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AT Commands

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AT Commands Command +++ A/ AT A B0 B1 Cl D E0 El HO H1 I0 I1 I2 L3 MO Ml M2 M3 O0 O1 Q0 Q1 Sr Sr? Sr=n V0 V1 X0 Xl x2 Description Escape code Repeat last command string Attention Answer immediate (incoming call) CCITT V.22 protocol at 1200 bps Bell 103/212A protocol at 1200 bps Carrier control option Dial; originates a call Echo off (command mode) Echo on (command mode) On hook; hang up immediately Off hook; ready to dial Returns modem's product ID code Returns modem's ROM checksum Tests modem's internal memory Speaker volume high Speaker always off Speaker on until carrier is detected Speaker always on Speaker on after last digit dialed; off when carrier is detected Return on-line Return on-line and initiate equalizer retrain (2400 bps) Result codes on Result codes off Sets pointer to register r Reads value stored in r Sets register r to n Returns result codes as numbers Returns result codes as words Enable basic result codes (O-4) Enable extended result codes (O-5, 10) Enable extended result codes (O-6, 10) B - 2 Fax/Modem Command Set

Section	Page
FRONT MATTER	1
TABLE OF CONTENTS	8
INTRODUCTION	12
Computer Features	13
Optional Equipment	14
Power-saving Features	15
What This Manual Covers	16
Conventions Used in This Manual	17
Where to Get Help	17
CompuServe On-line Support	18
CHAP 1-SETTING UP THE COMPUTER	20
Opening the Screen	20
Identifying the System Components	21
Front View	21
Rear Panel and Left Side	22
Using the AC Adapters	22
Connecting the Lightweight AC Adapter	23
Connecting the International AC Adapter	23
Turning the Computer On and Off	25
Reading the Indicator Lights	27
Making Backup Copies of Your Files	28
Running the Setup Program	28
When to Run Setup	29
Starting the Program	29
Changing the Settings	29
Setting, Deleting, and Changing a Password	32
Exiting Setup	35
CHAP 2-USING YOUR COMPUTER	36
Caring for the Computer	37
Protecting the Hard Disk	37
Using Energy Wisely	38
Using the Keyboard	39
Using the Fn Key Functions	39
Using the Embedded Numeric Keypad	40
Using the Trackpad	41
Resetting the Computer	42
Changing the CPU Speed	43
Adjusting the LCD Screen	43
Using Pass word Security	43
Entering a System Password	44
Entering a Setup Password	45
Using Diskettes	45
Using Video Drivers and Utilities	47
Configuring PC Cards	48
Using CardSoft	49
Using Card View	54
Using Fax/Modem PC Cards	55
Using PC Cards with Instant On	55
Installing Additional PC Card Drivers and Utilities	56
CHAP 3-POWERING THE COMPUTER	58
Using the AC Adapter	58
Using the Battery	59
Low Battery Protection	60
Replacing the Battery	60
Recharging the Battery	61
Using the Power Management Features	63
Automatic Features	64
Manual Features	65
Using Instant On and Saving to Disk	66
Using the APM Interface	67
CHAP 4-INSTALLING OPTIONAL DEVICES	70
Connecting External Components	70
Using an External Monitor	72
Using the Serial Port	72
Using an External Keyboard or Mouse	73
Installing a PC Card	73
Removing and Replacing the Hard Disk	75
Installing Internal Components	81
Removing the Keyboard	82
Replacing the Keyboard	84
Installing a Memory Module	85
Upgrading the Microprocessor	87
Replacing the Processor	88
Setting the Processor Speed, CPU Type, and Voltage Switches	91
Installing the Fax/Modem	93
Connecting a Phone Line	95
CHAP 5-TROUBLESHOOTING	96
ldentifying Your System	97
Error Messages	99
The Computer Won't Start	100
Battery Problems	100
AC Adapter Problems	102
The LCD Screen Is Blank	102
The External Monitor Screen Is Blank	103
The Computer Locks Up	104
Password Problems	105
Trackpad Problems	105
External Pointing Device Problems	106
Diskette Problems	107
Diskette Drive Problems	108
Hard Disk Problems	108
Software Problems	109
Printer Problems	110
Memory Module Problems	110
Fax/Modem Problems	111
PC Card Problems	111
APPENDIX A-SPECIFICATIONS	114
CPU and Memory	114
Controllers	115
Interfaces	116
Keyboard	116
Trackpad	116
Fax/Modem	117
Volume Control	117
Mass Storage	117
LCD Screen	117
Setup Program	117
Software	118
Power Sources	118
Environmental Requirements	119
Physical Dimensions	119
Optional Equipment	120
APPENDIX B-FAX/MODEM COMMAND SET	122
AT Commands	123
Dial Modifiers	125
AT S Registers	125
Fax Commands	127
Result Codes	127
APPENDIX C-USING YOUR AUDIO CARD	138