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SIM800 Series_AT Command Manual_V1.09

2015-08-03

2 AT Commands According to V.25TER

These AT Commands are designed according to the ITU-T (International Telecommunication

Union, Telecommunication sector) V.25ter document.

2.1 Overview of AT Commands According to V.25TER

Command

Description

Re-issues the last command given

ATA

Answer an incoming call

ATD

Mobile originated call to dial a number

ATD><N>

Originate call to phone number in current memory

ATD><STR>

Originate call to phone number in memory which corresponds to field

<str>

ATDL

Redial last telephone number used

ATE

Set command echo mode

ATH

Disconnect existing connection

ATI

Display product identification information

ATL

Set monitor speaker loudness

ATM

Set monitor speaker mode

+++

Switch from data mode or ppp online mode to command mode

ATO

Switch from command mode to data mode

ATP

Select pulse dialling

ATQ

Set result code presentation mode

ATS0

Set number of rings before automatically answering the call

ATS3

Set command line termination character

ATS4

Set response formatting character

ATS5

Set command line editing character

ATS6

Pause before blind dialling

ATS7

Set number of seconds to wait for connection completion

ATS8

Set number of seconds to wait for comma dial modifier encountered in

dial string of D command

ATS10

Set disconnect delay after indicating the absence of data carrier

ATT

Select tone dialing

ATV

TA response format

ATX

Set connect result code format and monitor call progress

ATZ

Reset default configuration

AT&C

Set DCD function mode

AT&D

Set DTR function mode

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