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SIM900 AT Command Manual

SIM900_AT Command Manual_V1.03 228 12/24/2010

attachment is automatically done by the

AT+CGACT Command.

Use the defined and activated CID

to get online. The mobile can be

connected using the parameters of

appointed CID or using default

parameter

AT+CGDATA="PPP",

CONNECT

The mobile supports Layer 2 Protocol (L2P) PPP only.

Note: If the mobile is NOT attached by AT+CGATT=1 and the CID is NOT activated before

connecting, attaching and activating is automatically done by the AT+CGDATA Command.

Some providers require using an APN to establish a GPRS connection. So if user uses the

Microsoft Windows Dial-Up Network and ATD*9… to connect to GPRS, user must provide the

context definition as part of the modem definition (Modem

properties/Connection/Advanced…/Extra settings.) As an alternative, user can define and activate

the context in a terminal program (e.g. Microsoft HyperTerminal) and then use the Dial-Up

Network to send only the ATD Command.

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Elec Freaks Bluetooth Modem Spécifications Page 228