JPS61218294A - Connecting system for inter-key telephone sets - Google Patents

Abstract

PURPOSE:To enable an extension call between by telephone sets by connecting a key telephone set with a transfer line when an extension number is received from other main set through the transfer line and the key telephone set for the extension number is not in a call state. CONSTITUTION:With the emitting of ringing sound from a speaker 13b and with the raising of the handset of a key telephone set B-2, a hook switch HSb is closed and a telephone set control circuit 10b sends out an off-hook data to the main set B-1. With receiving the off-hook data, a central control circuit 4b sends out a TB relay releasing data to the key telephone set B-2. With receiving the TB relay releasing data, the telephone set control circuit 10b restores a TB relay 14b and closes the connecting point tb to the side of a talking circuit network 11b and the talking circuit network 11a of a key telephone set A-2 and the talking circuit network 11b of a key telephone set B-22 are connected through the main set A-1, a transfer line Ta and the main set B-1 and the extension call is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for connecting a plurality of button telephone devices.

[Conventional technology]

The button telephone device consists of one main device and a plurality of key telephones, and can be shared by the plurality of key telephones having a plurality of central office lines, and extension calls between these key telephones are also possible. And the central office line that answered the incoming call with a certain button telephone in the button telephone device.

It can also be transferred to other key telephones within the methane telephone device.

By the way, for example, as business expands, there may be cases where it is desired to install two or more of this type of button telephone devices in order to increase the number of telephones.

[Problem that the invention seeks to solve]

In such a case, since each key telephone device is independent, it is necessary to communicate through a single office line in order to communicate between the key telephone devices of these different key telephone devices.

[Means and effects for solving the problem] The button telephone device connection system according to the present invention has at least two button telephone devices, and connects the main devices of each button telephone device via a transfer line. , each button telephone has a selection button for capturing the transfer line and a display lamp for displaying the call status of the transfer line, and each main device can communicate with other main devices via the transfer line. means for sending an extension number corresponding to a key telephone connected to the key telephone for calling the key telephone; and when receiving the extension number sent from another main device via the transfer line, the extension number; means for connecting the key telephone and the transfer line when the key telephone corresponding to the above is in a non-calling state, between the key telephone devices.

It is characterized by the ability to make extension calls.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. Referring to the drawings, two illustrated embodiments include two button telephone devices A.
The main devices A-1 and B-1 from O to Bo are connected to each other by transfer lines Ta+Tb. Since the key telephone devices Ao and Bo have exactly the same configuration, the structure of the key telephone device Ao will be explained below.

The button telephone device Ao consists of one main device A-1 and a plurality of button telephones (however, only the button telephone A-2 is shown in the second drawing). It is connected by a communication line La and a data line Da. The main device A-1 is connected to a plurality of station lines (however, only one station line Ka is shown in one drawing). The office line Ka is connected to a crosspoint switch 7a via an A relay contact Xi that constitutes a DC circuit during two-office line communication and a office line incoming call reception and dial sending circuit 6a. Although other office lines are not shown, they are similarly connected to the crosspoint switch 7a via the office line incoming call reception and dial sending circuits.

The telephone line La of the button telephone A-2 is connected to the cross point switch 7a via a single telephone current supply circuit. Although not shown, the communication lines of the other key telephones are similarly connected to the crosspoint switch 7a via the communication current supply circuit.

The transfer line Ta passes through the dial sending circuit 3a.

It is connected to the cross point switch 7a.

The transfer line Tb is connected to the cross point switch 7a via a single call current supply circuit. Further, the transfer line Tb is connected to the central control circuit 4a via a photocoupler PHa, and is also connected to the central control circuit 4a via a PB receiver circuit 18a.

The central control circuit 4a receives incoming call detection data from the 1-station line incoming call receiving and dialing circuit 6a or the control button of the dialing circuit sent from the telephone A-2 via the data line Dar and the data transmitting/receiving and power supply circuit 5a. control and cross control for receiving various data, dial signals from the photocoupler PHa, and dial data from the PB receiver circuit 18a, receiving incoming calls on two-station lines, and sending dial signals to the dial sending circuit 6a and the dial sending circuit 3a. It controls opening and closing of the point switch 7&, and also transmits various data to the button telephone A-2 via the data transmission/reception and power supply circuit 5a and the data line Da.

In button telephone A-2, 1 call line La is TB 17
When the relay 14a is restored, contact tb and hook switch H
It is tangentially connected to the communication network 11a via 8a.

In the operating state of the TB IJ relay 14a, it is connected to the speaker 13a via the contact tb and the antenna f12a. The telephone control circuit 10a transmits and receives data to and from the main device A-1 via the power supply circuit 8a and the data line Da, and detects a key-in from the lamp/key circuit 9a. It controls the flashing of the lamp and controls the activation of the first ring tone circuit 15a.

In addition, the lamp/key circuit 9a has 1 normal selection button,
In addition to the station line display lamp, etc., there are additional selection buttons for extension line transfer and station line transfer, and display lamps for extension line transfer and station line status.

Next, the operation of the present invention will be explained.

First of all? Button telephone device A-2 of button telephone device AO pg
The operation when calling the button telephone B-2 of the button telephone device BO to make an extension call will be described.

