Manual

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 27 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
A/
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