3 Com U.S. Robotics 3Com User’s Manual & Reference - Page 12

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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

Bn (0,1)

D (0-9,#,*,,,;,!,@,L,",R,S,W,$)

En (0,1)

Fn (0,1)

Hn (0,1)

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

Ln (0,1,2,3)

Mn (0,1,2,3)

On (0,1)

P/T

Qn (0,1,2,3)

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

Sr?

Vn (0,1)

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

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

Technical Reference

Answer

Repeat Last command forever

ITU-T/US answer sequence

Dial

Echo

Duplex On/Off setting

Offhook On/Off control

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

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

Speaker control

On line

Pulse/Tone dialing

Quiet

Set S-Register, n=integer

Query contents of S register

S register help screen

Verbal/Numeric return result codes

Result code options.

NVRAM template for power up.