会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Telephone line and instrument tester
    • 电话线和仪器测试仪
    • US4827498A
    • 1989-05-02
    • US642187
    • 1984-08-17
    • James W. Ross
    • James W. Ross
    • H04M1/24
    • H04M1/24
    • A telephone line and instrument tester is disclosed which is operable by a consumer for determining whether a malfunction in a telephone system is caused by a malfunction in a telephone instrument of the system or by a malfunction in source related equipment of the system, such as a telephone line leading to a jack of the system. The tester is receivable in a modular telephone jack for testing the operation of source related equipment of the system and a modular plug of a telephone cord is receivable in the tester for testing the operation of a telephone instrument attached to the cord. A circuit in the tester is responsive to the flow of current therethrough for providing an indication of the operation of the source related equipment and/or the telephone instrument.
    • 公开了一种电话线路和仪器测试仪,其可由消费者操作以确定电话系统中的故障是由系统的电话机器的故障引起的还是由系统的源相关设备的故障引起的,例如 电话线通向系统的插孔。 测试仪可接收在模块化电话插孔中,用于测试系统的源相关设备的操作,电话线的模块插头可接收在测试仪中,用于测试连接到电话线上的电话乐器的操作。 测试器中的电路响应于其中的电流流动,以提供源相关设备和/或电话设备的操作的指示。