Appendix B AT Command Set, ATXn | Actiontec electronic V.90 ISA

Appendix B: AT Command Set

AT Commands

AT commands are issued to the modem to control the modem’s operation and soft- ware configuration. AT commands are commonly entered from a terminal program such as HyperTerminal, and can only be entered while the modem is in command mode. To enter an AT command, type:

ATXn

where X is the AT command, and n is the specific value for that command. Press

ENTER.

Commands are acknowledged with either text or numeric value response known as a result code. In the case of multiple AT commands on the same command line, the commands are executed in the order they are received. Should execution of a com- mand result in an error, or a character not be recognized as a valid command, execu- tion is terminated, the remainder of the command line is ignored, and the ERROR result code is issued. If all commands execute correctly, only the result code associ- ated with the last command shall be issued, even though all have been executed.

In the following listing all commands and command values accepted by the modem are shown. Any entries other than those shown cause the ERROR result code.

+++Escape sequence

The escape sequence allows the modem to exit data mode and enter on-line com- mand mode. While in on-line command mode, you may communicate directly to your modem using AT commands. Once you are finished, you may return to data mode using the ATO command. A pause, the length of which is set by the Escape Guard Time S-Register (S12--See the “S-Registers Reference” section of this manual for details), must be used after an escape sequence is issued. This pause prevents the modem from interpreting the escape sequence as data. The value of the escape se- quence character may be changed using Register S2.

A/	Repeat Last Command

This command repeats the last command string entered. Do not precede this com- mand with an AT prefix or conclude it by pressing Enter.

A	Answer Command

This command instructs the modem to go off-hook and answer an incoming call.

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Actiontec electronic V.90 ISA Appendix B AT Command Set, ATXn, +++ Escape sequence, Repeat Last Command, Answer Command

Contents

ISA Plug n Play Voice/Fax Modem Table of Contents Introduction Contacting Actiontec Customer Support For Windows 95/98 Installation Before You Begin For Windows NT 4.0 Installation Installing The Modem Hardware Installation Installing The Modem Connecting Devices to the Modem Connecting Devices Configuring Windows Page Configuring Windows 95 OSR2 FinishPage Page Configuring Windows Page Page Page Page Configuring Windows NT Page Page Page Page Init String Installing Communications SoftwareFax TIA/EIA-578 for Class 1 Fax Voice AT&F&C1&D2W2 Troubleshooting Windows 95/98 More Info Panel Common Problems No Dialtone Error Communications Software Does Not Work Appendix a Non Plug-N-Play Installations COM Ports and Interrupts Jumper Settings Jumpers Set To Plug-N-Play default setting Hardware and Driver Installation Installing In DOS and WindowsRemove Page Answer Command Appendix B AT Command SetRepeat Last Command ATXn Result Codes Carrier Control DnDial Last number dialed Online Data Character Echo Command Echo CommandHook Control This command sets speaker volume to low, medium, or high Monitor Speaker VolumeRequest ID Information This command turns the speaker on or off Modulation Handshake Select Pulse Dialing Return On-line to Data ModeResult Code Control DCE Response Format Result Code Option Extended Result Codes Dial Tone Detect Long Space Disconnect Long space disconnect is always disabledBusy Tone Detect Recall Stored Profile This modem always auto retrains Auto RetrainData Carrier Detect DCD Control Load Factory Settings DTR Control Auxiliary Relay option Local Flow Control Selection This Command is effective only for use in Japan Asynchronous Communications ModePulse Dial Make-to-Break Ratio Selection This command selects DSR action Data Set Ready DSR Option This command is used to display the active profiles Below is an example of a possible output SSE \An Zn=x\Bn Adjust Bits/s Rate Control Modem Port Flow Control \Kn \Nn Error Control Mode Selection = 0, 1, 2, 3, 4, 5 \Vn Protocol Result Code \Tn Inactivity Timer\Xn XON/XOFF Pass Through Data Calling Tone Enable/Disable Data CompressionView Numbers in Blacklist Write to/Read from DSP Register AT Commands for Testing and DebuggingSelf-Test Commands Line-to-Line Loopback ATI11 Registers Reference Type Range −127, Ascii decimal Default Carriage return Units Range 0−255 Default UnitsringsRange 0−255 Default UnitsASCII Range −127, Ascii decimal Default Line feed Units Connection Completion Time-Out Range −32 Default Backspace UnitsRange Default Unitsseconds Comma Dial Modifier Time S12 Escape Guard Time S10S11 Dtmf Dialing Speed S14 General Bit Mapped Options Status S21 S24 Timer to Control Sleep ModeS22 S32 S28 Modulation Enable/DisableS30 Inactivity Timer S33 S36 S37 Dial Line Rate defaultS38 56K Dial Line Rate default Connection S43 Auto Mode default 1, range S42 Auto Rate default 1, rangeS48 Lapm Error Control and Feature Negotiation default S91 S89 Timer to Control Sleep ModeS90 S92 S109K56flex and V.90 Selection default No Carrier Result Code Appendix B Communications Regulations Declaration of Conformity Canadian Department of Communications Cdoc