... 2+5,Output power: - Class 4 (2W) for GSM900 - Class 1 (1W) for GSM18006, SIM Application Toolkit7,Control via AT commands ... text and PDU mode, cell broadcast5,Fax Group 3, class 1 and class 26,High quality voice support for handset, headset ... TTY modemSpecial Features1,Serial interface modem driver for Microsoft® Windows 7™, Windows XP™ and Windows Vista™2,Firmware update via serial interface3,Real time ...