNECT7200/REL-LAPMV.42BIS 67

15
CONNECT9600/REL-LAPMV.42BIS 68
CONNECT12000/REL-LAPMV.42BIS 69
CONNECT14400/REL-LAPMV.42BIS 70
Section Six - Troubleshooting
Thissectiondescribes some of the common problems
youmay encounter while using yourmodem. If you can not
resolveyourdifficultyafterreadingthischapter,contactyour
dealer or vendor for assistance.
Modem does not respond to commands.
1. Make sure the modem is not configured with a conflicting
COM port and IRQ setting (see Section 2.4). Your modem
cannotbeconfiguredasCOM1(default)ifanotherdevicein
your system is also configured as COM1. Similarly, IRQ
settingsmaynotoverlap.
2. Make sure the communication software is configured to
“talk”tothemodemonthecorrectCOMportandIRQsetting
(same COM port and IRQ setting as the modem). Your
communication software must know which address your
modem is using in the system in order to pass data to it.
Similarly,IRQsettingsmustbe setcorrectlytoreceivedata
fromthemodem.
3. Make sure that your modem is initialized correctly. Your
modem may have been initialized to not display responses.
You may factory-reset the modem by issuing AT&F and
press ENTER.The factory default allows the modem to
displayresponsesafteracommandhasbeenexecuted.
4. Make sure the baud rate setting in your software is set to
57600,38400,19200,14400,9600,2400,1200,or300bps.
An incorrect baud rate prevents the modem from operating
properly.
Modem does not dial.
1. Makesurethemodemisconnectedtoaworkingphoneline.
Replacethemodemwithaworkingphonetoensurethatthe
phonelineisworking.
2. Make sure the phone line is connected to the jack marked
“LINE.” Incorrect connection prevents the modem from
operatingproperly.RefertoSection2.2formodemconnec-
tioninstructions.
Modem dials but does not connect.
1. Make sure the IRQ setting is identical on both the modem
ANDthesoftware.Modemandsoftwaremustbeconfigured

16
identically.
2. Make sure the phone line is working properly. Replace the
modemwitharegularphoneanddialthenumber.Iftheline
sounds noisy, you may have difficulty connecting to the
remotedevice.
Modem makes a connection but no data appears
on your screen.
1. Theremotesystemmaybewaitingtoreceiveyourdatabefore
itbegins.Try pressingtheENTERkey afewtimes.
2. Make sure the correct data format (data bits, stop bits, and
parity bits) and flow control (RTS/CTS) method are being
used.
3. Makesurethecorrectterminalemulationmodeisbeingused
(seecommunicationsoftwaremanual).
4. MakesurethemodemisnotsharinganIRQorCOMportwith
anotherdevice(seeSection2.4).
High pitch tone is heard whenever you answer the
phone.
1. MakesureAuto-Answeristurnedoff.Yourmodemisfactory
configuredtoNOTauto-answer.IssueAT&Ftofactoryreset
yourmodem.
Modem experiences errors while communicating
with a remote modem.
1. MakesuretheDTEspeedisthesameasthemodemconnec-
tionspeedwheninDirectMode(\N1commandineffect).
2. Makesuretheremotesystemandyourmodemusethesame
communication parameters (i.e., baud rate, data bit length,
parity,andstopbit).
3. Make sure RTS/CTS hardware flow control is enabled and
XON/XOFFsoftwareflowcontrolisdisabledinthecommu-
nicationsoftware.
4. Make sure the data speed is not faster than your computer's
capability.MostIBMcompatiblesarecapableof19,200bps
underDOSandWindows.Operatingathigherspeedsunder
Windowsrequires afaster CPU (386/486 or better).
Modem experiences bursts of errors or suddenly
disconnects while communicating with a remote
modem.
1. Make sure Call Waiting is turned off.
2. Makesurethephonelinedoesnotexhibitexcessnoise.
Modem exhibits poor voice record or playback.

17
1. Make sure the correct modem type is selected in the Voice/
FAXsoftware.Use“CirrusLogic”orsimilarselection.Do
notselect“RockwellorRockwellICS”configuration.
Section Seven - Specifications
CCITT/BellStd. V.42bis, V.42, V.32bis, V.32, V.29,
V.27ter, V.22bis, V.22, V.21, V.17,
Bell212/103
MNPprotocols: MNP 5, 4, 3, 2
HostInterface: 8 bit PC bus
COMports: 1, 2, 3, 4
IRQlines: 2, 3, 4, 5
FAXGroup: GroupIIISend/ReceiveStandard
FAXCommandset: EIA/TIA-578ServiceClass1
VoiceCommandset: CirrusLogic
EscapeDetection: TIESEscapeSequence
Transmitlevel: -12 dBm +/- 1 dB
ReceiverSensitivity: -40 dBm
UART: 16550compatible
Dataformat: 300-57600bps (8N1, 7E1,7E2,7O1,7O2)
Power: 0.75 W
Temperature: 0 to 55 degrees C (Operating); -20 to 80
degreesC(Non-operating)
Section Eight - Support and Service
In the unlikely event you experience difficulty in the use of this
product,wesuggestyou:(1)consulttheTroubleshootingsection
ofthisguideand(2)consultwithyourdealer.Toobtainservicefor
thisproduct,followtheReturnMerchandiseAuthorizationProce-
dure as outlined in the Warranty card.
Section Nine - FCC , DOC & Other Notices
9.1 FCC Compliance
ThisequipmentcomplieswithPart68oftheFCCRules.Onthis
equipmentisalabelthatcontains,amongotherinformation,the
FCCregistrationnumberandRingerEquivalenceNumber(REN)
forthisequipment.Youmust,uponrequest,providethisinforma-
tiontoyourtelephonecompany.
If your telephone equipment causes harm to the telephone net-
work, the Telephone Company may discontinue your service
temporarily. If possible, they will notify in advance. But, if
advance notice isn’t practical, you will be notified as soon as

