JPH0810892B2 - Multiple line connection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a connection device for connecting a telephone line,
In particular, the present invention relates to a multiple line connection device suitable for connecting a plurality of lines and exchanging information with a plurality of parties at the same time.

[Conventional technology]

As a form of simultaneous communication within a specific group distributed in a remote location, a television that aims to enable a conference equivalent to being in the same conference room between remote conference rooms by means of television images and audio. Conference equipment is being developed. This is for exchanging information with multiple partner stations using multiple telephone lines, but there are many elements that regulate the lines and terminals, and each element is further divided, so Elements are combined to increase the types of lines and terminals,
Communication control is complicated. At present, in order to send information such as voices, still images and electronic blackboards of the video conference system to the other party, telephone lines are allocated to the information such as voices, still images and electronic blackboards. This is handled by combining a network control unit that allows manual transmission and automatic reception on a unit basis, and a U-Dial device that can store the other party's telephone number, that is, the other party's telephone number, and make a one-touch line connection.

[Problems to be solved by the invention]

In such a conventional teleconferencing device, a network control unit and a eu-dial device are required for each line to be used, and the line connection and blocking operations are performed for each line. This is necessary, and since this operation is quite troublesome, it has the drawback that it can not be easily operated by novices including users. In addition, in the conventional network control unit, it is judged whether or not it is connected to the other party at the time of automatic transmission by checking whether or not the polarity of the line is reversed.However, some recent PBXs do not return the polarity inversion. On the other hand, there are some drawbacks such as automatic transmission being disabled. At the end of the conference, the user will forget to block the line by simply turning off the power to the device, or the line will remain in the hold state unless the line is blocked on the called side but on the calling side. There are also drawbacks such as becoming.

[Means for solving problems]

The present invention has been made in view of such problems,
A network control unit that connects and blocks the connected terminal and the line, and detects a received signal and a block command signal from the line that passes through this network control unit, and sends the received signal and the block command signal to the line. A control signal transmission / reception circuit is provided, a control panel having a connection destination information instruction button for instructing a connection partner and a connection line and a connection / blocking instruction instruction button, and a storage unit for storing connection destination information are provided. The line connection and line block in the network control unit are controlled according to the detection result of the transmission / reception circuit and the instruction from the control panel.

In addition, between the network control unit and the connected terminal, the network control unit and the connected terminal may be connected to each other after a predetermined time has elapsed after the detection of the received signal in the control signal transmission / reception circuit and before the end time of the detection of the blocking command signal. A switching device for connecting and closing the above is arranged.

[Action]

Therefore, according to the present invention, it is possible to control the line connection and line blocking operation in the network control unit according to the detection result in the control signal transmitting / receiving circuit and the instruction from the control panel.

Further, the connection and blocking of the network control unit and the connected terminal can be performed by using the switch.

The network control unit is generally built in a telephone or a network control unit for sending a modem signal through a telephone line. As a function, it performs connection control of the subscriber telephone switching network (starting and restoration of the central office switch, sending of selection signals, detection of calling signals, etc.).
In terms of operation, the call originates when the telephone's transmitter is lifted and is connected to the exchange through the telephone line. When you dial the telephone number of the other party, the exchange connects the line to the telephone of the other party and rings the bell. When the other party answers, you can start talking. When you hang up, put a transmitter and block the line. For ringing, you can talk to the other party by raising the transmitter after ringing the bell. Since a person intervenes at the telephone, it is possible to confirm the response of the other party when the other party comes out in the outgoing call operation, and it is possible to confirm by ringing the bell in the incoming call operation. When a person does not intervene, it is necessary to send a confirmation signal instead of performing an action for the person and to detect the confirmation signal on the transmitting side.

In the present invention, alternative signals and detections (confirmation of response of the other party, transmission of incoming call information, transmission and confirmation of line disconnection information) are performed.
For example, it is performed as follows.

