Samsung N640CN2021/EHQ, N640CP4007/SEF, N640CP4024/EHQ, N640CP2006/SEF manual Basic AT Commands, Ato

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The result value can be displayed during communication. Generally, the result will be OK. According to the ATV command, the result can be displayed as Words or numeral letters. (ATV0 : Display as numeral letters, ATV1: Display as English words)

Basic AT Commands

A/	Repeats the previous command in the buffer
ATA	Responds manually to incoming RING signals

+++Switches from on-line mode to command mode

ATO	Switches from command mode to on-line mode
ATEn	Echo control
E0	Disables echoing of the commands to the screen
E1	Enables echoing of the commands to the screen
ATDT phone number		Touch tone dial
ATDP phone number		Pulse dial
ATHn	Hook control
H0	On-Hook (same as hang-up)
H1	Off-Hook (same as hold-on)
ATLn	Modem speaker loudness control
L0~1	Low volume
L2	Medium volume
L3	High volume
ATMn	Modem speaker control
M0	Disables modem speaker
M1	Enables only when in connection procedure
M2	Enables always
M3	Enables until carrier has been detected after connection
ATS0=n	Sets S0 register value (n range : 0~255). Sets the number of incoming
	ring signals before answering. Modem responds after ringing as many

Using the Modem 47

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Contents Special Features of the User’s Manual Using Your DocumentationUsing the Software User Documentation LCD Introducing Your ComputerBack View of Computer Attaching the AC Adapter Using Your Computer for the First TimeTurning On the Computer Turning On the Computer’s PowerTurning Off Your Computer Adjusting the LCD DisplayAPMAdvanced Power Management mode Understanding PostRestarting Your Computer ACPIAdvanced Configuration and Power Interface modeTips for Using Your Computer Traveling with Your Computer Storing the Computer for Long Periods Handling SpillsKeyboard Using the KeyboardNumeric Keypad Using the Embeded Numeric KeypadFn Key Function Combination Using Special Function KeysDescription of Special Function Keys Using the Keyboard Mouse Action How To Using the TouchpadUsing the Touchpad Using the Touchpad System Status Lights Reading the System Status LightsReading the System Status Lights Peripheral Connectors Connecting Peripheral DevicesIconConnector Connecting Peripheral DevicesConnecting Peripheral Devices To remove a device from the Flex-Bay Using the Flex-BaySetting the IDE type Drive SwitchRemoving a Device from the Flex-Bay To install a device in the Flex-BayMagnetic fields can destroy the information on a disk Using the Floppy DriveUsing the Floppy Drive Using the CD-ROM Drive Using the CD-ROM DriveUsing the CD-ROM Drive Installing the Power DVD Player MPEG-2 Software Using the DVD-ROM DriveRemoving the Hard Drive Using the Hard DriveRemoving the Hard Drive Installing a Hard DriveCharging the Battery Using the BatteryRemoving the Battery Safely Using the BatteryRemoving the Battery Pack Installing the BatteryUsing the Battery Gauge Monitoring the Battery ChargeSet options under Battery Status and Alarm Settings Using PowerProfiler to Monitor the BatteryCondition Action to Take Battery WarningsBattery Warnings Sens Modem Naming Convention Using the ModemIf you use a Windows Communication Program Precautions before useIf you use a simple terminal program Description of 56K SpecificationInstall the Modem Driver Installing the Modem Driver in Windows MeDeleting the Modem Driver Confirming Installation of the Modem DriverSelecting a Country Installing the Modem Driver in Windows 95/98 Check if Country is selected correctly Command mode Modem CommandsWhat are AT commands? Before Using AT CommandsDisplay the result value Using AT commandsUsing Command Mode during Communications ATO Basic AT CommandsATS0? Menu Function Using System SetupStarting System Setup System Setup MenusNavigation Alternate Function Key System Setup Navigation KeysMain Menu Using System Setup Using System Setup Advanced Menu Security Menu Power Menu Using System Setup Exit Menu Boot MenuUsing System Setup Creating a Password Using System SecuritySystem Passwords Deleting a Password Locking the Keyboard Requiring a Boot PasswordLocking the Hard Drive Boot Sector Maximum Power Saving Mode Using Power Management OptionsRest Mode Standby ModeRest Mode Precautions Using PowerProfiler To create Fdisk Creating a Save to Disk PartitionTo create Phdisk Insert the System Recovery CD-ROM To reinstall your operating systemTo reinstall your original applications and drivers Resolution and Color Depth Video Features and ConfigurationVideo Driver Capabilities Configuring Display FeaturesSelecting a Monitor Type Changing Color Depth and Resolution Changing the Video Driver Using the TV-Out PortClick OK and follow the prompts that appear on the screen Setting Dual View mode Using Dual View modeLimits and cautions of using Dual View mode Three Displays Using several display devicesPrimary Limits Secondary Two DisplaysLimits on Video Driver while using Dual View mode Maintaining PC Cards Working with PC CardsWindows 98/ Me Using PC CardsWindows NT Working with PC Cards AC Adapter Using OptionsBattery Pack Memory Modules Auto AdapterInstalling a Memory Module Before You Install MemoryRemoving the Memory Module Compartment Door Hard Drives Installing a Memory ModuleCD-ROM Drive Setting the switch on 2nd HDDSuperdisk LS-120 Drive DVD-ROM Drive ModuleZIP Drive Inserting a 120MB LS-120 diskette into the LS-120 drive Docking OptionsIRQs About Drivers and System ResourcesDrivers IRQsService Pack 4 for Windows NT About Drivers and System Resources Computer is not behaving as expected TroubleshootingOperating Problem Computer does nothing when you turn it onPC Card does not work correctly Battery power seems to run out faster than expectedWhen using a PBX phone system I cant dial on my modem Infrared ProblemsModem Problems Troubleshooting Environment SpecificationsHardware Specifications DimensionExternal AC Adapter Lithium-Ion Smart BatteryNi-MH Dumb Battery CD-ROM AbbreviationsPcmcia Voltage collector current Universal serial busVolt Voltage alternating currentAC adapter BootBoot disk GlossaryCmos memory DMA direct memory accessCache memory CardBusIRQ interrupt request line Floppy diskHard drive AddressOperating system RAM random access memoryMBmegabyte MegabitSector ResolutionRefresh rate ROM read-only memoryDiskette a Recording the Computer Hardware ConfigurationDisabled Other Parallel port Enabled Mode Output onlyDisabled 42F8, IRQ 2E8, IRQ 3 Disabled Disabled Bi-directionalSecurity Menu Page Important Safety Instruction Iii Federal Communications Commission FCC Federal Communications Commission FCC Part 68 Statement Canadian Radio Interference Regulations CTR21 StatementClass 1 Laser Productlaserschutzklasse 1 Produkt Country Accredited Applicable Agency Power Cord RequirementCountry-Specific Power cord Set Requirements General RequirementsSEV

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