JPS6249755A - Auto-resetting method for conference room connecting device - Google Patents

Abstract

PURPOSE:To automatically cut off a telephone-conference system from a communication circuit, by always monitoring sound signals and, when it is detected that sound signals continue a condition which is lower than a certain reference level for more than a fixed time, automatically resetting a circuit connection. CONSTITUTION:Received sound signals inputted through a terminal RIN are mixed at a mixing section 48 after passing through a transformer 40 and receiving amplifier 41 and sent to a voice bus (V-bus). Part of the sound signals are branched at the point A of the output of the amplifier 41 and supplied to an auto-resetting circuit. The auto-resetting circuit is composed of a comparator 49 and a timer 50. The sound signals supplied to the auto-resetting circuit are checked about their levels whether or not the levels are lower than a certain reference level at the comparator 49 and, when their levels are lower, the timer 50 is stated. When a certain time T has passed, the timer 50 transmits a reset signal to a microprocessor 20 and the circuit connection is released by restoring a corresponding switch in a line interface 29.

Description

[Detailed Description of the Invention] [Summary] An auto-reset circuit is added to the conference room connection device of the teleconference system, and when the audio signal remains silent for a certain reference time or more, the teleconference system is automatically removed from the communication line. do.

[Industrial application field]

The present invention relates to a method for automatically resetting the line holding state of a conference room connection device used for a telephone conference.

Conventional teleconferencing has the disadvantage that the teleconferencing device is sometimes left using the telephone line even after the conference has ended, making the telephone line unavailable to general subscribers. This improvement was strongly required.

[Conventional technology]

FIG. 2 shows an example of a conventional telephone conference system system diagram.

In the figure, 1 is a conference connection device, 2.3.6.9 and 12 are communication devices such as PBX, 4.7.10 and 13 are voice control devices, respectively, and 5.8.11 and 14 are The conference room selection units 15, 16, 17, and 18 are communication lines, respectively.

As can be seen from the telephone conference system system diagram in FIG. 2, a voice control device 4 is connected to the conference connection device 1 via a communication line 15, and a communication device 3 such as a PBX and a conference room selection device are connected to the voice control device 4. Unit 5 is connected. Similarly, voice control device 7.10.1 via communication lineman 6, F, I8
3 is connected.

In the above example, four communication lines are connected, but in general, a plurality of communication lines are connected.

The audio control devices 4.7.10 and 13 are devices that perform ink face communication with the line, control transmission/reception of audio signals, amplification, etc., and are connected to conference speakers, microphones, and the like. Speakers, microphones, etc. are omitted from the top view.

The conference room selection units 5.8.11 and 14 are devices containing a built-in operation section and remote control device for connecting the line of the other party.

The conference connection device 1 is installed at a central office in the network,
This is a device that controls the entire teleconferencing system.

In addition, when the telephone conference system is used in FIG. 2, each switch schematically drawn on the voice control device 4, 7, 10, 13 and the friend conference connection device 1 is located at the contact position indicated by the dotted line. and the teleconference device connects the communication line 15.
16, 17, and 18, and a telephone conference can be held.

On the other hand, when the conference call system is not used, each of the switches assumes the contact position shown by the solid line, so that the communication devices 2.3.6.9 and 12 such as PBX are connected to the communication line 15.16.1.
7 and 18 can now be used.

FIG. 3 shows an example of a block diagram of a conventional conference connection device.

In the figure, 20 is a microprocessor, 21, 22, and 24 are buffers, 23 is a warning signal generator, 25, 27 is a changeover switch board, 26, 28 is a remote control controller, 29
is a line ink face, and 30 is a terminal board.

For simplicity, the conventional conference connection device 1 shown in FIG. 3 is an example in which two communication lines are connected.

The communication line goes through the terminal board 30 and connects to the line ink face 29.
Enter.

As described above, the line interface 29 has a switch function for switching input/output communication lines between those for teleconference use and general use, and is controlled by changeover switch panels 25 and 27. The line ink face 29 also has a function of separating control signals and audio signals sent from the other party, and transmits and receives control signals to and from the remote control controllers 26 and 28.

The remote control controllers 26 and 28 transmit and receive control signals, and are connected to the input/output bus (floBUS) from the microprocessor 20.
A built-in modulator modulates the control signal (in pulse format) sent via the line ink face 29 into an audio frequency signal and sends it to the other party via the line ink face 29. Also, the audio frequency control signal is demodulated and returned to pulse form and sent to the microprocessor 20 via the input/output bus.

The microprocessor 20 is a part that controls the entire system.

The control commands sent from the microprocessor 20 to the changeover switchboard 25.27 are first sent to the buffer 21, and the control commands to the changeover switchboard 25 are further sent via the buffer 24. A control command sent to the changeover switchboard 25 and to the changeover switchboard 27 is further sent to the changeover switchboard 27 via the buffer 22.

The advance notice signal generator 23 is a part that generates a notice signal to general subscribers at the start of use of the telephone conference, and the notice signal is sent to the communication line via the remote control controllers 26 and 28.

