... receiving, sending to one party or sending to multi parties;With access to data center fixed IP address ... of Tri-frequency GSM900/1800/1900 MHz (or quad-frequency GSM 850/900/1800/1900MHz);Support SMS, DTMF;Data ... ;Data CSD: Transmissions rates 2.4, 4.8, 9.6, 14.4Kbps;Data Fax: Group 3 Class 1;SIM Card: ... 1.8V, 3V;l InterfaceRS232: serial data rate of 1,200~115,200bits/s;USB: USB2.0 ...