Chapter 5 - Command Mode

COMMAND +++AT

MODE

 

 

 

 

 

 

 

 

HANG

 

 

 

 

Dial (D or A) command,

UP

 

 

 

 

or incoming phone call

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WAIT FOR

 

 

 

 

 

 

CARRIER

 

 

 

No carrier

 

 

 

 

 

 

 

 

Carrier detected

 

 

detected

 

 

 

 

 

 

 

 

Carrier lost

ON-LINE

 

 

AT0 Command

 

 

MODE

 

 

 

 

 

 

 

 

 

 

Figure 5-1. Functional Modes

5.2Summary 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

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

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Multi-Tech Systems MT2834BL Series, MT2834BA Series manual Summary of AT Commands, Functional Modes