Switching arrangement for telecommunications systems

Details Switching arrangement for telecommunications systems Switching arrangement for telecommunications systems

1974-09-25

1976-08-10

Robinson, Thomas A.

H04Q 324

Patent

active

039743420

ABSTRACT:
A circuit arrangement for identifying one of two or more subscriber sets connected to a common trunk over branch circuits is described. A parallel arrangement of a capacitor and a threshold diode is inserted in at least some of the branch circuits. An electronic switch is connected across the latter parallel circuit, and it can be switched to a conducting state at the voltage level normally applied to the common trunk. Prior to the electronic switch reaching its conducting state, a voltage builds up on the capacitor, the value of which voltage is dependent of the breakdown level of the diode. This voltage on the capacitor identifies the subscriber set associated therewith.

REFERENCES:
patent: 3231680 (1966-01-01), Yamato et al.
patent: 3508010 (1970-04-01), Schuberth
patent: 3813500 (1974-05-01), Roberts

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