SU1732488A1 - Telephone line concentrator - Google Patents

Abstract

This invention relates to a telephone communication technique. The goal is to simplify the device and reduce power consumption. The device contains a telephone set 1, a connecting unit 2 containing a polarized relay 3, capacitors 5, 11 and 12, resistors 8, 13 and 18, a diode bridge 6, an LED 7, diodes 9 and 16, a thyristor 10, a Zener diode 14, an optoelectronic switch 15. When a call is received on one of the telephone lines 3, the corresponding polarized relay 3 is activated, and the telephone set 1 is connected to this line. At the request of the subscriber, pressing the button 17 can be connected to the appropriate line. 1 il.

Description

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The invention relates to telephone communication devices and can be used in telephony peripheral devices.

The aim of the invention is to simplify the device and reduce power consumption.

The drawing shows a structural electrical circuit of the hub.

A telephone line hub contains a telephone set 1, connecting unit 2, winding 3 of a polarized electromagnetic relay, two telephone lines 4, first capacitor 5, diode bridge 6, LED 7, first resistor 8, first diode 9, thyristor 10, third capacitor 11, a second capacitor 12, a second resistor 13, a zener diode 14, an optoelectronic switch 15, a second diode 16, a button 17, and a third resistor 18.

The hub telephone line works as follows.

The calling current coming from the telephone line 4 passes through the first capacitor 5, the positive branch of the diode bridge 6, the LED 7, the first resistor 8, the second resistor 13, the zener diode 14, the control electrode of the thyristor 10 and the minus branch of the diode bridge 6. Thyristor 10 opens and turns on the current in the winding 3 of the electromagnetic relay from the diode bridge 6, and also due to the discharge of the third and second capacitor 11 and 12 through the first diode 9. The relay, having triggered, closes its contacts 3-1 and 3-2 to the telephone line 4 telephone 1.

The calling current to the telephone set 1 is supplied through the second diode 16 or the optical emitter 15-1 of the optoelectronic switch, and the bell rings during its arrival, and the light receiver 15-2 of the optoelectronic switch shorts the second winding 3 of the polarized electromagnetic relay, automatically blocking the telephone switch device 1 to the second telephone line 4, after the receiver's handset is removed: the phone 1 stops ringing and the switch-over lock continues as the optoelectronic switch 15 o covered by the power supply current of the telephone 1. When a call is received on the second line 4, the corresponding LED 7 is on during the first line,

Manual selection (connection) of line 4 to telephone set 1 is accomplished by briefly pressing the corresponding button 17, 9, which causes the contact to be closed shorting the first capacitor 5, and direct current is supplied to the winding 3 of the electromagnetic relay from one of the telephone line 4. The relay operates similar to an alternating current call.

Thus, to the telephone set 1 at the request of the subscriber, by pressing the button 17 of one of the telephone lines 4, the corresponding line is connected.

Claims (1)

Invention A telephone line hub containing two telephone lines, each of which a telephone device is connected through the switching contact of the corresponding relay, and a connecting block containing two resistors is connected to each telephone line, the first a capacitor, a zener diode, two diodes and a button, characterized in that, in order to simplify the device and reduce power consumption, an optoelectronic switch, a diode bridge, an LED, a second and third capacitors, a third resistor and a thyristor, and the first telephone wire are inserted into each connecting unit the line is connected to the first terminals of the light emitter of the optoelectronic switch and the first capacitor, in parallel with which the button is turned on, the second output of the first capacitor through the parallel-connected plus branch of the diode bridge, led, first resistor, first the diode is connected to the first output winding of the relay, the second output of which is connected through a series of thyristor and the minus branch of the diode bridge to the second wire of the telephone line; parallel which includes a third resistor, the second terminals of the second capacitor, the light-receiving optoelectronic switch connected to the first output of the third capacitor and the cathode of the thyristor, the second the output of the third capacitor is connected to the second output of the LED, the second output of the light emitter of the optoelectronic switch, in parallel with which the second diode is connected, is connected to the corresponding the output of the switching contact of the relay, and the polarized electromagnetic relay is used as the relay.