Circuit arrangement for subscriber telephone sets powered via the subscriber line with electronic control and switching means in telecommunications systems, in particular telephone systems

作者： Siegmund Reinhard Dipl-Ing

DOI:

关键词: Telephone exchange 、 Electrical engineering 、 Single-pair high-speed digital subscriber line 、 Digital subscriber line 、 Asymmetric digital subscriber line 、 Electronic engineering 、 Subscriber loop carrier 、 Line card 、 Circuit switching 、 Engineering 、 DSL modem 、 Telecommunications

摘要: The circuit arrangement for subscriber telephone sets powered via the line with electronic control and switching means in telecommunications systems, particular essentially comprises a capacitor which is charged initially wires order then to supply current an closes loop. loop remains blocked transistor during charging process. same also used block when device can maintain low impedance.

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参考文章(2)

Tetzlaff Hartmut Ing Grad, Keyboard dialling telephone circuit - generates defined output potentials and uses bistable relay whose contact closes capacitor charging circuit on diode blocking ,(1977)

Losehand Helmut Dipl Ing, Telephone instrument for impulse type number selection - with switched low impedance path to facilitate subscriber identification by exchange ,(1981)

Circuit arrangement for subscriber telephone sets powered via the subscriber line with electronic control and switching means in telecommunications systems, in particular telephone systems

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Circuit arrangement for subscriber telephone sets powered via the subscriber line with electronic control and switching means in telecommunications systems, in particular telephone systems

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