... Modem based on mc39i (900/1800mhz) 1. The Modem based on mc39i (900/1800mhz) without tcp/ip stack Industrial design. Aluminum casing. Wireless access to internet ... . Fax group3, class 1,2. Maximum transmitting speed 115kb/s. Gprs class 10. Antenna with high sensitivity. Always on-line. Output ... adaptor, rs232 cable, antenna, 2 mounting plates, cd. RS232 GSM /GPRS modem with siemens MC39I module