The PV-1800 PC/104 GSM/GPRS modem board combines a GSM/GPRS dual-band 900/1800-MHz modem with its own 20-W power supply. The board also has eight isolated analog inputs with a 12-bit analog-to-digital converter, eight opto-isolated digital inputs, seven opto-isolated high-current (500-mA) digital outputs, and a spare RS232 port. TCP/IP over GPRS software is included. Its operating temperature ranges from ?20°C to 70°C. The PV-1800 costs $693.
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