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 ,criterion,communal 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 equipment 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 intern 10.Comply with gsm phase 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.