[Calling operation]

Confirmation of the other party's response Other party's signal: Send the received signal. Confirmation of response: Detection of received signal from the other party. Line disconnection: Generates a block command signal. [Incoming call operation] Confirmation that the transmitter has been lifted (transmission of incoming call information): A reception completion signal is generated to the other party. Line disconnection: Generates a block command signal. [Embodiment] The multiple line connection device according to the present invention will be described in detail below. FIG. 1 is a block diagram showing an embodiment of this multiple line connection device. This multi-line connection device comprises terminals 11, 12, 13, 14 connected to four (not shown) lines and four network control units 2 connected corresponding to the respective terminals.
1, 22, 23, 24, four terminals 31, 32, 33, 34 connected to a conference terminal (not shown), and a control signal sent through the line are transmitted to the network control unit 21, 22, 23, A control signal transmission / reception circuit 4 that detects a signal via 24 and sends a control signal to this line, and a line connection / blocking control unit (hereinafter referred to as connection / blocking unit) that is connected to this transmission / reception circuit 4 and connects and blocks each line. The block control unit 5), the control panel 6 for instructing various commands, and the storage unit 7 for storing the telephone number of the connection destination. In addition, the network control unit 21,22,23,2
4 is a terminal 11, 12, 13, 14 under the control of the connection / blocking controller 5.
The connection and disconnection of the line with the other terminal device (not shown) is performed, and the connection and disconnection of the line with the conference terminal device (not shown) are performed via the terminals 31, 32, 33, 34.

FIG. 2 is a block diagram showing the control signal transmitting / receiving circuit 4.
The transmission / reception circuit 4 includes a control signal detection circuit 43, a control signal generation circuit 44, a switching circuit 45, and a line switching circuit 46. The switching circuit 45 is connected via the terminal 412.
The line switching circuit 46 is controlled by the switching signal supplied from the block control unit 5 to the control signal detection circuit 43 or the control signal generation circuit.
Select which of 44 to connect. Circuit switching circuit
46, via the terminals 421, 422, 423, 424, by the line switching signal from the connection / blocking control unit 5 given from the terminal 413,
The connection between the four lines and the switching circuit 45 is selected. In addition,
The terminals 421, 422, 423, 424 are connected to the conference terminal side of the network control units 21, 22, 23, 24, that is, the terminals 31, 32, 33, 34.
The control signal detection circuit 43 detects a received signal or a block command signal which is a control signal sent from the line, and sends the information to the connection / block control unit 5. The received signal and the block command signal are defined as a 2100 Hz sinusoidal signal lasting 5 seconds.

FIG. 3 is a block diagram showing the control signal detection circuit 43. This signal detection circuit 43 is a 2100 Hz bandpass filter 431.
And a CR integrator 432 that integrates its output and this CR integrator 4
It is composed of a comparator 433 which compares the output of 32 with a constant level, and detects the control signal of 2100 Hz.

Further, the control signal generation circuit 44 is composed of a 2100 Hz oscillator, and when the received signal or the block command signal is sent to a line (not shown), the switching signal of the connection / block control unit 5 and the line switching signal are respectively terminals 412. , 413, and is output to the selected line via the switching circuit 45 and the line switching circuit 46, respectively.

FIG. 4 is a configuration diagram showing the control panel 6.
This control panel 6 is a designated switch for connection
61, a connection line designating switch 62, a line connection command designating switch 63, a blocking command designating switch 64, and a telephone 65
And a telephone number storage designation switch 66 for designating a connection destination, a connection line, a connection / blocking command, a connection destination telephone number, and a storage instruction.

The connection / blocking control unit 5 is composed of a microprocessor, and controls the network control units 21, 22, 23, 24 and the control signal transmission / reception circuit 4 according to the command of the control panel 6 and the detection result of the control signal transmission / reception circuit 4. ,
Controls connection and blocking of multiple lines.

FIG. 5 shows a line connection / blocking sequence in the multiple line connection device configured as described above. Next, the operation will be described.

