Description: GSM Modem Pool 16 Ports 64 Sims , Model no.: ETS-1664 (it has 16 ports, each ports has 4 SIM card slot,totally 16 ports 64SIMs, USB type interface) is a newly developed GSM/GPRS Modem pool solution which can automatically realize SIM rotation when do SMS sending, it can effectively lower the SIM block by carriers. And improve the SMS sending efficiency. Can preset the SIM rotation rule through hyper terminal of PC by AT command, then the device will automatically do SIM rotation according to the rule. Specifications: 1, GSM Modem Pool 16 ports 64 SIMs slot; 2, GSM 900/1800/850/1900Mhz Quad band (Quectel M35 module employed); 3,Automatically SIM rotation; 4,IMEI Changeable through Hyper terminal of PC; 5,USB 6,AT Command Main Features: 1,Can Support 16 channels simultaneously; 2,Can insert 64 SIM cards(each port 4 SIM cards) 3,Connect with the Computer through USB Data cable 4,Each channel with separate power switch, 5,Each channel can be demolished separately. 6,Comply with GSM Phase 2 standard. 7,USB Interface 8,Can send and receive SMS in bulk 9, Industrial Chassis, Elegant Appearance design. 10, support Windows XP, Windows7, Linux, Unix OS etc. Basic Features 1,Asynchronous, transparent or non-transparent, to a maximum 14400 bits/s, 2,Buadrate: 115200 bits/s 3,Automatic baud rate: from 2400 to 19200 bits/s 4,GPRS compatible 5,SMA antenna interface 6,SIM card Outlet 7,built-in Adapter: 12V 3A 8, USB ports support 9, AT command control ( GSM 07.07 and 07.05) Hardware Features: Meet the ETSI GSM 2 + standards Class 4 ( 2W @ 900 MHz) Class 5 ( 1W@1800 MHz) Operating Temperature: -20 ° C - + 55 ° C Storage temperature: -25 ° C - + 70 ° C Device Size: standard GSM Modem Pool chassis Weight: 5Kg per unit Application: Large shopping malls, supermarkets Professional market, large wholesalers Large hotels, large-scale entertainment Large agencies Transport, logistics industry Large enterprises, and institutions Large hospitals, large bookstore Newspaper, television and radio stations Oil Company ( other chain business company) Government agencies or large township Installation: Step 1: Connect the device through USB Data cable. Step 2: Insert SIM card into the SIM card slot, connect antenna, power on the device. Setp 3: Install the SMS caster (Or other SMS software), open the software then it is ready to send SMS now.