... 4,software support 5,serial port gsm modem The device built-in 16 wireless modules can be inserted 16 SIM cards, ... text messages. Key Features♦USB/RS232 GSM modem pool♦Based on Wavecom industrial modules Q24plus,Q2406,Q2303,Q2403♦GSM: 850/900 ... , and institutions♦Large hospitals, large bookstore♦Newspaper, television and radio stations♦Oil Company ( other chain business model)♦Government agencies or ...