After that this paper introduces the characteristic and function of SMS MODEM, describes the applications in attendance system.
随后介绍了短信MODEM这种新兴事物的功能、特性，以及在考勤系统中的应用。
A new design of RF block diagram, digital baseband block diagram of CDMA modem, the form and working-process are analysised, in order to expand function, a system connector is designed.
文中提出了一种CD MA调制解调器射频电路和数字基带处理电路框图，分析了它们的组成及工作过程，设计了扩展功能用的系统连接器。
The main function of the MODEM communication module is to transmit the acquired data to the upper computer by the serial communication of RS-232C.
MODEM通信模块的主要功能是将采集到的数据通过RS - 232c串行通信传送给上位机。
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