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SIM900 AT Command Manual

SIM900_AT Command Manual_V1.03 16 12/24/2010

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>

ATD L 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

ATS 0 SET NUMBER OF RINGS BEFORE AUTOMATICALLY

ANSWERING THE CALL

ATS 3 SET COMMAND LINE TERMINATION CHARACTER

ATS 4 SET RESPONSE FORMATTING CHARACTER

ATS 5 SET COMMAND LINE EDITING CHARACTER

ATS 6

PAUSE BEFORE BLIND DIALLING

ATS 7 SET NUMBER OF SECONDS TO WAIT FOR CONNECTION

COMPLETION

ATS 8 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

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