IBM 6824, 2289 manual Extended AT commands

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Command		Function
	I1	Factory ROM checksum test

	I2	Internal memory test

	I3	Firmware ID

	I4	Reserved ID

L_	L0	Low speaker volume

	L1	Low speaker volume
	L2	Medium speaker volume

	L3	High speaker volume

M_	M0	Internal speaker off

	M1	Internal speaker on until carrier detected
	M2	Internal speaker always on

	M3	Internal speaker on until carrier detected and off while dialing

N_		Included for compatibility only, provides no effect

O_	O0	Return to Data Mode

	O1	Return to Data Mode and initiate an equalizer retrain

P		Set Pulse dial as default
Q_	Q0	Modem sends responses

	Q1	Modem does not send responses

Sr?		Read and display value in register r.

Sr=n		Set register r to value n (n = 0-255).

T		Set Tone Dial as default

V_	V0	Numeric responses

	V1	Word responses

W_	W0	Report DTE speed only

	W1	Report line speed, error correction protocol, and DTE speed.

	W2	Report DCE speed only

X_	X0	Hayes Smartmodem 300 compatible responses/blind dialing.

	X1	Same as X0 plus all CONNECT responses/blind dialing

	X2	Same as X1 plus dial tone detection

	X3	Same as X1 plus busy detection/blind dialing

	X4	All responses and dial tone and busy signal detection

Z_	Z0	Reset and retrieve active profile 0

	Z1	Reset and retrieve active profile 1

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

32User Guide

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Contents User Guide Type 2289 Page User Guide Type 2289 Page Appendix B. Manual modem Iv User Guide Safety Information To connect To disconnectConnexion Déconnexion Lithium battery noticeModem safety information Laser compliance statement Consignes de sécurité relatives au modemViii User Guide Overview Information resourcesUser Guide Installing options FeaturesAudio subsystem Security features Specifications Handling static-sensitive devices Available optionsTools required 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 driversRemoving the cover Locating components Identifying parts on the system boardInstalling memory What to do next Installing adapters Installing internal drives Drive specifications Installing a drive Connecting the first IDE CD-ROM drive or DVD-ROM drive Connecting an additional IDE CD-ROM drive or DVD-ROM drive Physical securityChanging the battery Replacing the cover and connecting the cables Erasing a lost or forgotten password clearing Cmos Installing options User Guide Using the IBM Setup Utility program Starting the IBM Setup Utility programViewing and changing settings Exiting from the IBM Setup Utility programUser password Administrator passwordSetting, changing, and deleting a password Using Security Profile by DeviceChanging the startup device sequence Selecting a startup deviceSelecting a temporary startup device User Guide Updating flashing Bios from a diskette Updating flashing Bios from your operating systemAppendix A. Updating System Programs System programsRecovering from a POST/BIOS update failure Appendix B. Manual modem commands Basic AT commandsExtended AT commands Guard tone disabled Enable RTS/CTS hardware flow controlUS setting for off-hook-to-on-hook ratio Force DSR Signal High onFax Class 2 commands MNP/V.42/V.42bis/V.44 commandsFax Class 1 commands Voice commands User Guide Appendix C. System address maps System memory mapAddress map Address range Address range hex Size Description DecimalLPT3 DMA I/O address map Address hex Description Bits Byte pointerAddress hex Description Bits Byte pointer System resource DMA channel Data width System resourceUser Guide Appendix E. Notices Television output noticeTrademarks IBMIndex DVDPage Page Part Number 49P1040