Extended AT commands | Lenovo 3000 J Series manual

Extended AT commands

Command		Function

&C_	&C0	Force Carrier Detect Signal High (ON)

	&C1	Turn on CD when remote carrier is present

&D_	&D0	Modem ignores the DTR signal

	&D1	Modem returns to Command Mode after DTR
		toggle

	&D2	Modem hangs up, returns to the Command
		Mode after DTR toggle

	&D3	Resets modem after DTR toggle

&F_	&F	Recall factory default configuration

&G_	&G0	Guard tone disabled

	&G1	Guard tone disabled

	&G2	1800 Hz guard tone

&K_	&K0	Disable flow control

	&K3	Enable RTS/CTS hardware flow control

	&K4	Enable XON/XOFF software flow control

	&K5	Enable transparent XON/XOFF flow control

	&K6	Enable both RTS/CTS and XON/XOFF flow
		control

&M_	&M0	Asynchronous operation

&P_	&P0	US setting for off-hook-to-on-hook ratio

	&P1	UK and Hong Kong off-hook-to-on-hook ratio

	&P2	Same as &P0 setting but at 20 pulses per
		minute

	&P3	Same as &P1 setting but at 20 pulses per
		minute

&R_	&R0	Reserved

	&R1	CTS operates per flow control requirements

&S_	&S0	Force DSR Signal High (ON)

	&S1	DSR off in command mode, on in on-line
		mode

&T_	&T0	Ends test in progress

	&T1	Perform Local Analog Loopback Test

	&T3	Perform Local Digital Loopback Test

	&T4	Grant Remote Digital Loopback Test request
		by remote modem

	&T5	Deny Remote Digital Loopback Test request

	&T6	Perform a Remote Digital Loopback Test

	&T7	Perform a Remote Digital Loopback Test and
		Self-Test

	&T8	Perform Local Analog Loopback Test and
		Self-Test

&V	&V0	Displays Active and Stored Profiles

Appendix A. Manual modem commands 67

Image 85

Lenovo 3000 J Series manual Extended AT commands

Contents

User Guide Lenovo 3000 J Series Page Lenovo 3000 J Series Page Contents Getting information, help Conditions that require immediate action Important safety information Service and upgrades General safety guidelines Static electricity prevention Power cords and power adapters Viii User Guide Extension cords and related devices Voltage-selection switchPlugs and outlets Batteries External devicesHeat and product ventilation Operating environment Lithium battery notice Electrical current safety informationTo connect To disconnect Laser compliance statement Modem safety information Data safety Power supply statementCleaning and maintenance Additional safety information Introduction Xvi User Guide Comfort Arranging your workspaceGlare and lighting Electrical outlets and cable lengths Air circulation Connecting your computer Setting up your computer User Guide Setting up your computer User Guide 1394 User Guide Finishing the software installation Turning on powerCompleting important tasks Updating your operating system Installing other operating systemsUpdating your antivirus software Shutting down the computer Features Installing options Memory Input/output features Available options Tools required SpecificationsHandling static-sensitive devices Installing external options Locating the connectors on the front of your computer Locating the connectors on the rear of your computer Connector Description Obtaining device drivers Removing the cover Identifying parts on the system board Locating components User Guide Installing options What to do next Installing memory Installing adapters Secure the adapter with the screw as shown Drive specifications Installing internal drives User Guide Installing a drive User Guide Installing options Connecting the first CD drive or DVD drive Connecting a serial ATA hard disk drive Installing security features Changing the battery Password protectionPadlock loop Installing options Erasing a lost or forgotten password clearing Cmos Replacing the cover and connecting the cables User Guide Creating and using the Product Recovery disc Recovering software Performing backup and recovery operations Using the Rescue and Recovery workspace Creating and using rescue media To create rescue media, do the following Creating and using a Recovery Repair diskette Recovering or installing device drivers Solving recovery problems Setting a rescue device in the startup sequence User Guide Starting the Setup Utility program Using the Setup UtilityViewing and changing settings Using passwords User Password Password considerationsAdministrator Password Setting, changing, and deleting a password Selecting a startup device Using Security Profile by DeviceSelecting a temporary startup device Exiting from the Setup Utility program Advanced settingsChanging the startup device sequence Updating flashing Bios from a diskette Using system programsUpdating system programs User Guide Basic troubleshooting Troubleshooting and diagnosticsSymptom Action Diagnostic programs PC-Doctor for DOS PC-Doctor for Windows Creating diagnostic diskettes PC-Doctor for Windows PE Cleaning the mouseOptical mouse Non-optical mouse Troubleshooting and diagnostics User Guide Information resources Getting information, help, and serviceOnline Books folder Lenovo Care Warranty and safety Access Help Using the documentation and diagnostic programs Help and serviceCalling for service Purchasing additional services Using other services Basic AT commands Appendix A. Manual modem commands Set Pulse dial as default Low speaker volumeSet Tone Dial as default Internal speaker on until carrier detected Extended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 2 commands Fax Class 1 commands Voice commands Appendix A. Manual modem commands User Guide Appendix B. Notices Trademarks Television output notice Index 14, 22, 23 Page Part Number