Hsupa: 5.76mb/S, Hsdpa: 7.2mb/S RS485: a, B Interface: RS232, RS485 Standard and Band: GSM850/900/1800/1900MHz 3G modem. Designed with industrial grade, supports SMS, CSD, RS232, AT Commands, with the function of accessing internet by dial-up, etc. It has been used for sending SMS, alarm system, data transmission, etc .Detailed information A. Wireless Specification1. UMTS/WCDMA/HSDPA/HSUPA 850/ ...