Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 363 2015-08-03
There are two GPRS Service Codes for
the ATD Command: Value 88 and 99.
Establish a connection by service code
99.
Establish a connection by service code
99 and using CID 1
ATD*99#
ATD*99***1#
CONNECT
CONNECT
Check if the MS is connected to the
GPRS network
Detach from the GPRS network
Check if the MS is connected to the
GPRS network
AT+CGATT?
AT+CGATT=0
AT+CGATT?
+CGATT:1
OK
OK
+CGATT: 0
OK
Check the class of the MS AT +CGC LASS ? +CGCLASS:B
OK
Establish a context using the terminal
equipment: defines CID 1
and sets the PDP type to IP, access
point name and IP address aren’t set.
AT+CGDCONT=1,
"IP","CMNET"
ATD*99#
OK
CONNECT
Cancel a context using the terminal
equipment
Pause data transfer and enter Command
mode by +++
Stop the GPRS data transfer
AT+CGDCONT=1,
"IP","CMNET"
ATD*99#
+++
ATH
OK
CONNECT
OK
OK
Reconnect a context using the terminal
equipment
Resume the data transfer
AT+CGDCONT=1,
"IP","CMNET"
ATD*99#
+++
ATO
OK
CONNECT
OK
CONNECT
*Quality of Service (QOS) is a special parameter of a CID which consists of several parameters
itself.
The QOS consists of
The precedence class
The delay class
The reliability class