Research SIM 900A - GSM GPRS SIM900 A Modem Features and Datasheets; Key Features; Datasheet Links

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GSM GPRS SIM900A MODEM
REV1.0
Features
 Dual-Band GSM/GPRS 900/ 1800 MHz.
 RS232 interface for direct communication with computer or MCU kit.
 Configurable baud rate.
 Power controlled using 29302WU IC.
 ESD Compliance.
 Enable with MIC and SPeaker socket.
 With slid in SIM card tray.
 With Stub antenna and SMA connector.
 Input Voltage: 12V DC.
 Jumper settings to choose between USB mini and rs232
Datasheets
 AT Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnTkJwSll3dnhK
bTg/edit?usp=sharing
 FTP Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnVkhacjUtY2tIU
2c/edit?usp=sharing
 TCP/IP Commands datasheet
https://drive.google.com/a/researchdesignlab.com/file/d/0BzrGD4zr88GnUHRCQlJwUjd
WTVU/edit?usp=sharing