1, modem gsm siemens tc35i 2,sending&recieving bulk SMS 3,with bulk sms software 4.8 SIM cards slots 5,AT Command Highlight 1 High-speed bulk sms sending ,each port can send 600 pcs of sms within 1 hour. 2 Brand new first hand modules.Wavecom ,Cinterion,Qualcomm chipsets available. 3 Support IMEI change with software,easier to operate,better user experience. 4 Adaptable to all open AT commands,keep working under status of " Hardware". 5 Internal adapter to assure stable voltage & excellent working environment. Product description: TC35i SMS,MMS 900/1800 Key Feature: 1.Just like 8 single-channel equipments work at the same time 2.insert 8 SIM cards(big or small 3.connection with the computer through a data line be integrated with Serial 8 4.Each channel with separate power switch 5.Each individual module be demolished 6.industrial chassis, elegant shell 7.GSM frequency: 900/1800 MHZ 8.8 SIM card(big/small) slots 9.Wireless access to interne 10.Comply with GSM phase2 standard 11.Dual-band/Quad-band(optional) 12.RS-232/USB interface(optional) 13.8 SIM Card supported (Big/Small) 14.Optional data,voice function 15.send and receive English SMS in bulk Basic Feature: -Asynchronous, transparent or non-transparent, to a maximum 14400 bits / s -Baud Rate : 300-115200 bits / s -Automatic baud rate: from 2400 to 19200 bits / s -Fax support three -Switched voice and fax -V.42, V.42bis -GPRS compatible -WAP compatible -SMA Antenna Interface -SIM Card Outlet -Power connector -RS-232, the Mini-DB-9 connector -AT command control ( GSM 07.07 and 07.05) 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 model) -Government agencies or large township\ Hardware Feature: -Support dual-band GSM: 900/ 1800 MHz -Meet the ETSI GSM 2 + standards -Class 4 ( 2W @ 900 MHz) Class 5 ( 1W @ 1800 MHz) -5 -24 VDC power supply (which be directly connected to the nickel- metal hydride or lithium batteries) -Operating Temperature: -20 ° C - + 55 ° C -Storage temperature: -25 ° C - + 70 ° C -Size: standard 1U chassis