3Com 1.024.1644-00 manual Technical Reference

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Technical Reference

Typing Commands

·Type commands in either upper or lower case, not a combination. Use the Backspace key to delete errors. (You cannot delete the original AT command since it is stored in the modem buffer.)

·If a command has numeric options and you do not include a number, zero is assumed. For example, if you type ATB, the command ATB0 is assumed.

·Every command except A/, +++, and A> must begin with the AT prefix and be entered by pressing ENTER.

·The maximum command length is 58 characters. The modem does not count the AT prefix, carriage returns, or spaces.

All defaults are based on the &F1¾Hardware Flow Control template loaded in NVRAM when the modem is shipped. Defaults are listed in italics.

	Basic Data Commands
<control key>S	Stop or restart help screens.
<control key>C	or
<control key>K	Stop help screens.

$ Use in conjunction with D, S, or & commands (or just AT) to display a basic command list; online help.

AManual Answer: goes off hook in answer mode. Pressing any key aborts the operations.

A/ Re-executes the last issued command. Used mainly to redial. Does not require the AT prefix or a Carriage Return.

A> Re-executes the last issued command continuously, until the user intervenes or the command is executed. forever. Does not require the AT prefix or a Carriage Return.

52 56K Voice Faxmodem Internal - User’s Guide

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Contents 56K Voice Faxmodem Internal Page Table of Contents Page Table of Contents Page Welcome to 56K*Information Access Product Features Back Channel Link Rates Upload Speeds Flash ROM Upgradable Determining Available Resources Control PanelClick Properties Determining Your Version of WindowsWindows 95 version Plug and Play Installation How to Prepare for Plug and Play InstallationHow to Insert the Modem into the Computer Serial NumberPage Page Page Page Installing Modem Drivers With Windows Versions 950 and 950a Moving Through the New Hardware Found ScreensPage COM Port Click More Info… Installing Modem Drivers With Windows Version 950b Using the Update Device Driver Wizard ScreensPage COM Port Click More Info… Word about COM Ports and IRQs How to Change the Modem’s Settings Page How to Insert the Modem into the Computer Page Page Page Page Restart Now Software Installation WindowsInitialisation String Type of ModemFlow Control Possible Solution Read This FirstTroubleshooting Possible Solution Possible Solution Possible Solution Troubleshooting Possible Solution Support Resources Are You Still Having Problems? Support ResourcesAnalogue loopback Analogue signalsAnswer mode ApplicationGlossary Binary digit bit Glossary Auto dialBaud rate Bit rateCharacters per second CPS Data modeGlossary Character Class 1Digital signals DefaultDetect phase GlossaryFacsimile Glossary Error controlFax mode Flow controlNonvolatile memory Nvram Local echoModem OFF/ON hookParity Originate modeGlossary Online fallback/fall forward ProtocolStart/stop bits Terminal modeSerial transmission Terminal32 bis 22 bis27ter See online fall back/fall forwardYmodem 42 bisXmodem Ymodem GTechnical Reference Dials the specified phone number, includes the following Technical ReferenceITU-T answer sequence En Sets local echoDisplays the following information Ln Controls speaker volume internals onlyTechnical Reference Hn Controls ON/OFF hook Mn Operates speakerNumeric codes Verbal codesTechnical Reference Sets result code displayed, default is 11/RINGINGTechnical Reference An Enables/disables additional result code subsets see Xn Resets modemDisplays a list of ampersand & commands Cn Controls Carrier Detect CD signalSets Guard Tone Fn Loads a read-only non-programmable factory configurationKn Enables/disables data compression Hn Sets Transmit Data TD flow control see also &Rn300 bps Sets pulse rotary dial make/break ratio No restrictions on the minimum speed for Wn Writes current configuration to Nvram templates Yn Sets break handling64 56K Voice Faxmodem Internal User’s Guide Register Default Function RegistersDefault Function Bit Value ResultTechnical Reference Register Default Function S13Timer S27 See the instructions for S13 S34 Bit Fax Commands +FCLASS=n Sets the mode of operation+FRH=n +FTH=nDisplayed As a number Words Description Regulatory CE ComplianceLimited Warranty