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1. 发明授权

US5422929A Telephone line repeater and method of testing same 失效
标题翻译：电话线路中继器及其测试方法
公开(公告)号：US5422929A
公开(公告)日：1995-06-06
申请号：US791251
申请日：1991-11-13
申请人： George J. Hurst , Joseph F. Sturbois
发明人： George J. Hurst , Joseph F. Sturbois
IPC分类号： H04B17/40 , H04B3/46
CPC分类号： H04B17/406
摘要： A telephone line repeater (28) includes a pattern decoder/recognizer (100) which recognizes, inter alia, an input interrogating signal transmitted on a telephone network (20). The interrogating signal includes an address field (302) having at least one subfield (304) therein. The pattern decoder (100) determines that its repeater (28) is to be tested, if a predetermined subfield (304) of the interrogating signal is configured according to a predetermined select convention. When the repeater (28) recognizes that it is being addressed, a controller (110) causes the addressed repeater to "loop back", returning, in alternating sequence, test-indicative no-operation signals and diagnostic information ("DSM") signals generated by the repeater. Methods for testing a repeater and methods for testing telephone networks are also disclosed.
摘要翻译：电话线路中继器（28）包括模式解码器/识别器（100），其特别地识别在电话网络（20）上发送的输入询问信号。询问信号包括其中具有至少一个子场（304）的地址字段（302）。如果询问信号的预定子场（304）根据预定的选择约定进行配置，则模式解码器（100）确定要对其中继器（28）进行测试。当中继器（28）识别到它被寻址时，控制器（110）使所寻址的中继器“环回”，以交替顺序返回测试指示的无操作信号和诊断信息（“DSM”）信号由中继器生成。还公开了用于测试中继器的方法和用于测试电话网络的方法。

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