FIG. 5 (a) shows a call-out operation and a call-in operation for line connection. In the control panel 6, for example, the designated switch 61 of the connection partner is set to A, and the designated switch of the connection line is set.
When the lines 1, 2, and 3 not shown are designated by 62 and the line connection command designation switch 63 is pressed, the lines 1, 2,
The telephone number 3 is read out, and the connection / blocking control unit 5 sequentially activates the network control units 21, 22, and 23 to establish a line connection. That is, first, the connection / blocking controller 5 activates the network control unit 21, calls the line 1 of the partner device A, and connects the partner device A, the control signal transmitting / receiving circuit 4, and the terminal 31 via the line. The control signal transmission / reception circuit of the partner device A controls the control signal transmission / reception circuit upon confirming the incoming call,
Generate a received signal. On the other hand, the connection / blocking control unit 5 on the calling side switches the switching circuit 45 and the line switching circuit 46 of the control signal transmission / reception circuit 4 to connect the output of the network control unit 21 to the control signal detection circuit 43 and receive the signal. Wait for signal. When the control signal transmission / reception circuit 4 receives the received signal and the connection / blocking control unit 5 confirms it, the connection operation sequence of the network control unit 21 is completed after the elapse of the timer time of 10 seconds, and The connection is complete. Thereafter, the connection of the line 2 and the connection of the line 3 are sequentially performed by the same procedure, and the series of line connection operations on the calling side is completed. on the other hand,
On the called side, the connection / blocking control section constantly monitors for the presence of an incoming signal sent from each network control unit, and the line receiving the incoming signal is connected to the switching circuit of the control signal transmitting / receiving circuit and the line. Controls the switching circuit, sends the output of the control signal generation circuit for 5 seconds, sends the received signal to the calling side, and after 10 seconds the connection operation sequence with the terminal of the corresponding network control unit is completed, and the receiving side Line connection is completed. In this way, the connection between the calling side and the called side is completed.

FIG. 5 (b) shows a calling operation for line blocking. By pressing the closing instruction designating switch 64 on the control panel 6,
All connected lines are blocked. However, if the switch of the line desired to be blocked in the connection line designating switch 62 is pressed before the blockage command designating switch 64 is pressed, only the designated line is blocked. That is, when the connection / blocking control unit 5 receives the control signal of the block command from the control panel 6, the connection / blocking control unit 5 controls the switching circuit 45 and the line switching circuit 46 of the control signal transmitting / receiving circuit 4 to connect the connected line (for example, the line). The output (blocking command signal) of the control signal generating circuit 44 is sent to 1) via the terminal 11, and after 10 seconds, the network control unit 21 is controlled to complete the line blocking on the calling side and block the next line. Move on to.

FIG. 5 (c) shows an incoming call operation for line blocking. When the line connection is completed, the connection / blocking control unit 5 causes the line switching circuit 46 of the control signal transmitting / receiving circuit 4 to connect the connected lines to the control signal detecting circuit 43 periodically and sequentially. For example, now
When the block command signal is received via the network control unit 21, the network control unit 21 is controlled and the line is blocked 10 seconds after this. That is, after 10 seconds have passed since the control signal transmission / reception circuit 4 detected the block command signal passing through the network control unit 21 and the connection / block control section 5, the block was blocked. Needless to say, the corresponding line is similarly blocked even when the blocking command signal passing through the network control units 22, 23, 24 is detected.

In addition, when inputting a telephone number, the telephone number is keyed in by the telephone device 65 of the control panel 6, the connection destination information is input by the designation switch 61 of the connection partner and the designation switch 62 of the connection line, and stored by the storage designation switch 66. Part 7
To be stored.

FIG. 6 shows an embodiment in which the multiple line connection device shown in FIG. 1 is further improved. That is, in the multiple line connection device shown in FIG. 1, the received signal and the blocking command signal from the called side may act on the conference terminal side via the terminals 31, 32, 33, 34. However, if such a control signal is input to the conference terminal side, there is a fear that an obstacle such as howling or noise may be induced. The present embodiment has been devised in consideration of such a point, and the network control unit 21, 2
Switching device 81,82,83,84 between terminals 2,23,24 and terminals 31,32,33,34
Has been arranged. The switching devices 81, 82, 83, 84 of the respective lines are adapted to be connected and disconnected by a switching command from the connection / blocking control unit 5 via the control signal transmission / reception circuit 4, and the network control unit 21 It is in the disconnected state when the line is blocked using 22,22,23,24. That is, at this time, the connection between the network control units 21, 22, 23, 24 and the terminals 31, 32, 33, 34 is opened (closed). Then, the switch 81, 82,
The control signals 83 and 84 pass through the control signal transmission / reception circuit 4 10 seconds after the reception / acceptance signal from the line is detected by the control signal transmission / reception circuit 4 and 10 seconds after the reception completion signal is confirmed by the connection / blocking controller 5. Network control unit 21,2 by switching command
2,23,24 and terminals 31,32,33,34 can be switched to a connection mode for connection, and after the control signal transmission / reception circuit 4 detects a block command signal from the line,
At the same time that the block command signal is confirmed by the block controller 5, the switching mode is switched to the disconnection mode. Further, the switching devices 81, 82, 83, 84 are adapted to be switched to the connection mode 10 seconds after the control signal transmission / reception circuit 4 sends out the received signal, and the control signal transmission / reception circuit 4 sends the blocking command signal. At the same time as sending out, it switches to disconnection mode. In the figure, the same reference numerals as those in FIG. 1 indicate the same components, and the description thereof will be omitted.

