A GPRS device, which resembles a modem with an extended at command set, must define a context using an at command before it enters data mode.
GPRS设备类似于拥有扩展AT命令集的调制解调器，在进入数据模式之前必须使用AT命令定义一个上下文。
This system uses a wireless modem with USB port based on SIM300 GPRS module and the MAS device of China Mobile.
基于原有的SIM300GPRS模块和移动公司的MAS设备，研发USB接口的无线调制解调器。
The monitored data information is transmitted remotely to higher environmental protection departments through the wireless GPRS and a modem.
将监测的数据信息通过无线gprs经调制解调器远程传输到上级环保部门。
The monitored data information is transmitted remotely to higher environmental protection departments through the wireless GPRS and a modem.
将监测的数据信息通过无线gprs经调制解调器远程传输到上级环保部门。
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