The audio signal passes through the line ink face 29 and enters the changeover switch board 25.27, where audio mixing is performed and then enters the audio bus (V-BUS).

The audio signal entering the audio bus (V-BUS) is sent to the other party via the changeover switch board 25, 27 and the line ink face 29.

As can be seen from the above description, the conference connection device 1 transmits and receives control signals to and from each of the conference room selection units 5.8.11 and 14 to control the entire system, and finally the conference room selection unit 5.8. .11 and 14 are received to reset the line connection.

[Problem that the invention seeks to solve]

However, in actual operation, people who participated in a conference may, for example, turn off the power to the corresponding audio control device 4 without pressing the end key provided on the conference room selection unit 5 because of the sense of relief at the end of the conference. This often happens.

In such a case, the conference room selection unit 5 does not transmit the termination code, so the conference connection device 1 transmits the termination code.
As a result, the connection of the line 15 remains unchanged and the conference status continues to be maintained.

For this reason, even though the conference call ended, line 15
The disadvantage was that it was not available to general subscribers.

[Means for solving problems]

As shown in FIG. 1, the conference room connection device of the teleconference system is provided with a comparator 49 that outputs an output signal when the received audio signal level is below a certain reference level, and a timing device 50. The clock device 5 measures the time during which the output signal is output.
0, and the measured time is longer than a certain reference time'm
This automatically disconnects the teleconference system from the communication line.

[Effect]

The conference connection device according to the present invention constantly monitors the audio signal and automatically resets the line connection when it detects that the audio signal has remained below a certain reference level for a certain period of time, so there is no need to press the end key. However, there is an effect that the problems that occur with conventional devices do not occur.

〔Example〕

FIG. 1 is a block diagram of an embodiment of a changeover switchboard according to the present invention.

In the figure, 40, 42 is a transformer, 41 is a receiving amplifier, 43 is a transmitting amplifier, 44a, 44b, etc. are analog switches, 45a, 45b, etc. are amplifiers, 46a, 46b, etc. are resistors, 47 is a decoder, 48 is a mixing section, 49 is a comparator, and 50 is a timing device.

According to the present invention, a comparator 49 and a timing device 50 are newly added to the conventional changeover switch board circuit.

As explained in the section of the prior art, one changeover switch board is used for each communication line, and mixing of the lines is performed. The received audio signal input from terminal RIM is transferred to transformer 4.
0, the signal passes through the reception amplifier 41, is mixed by the mixing section 48, and enters the audio bus (V-BUS), but in the present invention, it branches at point A of the output of the reception amplifier 41 and enters the autorecent circuit.

The auto-reset circuit is composed of a comparator 49 and a timing device 50. The audio signal input to the auto-reset circuit is first checked by a comparator 49 to see if it is smaller than a certain reference level L.

If it is smaller than the reference level L, the comparator 49 determines that there is no sound and outputs an output signal. The clock device 50 is started by this output signal.

The clock device 50 counts the time, and when the clock value exceeds a predetermined set value, that is, exceeds a certain time T, the clock device 50 sends a reset signal to the microprocessor 20, and the microprocessor 20 issues a reset signal to the microprocessor 20. When the reset signal is confirmed, a signal is issued to clear the address signal of the switch, the corresponding switch in the line ink face 29 is restored, and the line connection is released.

If the measured value is less than a predetermined set value, the comparator 4
When the output signal of 9 disappears, the clock device 50 is immediately cleared.

Note that the clock device 50 is set by the microprocessor 20.

〔Effect of the invention〕

As described in detail above, the present invention has the great effect that the auto-reset circuit automatically confirms the end of the conference call and removes the conference call device from the communication line.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a changeover switchboard according to the present invention. FIG. 2 shows an example of a conventional telephone conference system system diagram. FIG. 3 shows an example of a block diagram of a conventional conference connection device. In the figure, ■ is a conference connection device, 2.3.6.9 and 12 are communication devices such as PBX, 4.7.10 and 13 are audio control devices, respectively, and 5.8.11 and 14 are Conference room selection units, 15, 16, 17, and 18 communication lines, 20 microprocessors, 21, 22, 24
are buffers, 23 is a warning signal generator, 25.27 is a changeover switch board, 26.28 is a remote control controller, 29
is a line interface, 30 is a terminal board, 40.42 is a transformer, 41 is a receiving amplifier, 43 is a transmitting amplifier, 44
a, 44b, etc. are analog switches, 45a, 45b
46a, 46b, etc. are resistors, 47 is a decoder, 48 is a mixing section, 49 is a comparator, and 50 is a timing device. leather 1 ward

Claims (1)

[Scope of Claims] A conference room connection device of a telephone conference system is provided with a comparator (49) that outputs an output signal when the received audio signal level is below a certain reference level, and a timing device (50), The time during which the output signal of the comparator (49) is output is measured by the timing device (50), and when the measured time continues for a certain reference time or more, the teleconference system is automatically disconnected from the communication line. An auto-reset method for a conference room connection device characterized by separating the device.