JP2000184074A - Speaking board of parallel operation type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a line from becoming impossible to use though a single trunk is broken by providing plural trunks on the same line and providing a communication line and an information line for controlling a seat interval to be capable of parallel operation. SOLUTION: Active data are exchanged with each other between the different seats of the trunk 1, operation becomes cooperative. Then, in spite of generating the fault of a communication line or an information line 9 of seat interval control, the trunk 1 itself is provided with a detecting function in the state of the line to make it possible to operate singly. Namely, when a link is formed at the time point of calling at a common power line, a calling seat executes the calling operation of a normal common power line, the other seat displays presently using of the line and the trunk 1 releases the line 10 to avoid influence by a signal. Calling operation is finished with answering of an opposite side and though the other seats still display presently using of the line, the inhibition of line acquirement is released to make line acquirement possible. Power feeding when the trunk 1 line-acquired, is assignment of individual trunks 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a plurality of trunks on the same line to improve the reliability of communication equipment such as a call desk and a command desk.

[0002]

2. Description of the Related Art Conventional communication equipment such as a call terminal and a command line is
To improve reliability, a plurality of power supply units, traffic lights, connection circuits, and operator circuits were provided, but only one trunk was provided on the same line.

[0003]

In the conventional communication equipment such as a telephone terminal and a command terminal, if one trunk fails, the line becomes unusable. Also avoid the line becoming unusable.

[0004]

According to the present invention, a plurality of trunks are provided on the same line, and a communication line or an information line is provided for control between seats so that parallel operation can be performed.

[0005] Even if a failure occurs in the communication line or the information line of the inter-seat control, the trunk itself is provided with a line state detecting function so that it can operate independently.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention operates cooperatively by exchanging operation state data between different seats of a trunk.

The data exchange in the operating state is performed by connecting the control circuits of the seats by a communication line or an information line (FIG. 1) or
A method of connecting trunks of the same line with a communication line or an information line (FIG. 2), a method of connecting a control circuit of a seat and a trunk of another seat with a communication line or an information line (FIG. 3), or a method of using both of them There is.

[0008] The auxiliary traffic light (6) is a 400 Hz ringing traffic light or the like.

The traffic light (7) is a 16 Hz ringing bell traffic light.

When the data exchange of the operating state between the seats is functioning normally (hereinafter referred to as a link), there is no problem because it is in a cooperative state, but when there is no link, the line state is changed to individual seats. Need to detect and know directly from the trunk.

When the link is not established, an automatic line is used by the line voltage detecting circuit (32) when the operating status of the other seat, that is, when the voltage between the lines is low, the other seat is using this line. The display inside is displayed on a line button or the like.

In the tone dial system, a DTMF signal detection circuit (33) is provided to detect whether another seat is dialing. In the pulse dial system, a line voltage detection circuit (32) determines whether another seat is dialing. Is detected.

During dialing, control is performed to prohibit the capture of a line.

When the other seat finishes sending out the dial, the line capture is prohibited to enable the line capture.

As shown in FIG. 6, when the standby link of the common line is not established, the individual trunks share power supply by the communication current supply circuit (47).

During the link, one of the trunks represents
There is a method of supplying the call current or sharing each trunk.

When the link is established at the time of calling on the common line, the calling seat performs the normal calling operation of the common line, the other seats display that the line is in use, and Open the line so that it is not affected by the signal.

The calling operation is terminated in response to the other party's response, and while the other seat remains displaying that the line is being used, the line capture is prohibited and the line capture is enabled.

If a plurality of trunks seize a line, the power supply is shared between the individual trunks.

When the user of the line disappears, the display indicating that the line is in use is erased.

When the link is not established at the time of calling on the common line, the calling seat performs the normal calling operation of the common line, and the other seat has a signal detection circuit (41) connected to the line. A circuit other than the signal detection circuit (41) is opened by a relay (45) so that the line is not affected.

If a call is made at the same time, a signal collision is detected by the current detection circuit (43), and the call collision is notified to the operator by a buzzer and a lamp.

At the other seat, the signal detection circuit (4
When the detection is made in 1), the relay (45) is closed, the power supply circuit is connected, and when a line loop is detected by the current detection circuit (46), an indication that the line is in use is displayed.

When the loop is released, the display indicating that the line is in use is erased.

In the case of a common line, an incoming call is received at the other party's loop.
Since the power supply is shared between the individual trunks, it is possible to perform line seizure even when a link is established and a link is not established at each seat.

If the link is established and another seat is using the line and the own seat is not using the line, the relay (45)
So that the line is not affected.

If the link is not taken, the voltage of the DL is monitored by the voltage detection circuit (54) in the 4-wire line as shown in FIG. 8, and if the DL voltage is low, another seat is using this line. Then, the display indicating that the line is being used is displayed on the line button or the like.

When the characteristic impedance of the line is 600Ω, the terminating resistor (52) is set to about 800Ω, which is higher than the characteristic impedance of the line, and the characteristic impedance of the line is set even when the terminating resistor (52) is connected in parallel. Choose a value that is slightly lower than

When the line is being used at another seat, the terminating resistor is disconnected by the terminating resistor disconnecting relay (51).

When a call is made simultaneously while the link is not established in the magnet line, a signal collision is detected by the current detection circuit (43), and the call collision is notified to the operator by a buzzer and a lamp.

[0031]

According to the present invention, the possibility that the line becomes unusable due to the failure of the trunk of the communication terminal or the command terminal is reduced.

At the time of maintenance, even if the power is turned off for each seat system, there is little effect on the system at the other seat, so that repair and maintenance can be performed with the power turned off.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

FIG. 3 is a block diagram showing a third embodiment of the present invention.

FIG. 4 is a block diagram showing an example of a conventional call desk and command desk.

FIG. 5 is a block diagram showing an embodiment of an automatic line.

FIG. 6 is a block diagram illustrating an embodiment of a shared power line.

FIG. 7 is a block diagram illustrating an embodiment of a magnet line.

FIG. 8 is a block diagram illustrating an embodiment of a 4-wire circuit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 trunk 2 connection circuit 3 handler circuit 4 handset 5 control circuit 6 auxiliary signal 7 signal 8 power supply 9 communication line or information line 10 line 11 power supply coupling diode 12 auxiliary signal switching relay 13 signal switching relay 14 outside line 30 relay REFERENCE SIGNS LIST 31 signal detection circuit 32 line voltage detection circuit 33 DTMF signal detection circuit 40 relay 41 signal detection circuit 42 sneak-prevention diode 43 current detection circuit 44 signal transmission circuit 45 relay 46 current detection circuit 47 call current supply circuit 50 relay 51 terminating resistor disconnection Relay 52 Termination resistor 53 Incoming detection circuit 54 Voltage detection circuit 55 Diversion prevention diode

Claims (6)

[Claims] 1. Communication equipment such as a call desk and a command desk having a plurality of trunks on the same line. 2. A communication line or an information line is provided between seats for performing a parallel operation. 3. A communication line or an information line is provided between trunks for performing parallel operation. 4. A communication line or an information line is provided between a control circuit at a seat and a trunk at another seat to perform parallel operation. 5. A function for detecting a line state is added to a trunk for performing a parallel operation. 6. The means of claim 2, the means of claim 3, the means of claim 4, and the means of claim 5 are used in combination for performing parallel operations.