Line repeater for telephone system using radio links

Details Line repeater for telephone system using radio links Line repeater for telephone system using radio links

1979-12-21

1982-03-16

Konick, Bernard

179 2EB, 179 16EA, H04B 336, H04B 700

Patent

active

043202659

ABSTRACT:
A telephone exchange communicates with a number of scattered local stations via radio links extending from a central terminal to respective peripheral installations each comprising a radio transceiver coupled via a repeater to the line loop of an associated local station. The repeater includes a constant-current generator, combined with a polarity inverter, which is controlled via a logic network in response to signals from the exchange and from the local station (detected by a sensor in the line loop) to reverse the flow of direct current for the transmission of binary pulses to the local station. In the case of a private subscriber, these pulses may be an intermittent square wave generating a ringing signal; in the case of a public pay station they may constitute commands for the collection of tokens or coins.

REFERENCES:
patent: 3586787 (1971-06-01), Vogelman et al.
patent: 3610833 (1971-10-01), Lebegue
patent: 4039760 (1977-08-01), Gregory et al.

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