Next, the operation of the thus configured multiple line connection device will be described with reference to the connection / blocking sequence diagram shown in FIG. That is, FIG. 7 (a) shows call-out operation and call-in operation of line connection, in which the designated switch 61 of the control panel 6 is set to A, and the line 1, 2, and 3 are designated by the designated switch 62 of the connected line. When the connection command switch 63 is pressed, the telephone numbers of the lines 1, 2, and 3 of the partner device A are read from the storage unit 7, and the connection / blocking control unit 5 sequentially activates the network control units 21, 22, and 23. , Line connection is made. That is, first, the connection / blocking control unit 5 activates the network control unit 21, calls the line 1 of the partner device A, and connects the partner device A, the control signal transmitting / receiving circuit 4, and the switch 81 via the line. . Upon confirming the incoming call, the control signal transmitting / receiving circuit of the partner device A controls the control signal transmitting / receiving circuit to generate a received signal. On the other hand, the connection / blocking control unit 5 on the calling side switches the switching circuit 45 and the line switching circuit 46 of the control signal transmission / reception circuit 4 to connect the output of the network control unit 21 to the control signal detection circuit 43 and receive the signal. Wait for signal. And
The received signal is detected by the control signal transmitting / receiving circuit 4,
When confirmed by the connection / blocking control unit 5, the switch 81 of the relevant line is switched from the disconnection mode to the connection mode after the elapse of the timer time of 10 seconds, and at the same time, the connection operation sequence of the network control unit 21 is completed. , Connection of line 1 is completed. Thereafter, the line 2 and the line 3 are connected in the same procedure as the line 1, and a series of line connecting operations on the calling side are completed. In other words, until 10 seconds have elapsed after the received signal was detected by the control signal transmission / reception circuit 4 and confirmed by the connection / blocking control unit 5, the network control unit 2
Since 1,22,23 and terminals 31,32,33 are blocked by switching devices 81,82,83, the received signal from the called side is not received by terminals 31,32,33.
The problem of being input to the conference side terminal via 33 does not occur. On the other hand, on the called side, the connection / blocking control unit checks whether there is an incoming signal sent from each network control unit, and the line that receives the incoming signal is connected to the line switching circuit of the control signal transmission / reception circuit. Control the switching circuit, output the output of the control signal generation circuit for 5 seconds to send the received signal to the calling side, and 10 seconds after sending the received signal, set the switch of the relevant line to the connection mode. At the same time, the connection operation sequence with the terminal of the corresponding network control unit is completed, and the line connection on the receiving side is completed. In this way,
The line connection between the calling side and the called side is completed.

FIG. 7 (b) shows the call operation of line blocking, and by pressing the block command designating switch 64 of the control panel 6,
All the lines connected by the network control unit are closed, and at the same time, all the switches are disconnected. However, if the switch of the line desired to be blocked in the connection line designating switch 62 is pressed before the blockage command designating switch 64 is pressed, only the designated line is blocked and the switch of that line is disconnected. That is, when the connection / blocking control unit 5 receives the control signal of the block command from the control panel 6, it controls the switching circuit 45 and the line switching circuit 46 of the control signal transmitting / receiving circuit 4 to connect the connected line (for example, At the same time as outputting the output (blocking command signal) of the control signal generating circuit 44 to the line 1) via the terminal 11, the switch 81 is set to the disconnection mode. Then, after a lapse of 10 seconds, the network control unit 21 is controlled to complete the line blocking, and the next line blocking process starts.

FIG. 7 (c) shows an incoming call operation of line blocking, and when the line connection is completed, the connection / blocking control unit 5 causes the line switching circuit 46 of the control signal transmitting / receiving circuit 4 to periodically switch the connected line. The sequential control signal detection circuit 43 is connected. For example, now
When the control signal of the block command is received via the network control unit 21, at the same time, the switch 81 of the line enters the disconnection mode, and 10 seconds after that, the network control unit 21 is controlled and the line is blocked. . That is, after the block command signal passing through the network control unit 21 is detected by the control signal transmission / reception circuit 4 and confirmed by the connection / block control unit 5, the network control unit 21 and the terminal 31 are immediately switched by the switch 81. Since it is blocked, the blocking command signal from the called side
The problem of being input to the conference side terminal via 31 does not occur. Of course, even when the blocking command signal passing through the network control units 22, 23, 24 is detected, the switching device is similarly operated.
It goes without saying that 82, 83, and 84 are in the disconnection mode and block the input of the block command signal to the conference side terminal.

