... 32 SIM cards (big or small) 4.gsm modem with external antenna GSM Modem 32 sim cards, RS232/USB, BULK SMS/ ... command control ( GSM 07.07 and 07.05) gsm modem with external antenna Application ♦ Large shopping malls, supermarkets♦ Professional market, ... C - + 70 ° C♦Size: standard 1U chassis gsm modem with external antenna Supported operating systems-Windows 7 (Home, Premium, Pro, Ultimate, Enterprise ...