介绍了程控电话交换机追查恶意呼叫和主叫用户信息识别业务的各种识别方法 ,特别是详细介绍了利用话务台和话机上的“R”键转接的功能 ,以及利用能显示主叫信息的话机来显示主叫电话号码和追查恶意呼叫电话的方法。说明了利用能显示主叫信息的话机来显示主叫信息 ,是程控电话交换机的一种新业务。 Introduced the program-controlled telephone exchange tracing malicious calls and caller identification services identify various identification methods, in particular, introduced the use of consoles and telephone “R” key transfer function, and the use of caller information can be displayed Phone to display the calling number and to track down the malicious calls. The use of a telephone capable of displaying caller information for displaying caller information is illustrated as a new service for a programmed telephone exchange.