18
possible. You will be informed of your right to file a complaint
withtheFCC.
Your telephone company may make changes in its facilities,
equipment, operations, or procedures that could affect proper
operation of your equipment. If they do, you will be notified in
advance to give you an opportunity to maintain uninterrupted
telephoneservice.
TheFCCprohibitsthisequipmenttobeconnectedtopartylinesor
coin-telephoneservice.
In the event that this equipment should fail to operate properly,
disconnecttheequipmentfromthephonelinetodetermineifitis
causingtheproblem.Iftheproblemiswiththeequipment,discon-
tinueuse and contactyour dealerorvendor.
TheFCCalsorequiresthe transmitter ofaFAXtransmissionbe
properlyidentified(perFCCRulesPart68,Sec.68.381(c)(3)).
9.2 FCC Class B Statement
Thisequipmenthasbeentestedandfoundtocomplywiththelimits
foraClassBdigitaldevice,pursuanttoPart15oftheFCCRules.
Theselimitsaredesignedtoprovidereasonableprotectionagainst
harmful interference in a residential installation. This equipment
generates,usesandcanradiateradiofrequencyenergy,andifnot
installedandused in accordancewiththe instructions, maycause
harmfulinterferencetoradiocommunications.However,thereisno
guaranteethatinterferencewillnotoccurinaparticularinstallation.
If this equipment does cause harmful interference to radio or
televisionreception,whichcanbedeterminedbyturningtheequip-
ment off and on, the user is encouraged to try to correct the
interferencebyoneormoreofthefollowingmeasures:
• Reorientorrelocatethereceivingantenna
• Increasetheseparationbetweentheequipmentandthereceiver
• Connecttheequipmentintoanoutletonacircuitdifferentfrom
thattowhichthereceiverisconnected
• Consultthedealeroranexperiencedradio/TVtechnicianfor
help
Notice: 1)Shieldedcables,ifany,mustbeusedinordertocomply
with the emission limits. 2) Any change or modification not
expresslyapprovedbytheGranteeoftheequipmentauthorization
couldvoidtheuser’sauthority tooperatetheequipment.
9.3 DOC Compliance Information
NOTICE:TheCanadianDepartmentofCommunicationslabel
identifies certified equipment. This certification means that the

19
equipmentmeetscertaintelecommunicationsnetworkprotective,
operational and safety requirements. The Department does not
guaranteetheequipmentwilloperatetotheuser’ssatisfaction.
Beforeinstallingthisequipment,usersensurethatitispermissible
tobeconnected tothefacilities of thelocaltelecommunications
company.Theequipmentmustalsobeinstalledusinganaccept-
able method of connection. The customer should be aware that
compliancewiththeaboveconditionsmaynotpreventdegrada-
tionofserviceinsomesituations.
Repairstocertifiedequipmentshould bemadebyanauthorized
Canadian maintenance facility designated by the supplier. Any
repairs or alterations made by the user to this equipment, or
equipmentmalfunctions,maygivethetelecommunicationscom-
panycausetorequesttheusertodisconnecttheequipment.
Users should ensure for their own protection that the electrical
ground connections of the power utility, telephone lines and
internal metallic water pipe system, if present, are connected
together.This precaution maybe particularly importantin rural
areas.
Caution: Users should not attempt to make such connections
themselves,butshouldcontacttheappropriateelectricinspection
authority,orelectrician,asappropriate.
NOTICE: The Load Number (LN) assigned to each terminal
devicedenotesthepercentageofthetotalloadtobeconnectedto
atelephoneloopwhichisusedbythedevice,topreventoverload-
ing.Theterminationonaloopmayconsistofanycombinationof
devicessubjectonlytotherequirement that thesumoftheLoad
Numbersofallthedevicesdoesnotexceed100.
9.4 Disclaimer, Copyright, And Other Notices
Theinformationcontainedinthismanualhasbeenvalidatedatthe
timeofthismanual'sproduction.Themanufacturerreservesthe
right to make any changes and improvements in the product
describedin this manual atany time and withoutnotice. Conse-
quently the manufacturer assumes no liability for damages in-
curreddirectlyorindirectlyfromerrors,omissionsordiscrepan-
ciesbetweentheproductandthemanual.
All registered trademarks are the property of their respective
owners.
Copyright © 1995 All rights reserved. No reproduction of this
documentinanyformispermittedwithoutpriorwrittenauthori-
zationfromthemanufacturer.
FirstEdition GZ/DR -Version 1.0