USR-G761W is a 3G WCDMA DTU. It is designed for connect serial to cellular network. It can worked in WCDMA/GSM, support HSDPA(7.2Mbps) high speed downlink transmission, and HSUPA(5.6Mbps) high speed uplink.
Support 2G GSM/GPRS/EDGE and 3G WCDMA/HSPA.
Support 2 network connections online simultaneously, support TCP and UDP.
Support network registration packet.
Support heartbeat packet to serial or network.
Support set the parameter remotely by SMS
Support multiple working mode: SMS transparent transmission, network transparent transmission, HTTPD mode.
Support send Chinese/English SMS by AT command.
Support RFC2217 function, the parameters of interface can be revised.
1) AT command configuration.
2) software configuration
1. Network transparent transmission mode
In this mode, User’s device can send data to specified server by WCDMA network. G761 support 2 socket link, that is Socket A and Socket B, two links is mutual independence.
2. HTTPD Client Mode
In this mode, the data will sent to HTTP server directly, or obtain data from HTTP server. The data will sent to Web server(apache, IIS, tomcat, etc) in Http(GET/POST) mode as long as sending data in formal format. User can utilize the scripting language like PHP, ASP as database storage.
3. SMS transparent transmission mode
In this mode, user’s device can send SMS to specified phone, or transmit the SMS from phone to device. The transparent transmission between device and phone can realised by parameter setting.
4. AT command
When G761W working in any kind of mode(Network transparent transmission, SMS transparent transmission, AT command), user can send specified data, then let WCDMA switch into AT command mode.