RS232 GSM GPRS MODEM POOL Base on Wavecom Q2403A Module Dual-band (900/1800 MHz RS232 GSM GPRS MODEM ... ) Products Interface: 4/8Port RS232 Products Module: Base on Wavecom Q2403A Module Products Band: Dual-band (900/1800 MHz) Products function ... casing dB9 RS232 interface with voice function Based on Wavecom Q2403A Module 3V 8 SIM card slot SIM Application Toolkit Double ...