摘要
CID信号发生器模拟电信局终端程控交换机产生主叫识别信息传送 ,用于对来电显示器或带来电显示的电话机进行性能测试。本文简要介绍CID信号传送方法和传送协议的有关国家标准 ,提出一种基于单片机的FSK制式CID信号发生器的电路结构方案及信号序列的产生方法。据此设计出的CID信号发生器简单可靠 ,可提供多种模式的测试编码 ,输出信号电平连续可调 ,完全符合使用要求。
CID (Calling Identity Delivery) signal generator simulates the CID of exchange terminal interface for testing the function of telephone sets with CID or CID monitor. This paper briefly introduces the national standards concerning CID signal transmission method and transmission protocol, and presents a new circuit for CID signal generator and the involving methodology in generating CID signal sequences. With this design the generator is reliable and simple in structure, and various modes of testing codes are provided. the signal level can be adjusted continually and it accords with the demands in practical testing.
出处
《电子测量与仪器学报》
CSCD
2003年第3期33-36,共4页
Journal of Electronic Measurement and Instrumentation
