... Port,Quad-band,wok over the world,support 64 sim cards,IMEI number is changable,Supoort bulk ... call & bulk SMS, Hotspot Gateway,16 Ports 64 SIM Cards GSM FWT Gateway,GSM Gateway Call Termination ... the function of theemulation phone exchanger and supply 64 GSM SIM cards and 16 analogical ports. ... GSM850/900/1800/1900Mhz . Working environment:Windows7,Vista,XP,2003/2000,Linux,Mac...OS.Four RJ45 Interface, ...