SU1327318A1 - Method of transmitting call signal and signal of monitoring call transmission in device of dispatchersъ communications - Google Patents

Abstract

The invention relates to telephony and provides for an increase in the accuracy and reliability of receiving a call by one-time control of the loop of the subscriber line of the selected subscriber. To submit a call to a handset (MTT) 1, for example, subscriber A is set to vertical position 4 a.A. 6 icd. In this case, the contacts of the mercury switch 8 disconnect the electroacoustic conversion circuit. converter (EAP) 6 and send a call to the call on the loop of subscriber line 4 to the side of the linear relay 9. Relay 9 turns on the bridge 5 of the microphone circuit power. The power supply voltage of the microphone circuits of subscriber B is converted into electroacoustic by means of EAP 6. oscillations of the tonal frequency and with the help of microphone 3 are regenerated into the e-signal of the same frequency, which is connected via a loop of line 4, is sent to the MTT circuit of subscriber A as a control signal of a call. This signal is converted to acoustic, oscillations and listened to, convincing of the reliability of receiving a call by subscriber B, as well as the condition of the telephone and loop of line 4 on subscriber's side B. Termination of the call is carried out by raising MMT 1 of subscriber B to a vertical position. 1 il. о S (Л сою со: оо

Description

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The invention relates to telephony. And can be used in dispatch communication systems and intercom devices.

The purpose of the invention is povigenie accuracy and reliability of receiving a call by simultaneously monitoring the loop subscriber line vyzayaemoy subscriber.

The drawing shows a block diagram of a device that implements a method for transmitting a ring signal and a call control signal to a dispatcher communication device.

Gadgets. It contains a micro-telephon tube 1, a telephone 2, a microphone 3, a subscriber line 4, a power supply bridge 5; micro circuits, an electro-acoustic transducer 6, a call optical indicator 7, a mercury switch 8, a linear relay 9.

A device that implements the method of transmitting a ringing signal and a ring back tone in the control room devices works as follows.

In the initial state, the handsets 1 of subscribers A and B are placed in a horizontal position. To submit a request for a call, the microtelephone handset 1, for example, subscriber A, is tilted to a vertical position, while the contacts of the mercury switch 8 disconnect the electroacoustic converter 6 conversion circuit and send a call to the line 9 of the subscriber line.

Linear relay 9, having received a call, includes a bridge 5 supplying microphone circuits, which supplies power to the microphone circuits of the handset 1 of both subscribers. The power supply voltage of the microphone circuits on the subscriber's side B is converted into electroacoustic oscillations of the tone frequency using electroacoustic transducer 6 and regenerated into an electrical signal of the same frequency that the telephone line of the telephony tube 1 is sent via the microphone 3 subscriber A as a ring back tone. In the telephone circuit, this signal is converted by P acoustic vibrations and subjectively listened to, convincing of the reliability of the call received by subscriber B,

and also in serviceability of the telephone set and subscriber line 4 galeyf on subscriber B.

The termination (call admission is carried out by raising the handset 1 of subscriber B to a vertical position, while the contacts of the mercury switch 8 break the circuit

electroacoustic converter 6, the second output of the mercury switch 8, connected to the input of the linear relay 9, sends a control signal to turn on the linear relay 9, after which the power supply of the microphone circuits of the1.1 microtelephone tubes is activated through the contacts of the mercury switches 8 and establish a conversational state.

The call from subscriber B is made similarly to the call from subscriber A.

At the end of the conversation, the subscribers are disconnected from each side by placing the tubes in a horizontal position, while the contacts of the mercury switches break the power supply of the microphone circuits on the A and B side, respectively. To prevent repeated calls when only one of the subscribers is switched off, the linear relay 9 provides clear both subscribers.

Claims (1)

Formula invented and. A method of transmitting a ringing signal and a call control signal in dispatching communication devices, consisting in sending a subscriber line voltage of a microphonic circuit to the telephone line, generating a call sprinkle control signal, which is converted into an acoustic signal on the caller side and generating a signal sent to the called subscriber, and converting his scientific research institute into an acoustic signal, characterized in that, with a cent-r, you can determine the accuracy and reliability of the reception of a call by simultaneously monitoring yfa callee subscriber line, sending a plume of subscriber line supply voltage circuit of the microphone is performed simultaneously with sending a ringing signal, the supply voltage microtelephone 31327318 the circuits on the side of the called subscriber of the call control signal, when acoustic signals are transformed after the subscriber’s response to the terminating frequency, they are regenerated by the conversion of the supply voltage, the electrical signal and sprinkled into the subscriber-line acoustic signal as a rolls.