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Brief description of the detection of the use of stations in the central offices private automatic and installation for implementing the process
Brief description of the detection of the use of stations in the central offices private automatic and installation for implementing the process
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机译:简要说明检测中心局专用自动站中的站的使用以及执行该过程的安装
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摘要
A circuit arrangement for detecting the use of telephone extensions in an automatic private branch exchange 9 with a plurality of internal lines 5 to 8, wherein an identifying signal is fed into the subscriber line 13 and, after passing the exchange 9, is derived from one of the internal lines 5 to 8, to indicate for storage and analysis the extension which set up or took over the telephone connection with an outside subscriber. The arrangement also includes a safeguard means 15 for detecting and displaying the occurrence of faults on any of the internal lines 5 to 8. IMAGE
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