USRobotics 3Com manual Typing Commands, AT Command Set

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Technical Reference

Typing Commands

In terminal mode, 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 because 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. This does not include the AT prefix, carriage returns, or spaces.

All defaults are based on the &F1 Hardware Flow Control template loaded in NVRAM when the modem is shipped.

AT Command Set

A

Answer

>

Repeat Last command forever

Bn (0,1)

ITU-T/US answer sequence

D (0-9,#,*,,,;,!,@,L,”,R,S,W,$)

Dial

 

En (0,1)

Echo

Fn (0,1)

Duplex On/Off setting

Hn (0,1)

Offhook On/Off control

In (0,1,2,3,4,5,6,7,8,10)

Inquiry

 

I0

Modem type

 

I1

DSP checksum

 

I2

Company & Product ID

 

I3

Product Revision

 

I4

Current Settings

 

I5

Profile Settings

 

I6

Connection Diagnostics

 

I7

Configuration Profile

 

I8

Blacklisting International only

 

I10 Plug and Play information

Ln (0,1,2,3)

Speaker volume. Note: assumes default = 2 (medium)

Mn (0,1,2,3)

Speaker control

On (0,1)

On line

P/T

Pulse/Tone dialing

Qn (0,1,2,3)

Quiet

Sr=n (0,1,...)

Set S-Register, n=integer

Sr?

Query contents of S register

S$

S register help screen

Vn (0,1)

Verbal/Numeric return result codes

Xn (0,1,2,3,4,5,6,7)

Result code options.

Yn (0,1,2,3,4)

NVRAM template for power up.

 

 

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Contents 56K Modem Product Disclaimer DOS BOX SupportTable of Contents Page Product Features Embedded Control Fax Modulation Schemes 34+ Link RatesVoice Product Features SpeakerphoneInstalling the Modem Installing Drivers for Windows 98 Second Edition Removing the Modem from Windows 98 Second EditionInstalling Drivers for Windows Millennium Edition ME Removing the Modem from Windows Millennium Edition MEInstalling Drivers for Removing the Modem fromInstalling Drivers for Windows Removing the Modem from WindowsTyping Commands AT Command SetExtended AT Command Set Modem is always in &B1 modeSpeakerphone/TAD Commands Miscellaneous CommandsRegisters Page Regulatory Information Manufacturer’s Declaration of ConformityRadio and Television Interference CE Compliance Electromagnetic Compatibility