... Interface: RS232, RS485 Standard and Band: GSM850/900/1800/1900MHz 3G modem. Designed with industrial grade, supports SMS, CSD, RS232, AT Commands ... /UL)5. EDGE: 236.8kbps(DL/UL)6. GPRS: 85.6Mbps(DL), 42.8Kbps(UL)7. Support SMS, CSD and data ...