2 summary of at commands, At commands, How to commands – Multi-Tech Systems MT2834BL User Manual

Page 29: Summary of at commands

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29

Chapter 5 - Command Mode

Multi-Tech Systems, Inc. MT2834BA/BL Series User Guide

Dial (D or A) command,

or incoming phone call

Carrier detected

HANG

UP

ON-LINE

MODE

WAIT FOR

CARRIER

COMMAND

MODE

AT0 Command

+++AT

No carrier

detected

Carrier lost

Figure 5-1. Functional Modes

5.2

Summary of AT Commands

A wide variety of autodial operations and modem options can be controlled when the modem is in
Command Mode. Remember, nearly all commands begin with AT.

These commands are organized into several functional groups. An alphabetical summary of
commands is provided in Appendix D.

HOW TO

COMMANDS

DIAL

D

Dial

A: or : Continuous Redial
$D

DTR Dialing

$VD

Voice/Data Dialing

N

Dial a Stored Number

MODIFY DIALING

P/T

Pulse/Tone Dialing

PROCEDURES

&P

Set Pulse Dial Ratios

,

Automatic Pauses in dialing

Y

Long Space Disconnect

W

Wait for New Dial Tone

;

Return to Command Mode After Dial
Command

R

Reverse Mode of Operation

!

Flash On Hook

$

AT&T "Calling Card" Tones

@

Quiet Answer

MEMORIZE PHONE
NUMBERS

D...N

Store Phone Numbers

NN

Number Linking

L

List Numbers Stored in Memory

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