In button telephone A-2, when the selection button for extension transfer is pressed and the handset is raised, hook switch HSa is closed and telephone control circuit 10a is transferred to main device A-1.
Sends selection button press data and off-hook data for extension transfer to. In the main device A-1, the central control circuit 4a:
When these data are received, the transfer line capture relay Aa for the extension transfer is operated to close its contact a1 and capture the transfer line Ta, and the transfer line Ta of the cross point switch 7a and the button telephone A are activated. -2 communication line L
Close the contact with a and send the display rung data for extension transfer to all key telephones. This is so funny.

Transfer line Ta is captured. Further, when receiving the extension transfer display lamp data, the telephone control circuits 10a of all the telephones of the button telephone device AO light up the lamps of the transfer lines Ta.

Next, a predetermined dial number is dialed to select whether to acquire the central line or the extension of the button telephone device Bo.

When the central control circuit 4a receives the dial, it transmits the dial sending circuit 3a or the PB signal sending circuit 1'ia
x, 9 transfer line Ta dial/e Luz or i, PB
Send double signal.

Dial to transfer line Ta) J? Luz and Sulu, PB
Whether the signal is to be used is determined in advance by the central control circuit.

In the main device B-1 of the button telephone device Bo, the central control circuit 4b transmits the signal via the transfer line Ta to the photocoupler PHb in the case of a dial signal, and to the photocoupler PHb in the case of the received PR multiplied signal.
When the R receiver circuit 18b receives the call, it connects the loss point to determine whether the dial number is an extension call or a single station call, and notifies the button telephone A-2 that an extension call is possible. The extension connects the cross point of the mission 21b to notify the button telephone A-2 that the extension cannot be used.

If it is possible to make an extension call, use the primary key telephone A-2,
Which button telephone device B do you want to call? Dial the extension number of telephone B-2. When the central control circuit 4a receives this dial, it sends the dial to the dial sending circuit 3a or PR.
The signal sending circuit 17a sends out a dial pulse or a PB double signal to the transfer line Ta. Should the dial to the transfer line Ta be a pulse?

Whether to send the PB double signal is set in advance in the central control circuit.

In the main device B-1 of the button telephone device Bo, when the central control circuit 4b receives the dial pulse or the PB double signal via the transfer line Ta by the photocoupler PHb or the PB receiver circuit 18b, the central control circuit 4b activates the button corresponding to the extension number. It is determined whether telephone B-2 is busy or not.

If the call is not busy, the central control circuit 4b sends the TBIJ relay activation data to the key telephone B-2 and the incoming call telephone A.
A ring pack tone is sent to the telephone communication network 11a of -2. On the other hand, the telephone control circuit 10b of the button telephone B-2
When receives the 1TB17 ray activation data, TB! When the J-ray 14b is operated and its contact tb is closed to the F12B side, the 1st ringtone activation data is received and the 1st ringtone circuit 15 is activated.
b is activated, and an incoming signal tone is emitted from the speaker 13b via the amplifier 12b. Furthermore, when switching from a signal call to a voice call, the button telephone A-2 dials a predetermined dial number, and the central control circuit 4b receives the dial data and sets a cross point in the same way as when dialing an extension number. Switch T''L disconnects the cross point between the transfer line ← of chia b and the ring pack tone circuit 19b, connects the cross point with the talk line Lb of key telephone B-2, and sends a ring tone to key telephone B-2. Sends the release data and stops the ring tone.This causes the communication network 11 of the button telephone A-2 to
m is the main device A-1. It is connected to the speaker 13b of the button telephone B-2 via the transfer line Ta and the main device B-1, and a calling voice is emitted from the speaker 13b.

In this state, when the handset of key telephone B-2 is raised, hook switch H8b closes and telephone control circuit 10b sends off-hook data to main device B-1. The central control circuit 4b is.

When off-hook data is received, TB relay release data is sent to key telephone B-2. Button telephone B-2
When the telephone control circuit 10b receives the ITBIJ relay release data, it restores the TBIJ relay 14b and closes its contact t.
b to the communication circuit network 11b side.

As a result, the communication circuit network 11a of the titanium telephone A-2 and the communication circuit network 11b of the button telephone B-2 are connected to the main device A.
-1. connected via the transfer line Ta and the main device B-1,
[Effects of the Invention] As is clear from the above explanation, according to the present invention.

Extension calls can be made between key telephone devices. Also, one car? Even if the capacity of the button telephone device is small, since it is possible to connect multiple button telephone devices, it has become possible to share many button telephones.

[Brief explanation of drawings]

The figure is a block circuit diagram showing the configuration of an embodiment of a connection system between key telephone devices according to the present invention. A-1, B-1... Main device, A-2, B-2... Key telephone, Ta * Tb... Transfer line r PHa
r PHb...Photocoupler, 4at4b...Central control circuit, 3a.

Claims (1)

[Claims] 1. It has at least two telephone devices, the main devices of each button telephone device are connected via a transfer line, and each button telephone device has a selection button for capturing the transfer line and a call button on the transfer line. and a display lamp for displaying the status, and means for each main device to send an extension number corresponding to the key telephone connected to the other main device via the transfer line for calling the key telephone. and when receiving the extension number sent from another main device via the transfer line,
A connection method between key telephone devices, comprising means for connecting the key telephone corresponding to the extension number to the transfer line when the key telephone corresponding to the extension number is in a non-calling state.