JPS586655A - Calling device - Google Patents

Abstract

PURPOSE:To reduce the number of cables laid between a master calling device and subordinate calling devices, by connecting the subordinate calling devices in parallel to a common voice line, and sending out a call and a selection signal to every subordinate calling device through control lines. CONSTITUTION:When a call switch 7a is pressed, a photocoupler 20 turns on to turns on the lamp 21 of a selection display circuit 6a. When any of call switches 7b-7n is pressed, a corresponding lamp turns on. Therefore, a person in change conforms which subordinate calling device should be put in a calling state next on the basis of the lamp indication. When a selection switch 5a is closed, a photocoupler 30 turns on, so a current flows through the relay 31 in a connection control circuit 8a to close a contact 4a, so that a subordinate calling device 2a is connected to a voice bus line 3 and then held in the calling state. When any of selection switches 5b-5n is closed, a corresponding subordinate caling device is held in the calling state similarly.

Description

[Detailed description of the invention] This invention relates to a communication device.

A central monitoring device that centrally monitors station equipment such as automatic ticket vending machines and IL ticket inspection machines is equipped with a call switch and a call switch on each station equipment, allowing you to call the monitoring station! l! A selection display circuit consisting of a dexterous call table pre-winding selection circuit and a pre-winding selection switch are provided, and when the call switch is pressed down, a call is made between the calling team of the station equipment having the switch and the calling moth device of the monitoring station. The line is now activated so that customers and the guardhouse staff can communicate.

The telephone equipment used in this centralized monitoring system generally requires cables for one-time handsets and a cable for a call switch for each call channel and each call switch, and therefore the cables installed for each station service equipment are required. There were a lot of them (and they were expensive).

Takaaki Moto focused on the fact that the communication device and the communication channel communicate on a one-to-one basis, and connected the communication channels in parallel to a common audio bus.
It is an object of the present invention to provide a telephone communication device which can reduce the number of cables installed between a communication device and a communication channel by transmitting a calling signal and a selection signal through a control line for each pre-winding call. do.

An embodiment shown in one drawing will be described below.

In the figure, reference numeral 1 denotes a telephone call station provided in a parent device such as a monitoring device, and %2at2b...2n indicate telephone call stations individually provided in child devices such as station equipment. Each call advance volume 2a.

2b...2n are connected to the communication device 1 via relays 4a, 4b...4n and a voice bus 31.

Call layer s) 1 (parent device 11) K is selection switch 5a, 5b, 5n and 1 for selecting the call team to make one call.
A pair of selection display circuits 6ae6b...6n is provided for each pre-call call, and a control circuit connected to discharge switches 7a, 7b...7n for customers to call the attendant is provided on the side of the first call slave (slave device). A pair of sa, sb...8n is provided for each pre-winding call.

The selection switches 5a, 5b...5n are switches for manual return lids, and the call switches 7at7b...7n are switches for automatic return waves that open and close when pressed down. Each switch 5ae5b...5n and ra #71)
... 7n are commonly connected to the negative terminal of the DC power supply 9.

Connection control circuits 8a, 1b- for selection display circuits lia, 6b...6n and corresponding call channels 2a, 2b...2n
8n is individually connected to the control circuits 110a, 10b, .

The selection display circuits 6a, 6b...6n are connected to the call switch I.
When a call signal indicating that the switches m, 7b, .
This is a selection signal that is output to the control line when 5n is closed, and one of them, as shown in 6a as a representative, is the circuit 5 that turns on the hot turn signal 9 when the call signal is turned on.
20, a lamp 21 that is energized when the photocoupler is turned on, a diode 22 connected in parallel and in the opposite direction to the photocoupler's light emission, and a resistor 23.

The connection control circuits 9a, 8b...8n are connected to the call switch 7.
a, 7b...In is closed, a call signal indicating this is output to the control line, and the 1 selection switch sa,
When a selection signal indicating that sb...5n is closed is input via the control line, the corresponding contact 4ae
4b...4n is closed and the communication terminal *2a, 2b...2
One of the circuits is a photocoupler 3 which is turned ON by the control signal as shown in 8a representatively.
0, and a relay 31 that is energized when this photocoupler is ON.

It has a diode 32 connected in parallel and in the opposite direction to the light emitting part of the photocoupler, and two dividing resistors 33 and 34, respectively.