In the present embodiment, the switching devices 81, 82, 83, 84 are set to the disconnection mode immediately after confirmation of the connection / blocking control unit 5 of the blocking command signal, but it is not always necessary to disconnect immediately. The corresponding switching device may be set to the disconnection mode before the time when the control signal transmitting / receiving circuit 4 of the blocking command signal disappears, that is, in the present embodiment, until 5 seconds have elapsed after the detection of the blocking command signal. By doing so, the influence on the conference side terminal can be eliminated to some extent. Further, the control signal transmission / reception circuit 4 for the block command signal
If the corresponding switch is set to the disconnection mode before the detection in (1), the influence of the blocking command signal on the conference side terminal can be completely eliminated. That is, if the switching trigger command is sent before the sending of the block command signal, the corresponding switch is disconnected before the block command signal is input to the conference side terminal based on the switch trigger command. It will be possible.

Further, in the present embodiment, the number of lines is set to 4, but 4
It goes without saying that it is not limited to.

〔The invention's effect〕

As described above, according to the multiple line connection device of the present invention, the line connection and line blocking operation in the network control unit is controlled according to the detection result in the control signal transmitting / receiving circuit and the instruction from the control panel. Line connections such as conference equipment can be made with a single touch, and automatic connection is possible even for PBXs that do not return polarity reversal, and there is no increase in line charges or line charges due to forgetting to disconnect the line.

In addition, between the network control unit and the connected terminal, the network control unit and the connected terminal may be connected to each other after a predetermined time has elapsed after the detection of the received signal in the control signal transmission / reception circuit and before the end time of the detection of the blocking command signal. Since the switch for connecting and blocking the above is arranged, it is possible to suppress the influence of the received signal and the blocking command signal on the conference side terminal.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a multiplex line connection device according to the present invention, FIG. 2 is a block diagram showing a control signal transmission / reception circuit used in this multiplex line connection device, and FIG. 3 is this control signal transmission / reception circuit. A configuration diagram showing a control signal detection circuit provided in
FIG. 4 is a block diagram showing a control panel, FIG. 5 is a diagram showing a line connection / blocking sequence in this multiple line connection device, and FIG. 6 is another embodiment of the multiple line connection device according to the present invention. FIG. 7 is a block diagram showing a line connection / blocking sequence in this multiple line connection device. 11,12,13,14 …… Line side input terminal, 21,22,23,24 …… Network control unit, 31,32,33,34 …… Conference terminal device side input / output terminal, 4 …… Control Signal transmission / reception circuit, 5 ... Line connection
Blocking control unit, 6 ... control panel, 7 ... storage unit, 81, 82, 83, 84 ... switching device.

Claims (2)

[Claims] 1. A network control unit for connecting and blocking a connected terminal to a line, a received signal and a blocking command signal from the line passing through the network control unit, and a received signal to the line. And a control signal transmission / reception circuit for transmitting a blocking command signal, a control panel having a connection destination information instruction button for instructing a connection partner and a connection line and a connection / blocking instruction instruction button, and a storage unit for storing connection destination information. And a control unit for controlling line connection and line blocking operation in the network control unit according to a detection result in the control signal transmitting / receiving circuit and an instruction from a control panel. 2. A network control unit for connecting and blocking a connected terminal to a line, a received signal and a block command signal from the line passing through the network control unit, and a received signal to the line. And a control signal transmission / reception circuit for transmitting a blocking command signal, a control panel having a connection destination information instruction button for instructing a connection partner and a connection line and a connection / blocking instruction instruction button, and a storage unit for storing connection destination information. A multi-line connection device comprising a control unit for controlling line connection and line blocking operation in the network control unit according to a detection result in the control signal transmitting / receiving circuit and an instruction from a control panel, A predetermined time has elapsed after the detection of the received signal in the control signal transmission / reception circuit, which is arranged between the connection terminal After that, the network control unit and the connected terminal are connected, and a switching device for blocking the network control unit and the connected terminal before the end point of detection of the blocking command signal in the control signal transmitting / receiving circuit is provided. A multi-line connection device characterized by being provided.