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Help CenterGPRS/CDMA DTU Modem With RS232/422/485 Serial Ports
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1.Features
★Provide high-speed、forever online Virtual private data communication network of transparent transmission data.
★ Support GPRS/CDMA net work which have wide coverage and good signal, can realize transparent transmission of data.
★Support voice dialing, point-to-point text message transmission.Stable reliable and automatic connection when disconnection.
★ Easy to install and debug, in general, users only need to set server address and port number to connect to the server.
★ Detailed diagnostic information for user to troubleshoot.
★ When the no-data transmission with the sever is beyond 1 minute, the data is automatically sent to the server.
★ The default baud rate is 9600bps, no check bits, 8 data bits, 1 stop bit .In addition to the baud rate, the data bits, stop bits, and check bits can not be set.Support network access.(the APN, user name, password should be configured correctly)
★The application scope is wide, especially suitable for the transmission of medium and small amount data .Have RS232/422/485 or TTL level interface, mainly for electric power system automation, industrial monitoring, traffic management, meteorology, environmental protection, network monitoring, the application of financial and securities industries, using GPRS/CDMA 1 x network platform to realize the transparent transmission of data information, at the same time, considering the need of each network application department to realize virtual private networks (VPNS) data on the network structure.
2.Technique Data
★GPRS data: GPRS Class 10,Coding scheme: cs1-cs4, conforming to SMG31bis technical specification
★CDMA 1×data: Supports IS 707 data business, supports 153kbps package data rate, supports Class 2.0 Group3 fax, CDMA 2000 amplifies, conforming to the standard of the is-95a, is-95b CDMA air interface.
★ Antenna interface: 50 ohm/SMA sub.
sim/uim card
Serial data and configuration interfaces
Type RS-232/RS-422/RS-485/TTL
Data rate 300-57600bits/S
Interface terminal Pluggable terminals, spacing: 3.5 mm, 12pin
★Power supply: voltage + 5V - + 26VDC ripple is less than 300mV
3. Power Consumption
| GPRS | Standby: 80mA@+5VDC, 30mA@+12VDC |
| GPRS | Data transmission: 120-350mA@+5VDC, 50-140mA@+12VDC |
| CDMA | Standby: 80mA@+5VDC, 30mA@+12VDC |
| CDMA | Data transmission: 260mA@+5VDC, 110mA@+12VDC |
★ Size: 112.5×70×22mm (don’t contain antennas, plugs and installers)
★Weight: about 180g
★work environment temperature
| GPRS | Working temperature:-20℃-- +55℃ |
| GPRS | Storage temperature:-25℃-- +70℃ |
| CDMA | Working temperature:-30℃-- +75℃ |
| CDMA | Storage temperature: -40℃-- +85℃ |
★Relative humidity ≦95% (No condensation)
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