Selection display circuit sa*sb...6n and connection control circuit M8
Each of the circuit elements constituting the circuit elements a, 8b, . . . , 8n is connected to a resistor 33. Hotokabu 230. The diode 22 and the selection switch 5a form a closed path for the selection signal, and the resistor 23.
Photocoupler 20. Diode 32. The resistor 34 and the call switch 7a form a closed circuit for a call signal.

Contacts 4m, 4b...4n are connected to the corresponding connection control circuit 8a
, llb... These are normally open contacts of the relays 31 provided at 8n. In this embodiment, each relay 31 is connected to the DC power supply 9 in series with the light receiving section of the photocoupler 30! However, it may be connected in series with the light receiving section of the photocoupler 30 to a separate power source.

This telephone device has a resistor 23 when the call switch 7a is pressed down. Photocoupler 20. Since the closed circuit including the guide 32 and the resistor 34 is closed and the photocoupler 20 is turned on, the lamp 21 of the 1 selection display circuit 6a lights up. When any of the other call switches 7b...7n is pressed down, the selection display circuits 6b...6n and the connection control circuits 8b...8n corresponding to the call switches 7b...7n are of the same type. A closed circuit for a calling signal formed by the circuit elements is closed and a lamp corresponding to the discharge switch is lit. Therefore, the staff member can confirm the call pre-order that should be made available based on the lighted lamp.

When the 1 selection switch 5m is closed, the closed circuit including the resistor 33, photocoupler 30, and diode 22 is closed and the photocoupler 30 is set to 0N-j, so the relay 31 in the connection control circuit 8a is energized, the contact 4a is closed, and 1 call is scheduled. The winding 2a is connected to the voice bus 3 to enable communication. Other selections Similarly, when the switches 5b...5n are closed, the call pre-winding corresponding to that switch becomes available for calls.

In the above embodiment, a relay and its contacts can be used instead of the photocouplers 20 and 30. Also, instead of directly connecting the lamp 21 when the photocoupler 20 is turned on, the fact that the photocoupler 20 is turned on is stored in the 7 lip-flop, and the stored signal turns on the switch element of the rung driver to energize. It's okay.

Similarly, instead of directly energizing the relay 31 using the photocoupler 230, the fact that the photocoupler 30 has been turned on is stored in the 7-lip frog, and the stored signal turns on the switch element in the relay's energizing circuit to energize it. As described above, the present invention provides a selection switch and a selection display circuit for each pre-winding call for one call, and a call switch and a connection control @route for each call pre-winding. A common voice vowel is provided for each call in advance! Connect to the telephone via I.

Each selection display circuit is individually connected to the corresponding connection control circuit via a control line, so you can make calls! l! The number of cables installed between the device and the pre-winding device is reduced, making the cost that much cheaper.

[Brief explanation of drawings]

The diagram shows the electric circuit of the communication device #1K.
FIG. 1: Call sharp device %2・, 2b...2n: Call advance winding, 3:
Audio bus, 48e4b/4n: Relay contact - S a
e S b...5n; Selection switch. 6a, 6b-an: selection display circuit, 7a. 7b...Tn: Call switch, 8s, ab...an
:*Connection control circuit, 9: DC power supply, 1ae101-Ion
: Control M, 11.12: Power line. Special #! f Applicant Nippon Signal Co., Ltd.

Claims (1)

[Scope of Claims] (1) The telephone main unit is provided with a selection switch and a selection display circuit corresponding to each telephone I [Ilb] and each telephone slave, and one telephone slave is equipped with a telephone slave, a call switch, and a selection display circuit. A connection control circuit is provided for each call. A communication device in which each overtalking device is connected to a communication device via a common voice bus, and each selection display circuit is individually connected to a corresponding connection control circuit via a control line. (3) The selection display circuit is configured such that the selection switch is closed or Ma2! The connection control circuit is a circuit that outputs a selection signal to the control line when a call signal is input from the control line, and displays a selection signal when a call signal is input from the control line. A circuit that outputs a calling signal to the control 11 when the calling switch is closed or opened, and when a selection signal is input from the control line, connects the corresponding overtalk slave to the voice bus line to enable text communication. Claim S that is
The communication device according to item 1. (8) The selection display circuit includes a resistor and a photocoupler,
The connection control circuit has two resistors, a photocoupler, a diode, and a relay, and one of the resistors in the connection control circuit and the photocube 2. Control line 1 The diode and selection switch in the selection display circuit constitute a closed circuit for the selection signal, and the resistance and photocoupler in the selection display circuit, the control line, and the connection control - diode in the path and the other resistance and call 8. The communication device according to claim 8, wherein a switch constitutes a closed circuit for a calling signal.