1.Wavecom GSM Module Q2303A WISMO2C  WISMO2C2
2.wireless module  GSM Module
3.Dual band

2.1 General information
WISMO2C2 is a self-contained E-GSM/GPRS 900 / 1800 (or E-GSM/GPRS 900 /
1900) dual band module including the following features :
Size :58.3 x 32.2 x 6.0 mm 

Watts EGSM radio section running under 3,6 Volts
Watt GSM1800/GSM1900 radio section running under
3,6 Volts
Digital section under 2.8 Volts
3V SIM interface
Real Time Clock with calendar
Battery charger
Echo Cancellation + noise reduction
Full GSM or GSM/GPRS software stack
Complete shielding 

RF cable

  BTB connectors

q2303a modem  usb

Q2303A modem  rs232
WISMO2C2 has two external connections :
RF connection pads (to the antenna) or RF connector with
MMS RF connector (RADIALL)
General Purpose Connector (GPC) to Digital, Keyboard,
Audio and Supply
WISMO2C2 is designed to fit in very small terminals and only some custom
functions have to be added to make a complete Dual Band solution: