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。
Moreover, a SMS sending and management platform which is compatible with the wireless modem mentioned above is developed.
与此无线调制解调器硬件设备相配套，开发相应的图书馆短信发送与管理平台。
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