JPH05160921A - Communication control unit - Google Patents

Abstract

PURPOSE:To improve the operability of a communication equipment connecting plural lines by connecting/disconnecting another line synchronously to the connection/disconnection of one line among two or more lines. CONSTITUTION:A general line (a) is connected through a detection part 11a which inverts polarity and detects tone to the terminal C of a relay R1a and switched to the side of a relay R2a or a terminal equipment 3 by the relay R1a. Respective detecting signals from respective detection parts 11a, 12a and 13a and a switching signal from the terminal equipment 3 are inputted to a CPU 16a and based on those signals, the CPU 16a controls switching of the respective relays R1a and R2a. A line control circuit 1b executes the connection and disconnection of a general line (b) and the various kinds of detection, and switching to a relay R1b, etc., is controlled by the CPU 16a. Then, the line (b) is connected/disconnected synchronously with the connection/disconnection of the line (a). Therefore, the line (a) is utilized for audio signals, the line (b) is utilized for image signals, and the image line is controlled synchronously with the audio line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line control device, and more particularly to a line control device having a plurality of lines and a plurality of terminals for controlling mutual connection and disconnection.

[0002]

2. Description of the Related Art As a line control unit, there is conventionally a network control unit (NCU) having a switch function for switching a line to a telephone or another terminal, an incoming call detection function and the like. The line is connected or closed to each terminal through the NCU to make a call or exchange data.

[0003]

However, in the conventional line control, the main function is to connect or disconnect each line to each terminal, and each line has an independent position. For this reason, when trying to send and receive one related information group using a plurality of lines, a complicated procedure is required and it cannot be easily realized.

[0004]

The line control device according to the present invention is characterized in that connection and disconnection of another line is performed in synchronization with connection and disconnection of one line of two or more lines.
In one embodiment of the present invention, the one line is used for a voice signal and the other line is used for an image signal, and the image line is controlled in synchronization with the voice line.

[0005]

1 is a schematic block diagram showing a first embodiment of a line controller according to the present invention. In the figure, a general two-wire (2W) line a, a telephone set 2 and a terminal device 3 are connected to the line control circuit 1a, and the line is connected to the telephone set 2 side or the terminal device 3 by its switch function.
, And the telephone 2 is connected to the terminal device 3 side.
The line control circuit 1b has the same configuration as the line control circuit 1a, and is connected to the general line 1b and the terminal device 3, and is also connected to the line control circuit 1a.

In the line control circuit 1a, the general line a
Is connected to the C ₁ terminal of the relay R1a via the detection unit 11a that performs polarity inversion and tone detection, and is switched to the relay R2a side (A ₁ terminal) or the terminal device 3 side (B ₁ terminal) by the relay R1a. The A ₁ terminal of the relay R1a is connected to the A ₂ terminal of the relay R2a, and the B ₁ terminal is ON /
It is connected to the terminal device 3 via the off-hook detection unit 12a. The C ₂ terminal of the relay R2a is connected to the telephone set 2 via the on / off hook detection unit 13a, and the B ₂ terminal is 2
It is connected to the terminal device 3 via the line-to-four line conversion unit 14a. The telephone 2 is switched to the relay R1a side (A ₂ terminal) or the terminal device 3 side (B ₂ terminal) by the relay R2a. The 2-wire to 4-wire conversion unit 14a uses the audio input (AUDIO I
N) and voice output (AUDIO OUT) lines are connected, and voices from the telephone 2 are stored in the memory 35 (FIG. 2) on the terminal device 3 side through these lines to compose a mail, or the memory is stored. The voice data can be taken out from and output from the handset of the telephone set 2. The ringer 15a causes the telephone 2 to ring in accordance with the control signal from the CPU 16a. In addition, the CPU 16a includes each detection unit 1
Each detection signal from 1a, 12a and 13a is sent to the terminal device 3
Switching signals are input respectively from the
16a controls switching of the relays R1a and R2a. Further, the CPU 16a is also connected to the CPU 37 (FIG. 2) of the terminal device 3. As will be described later, the CPU 16a is set with priorities for the terminals, and the CPU 16a controls the relays R1a and R2a accordingly.

The line control circuit 1b is the line control circuit 1a.
Although it has the same configuration as the above, the telephone is not connected in this embodiment. Therefore, the line control circuit 1b in this embodiment performs connection and disconnection of the line b and various detections. The line b is a detection unit 11 that performs polarity inversion and tone detection.
The relay R1b is connected to the terminal device 3 via the on / off hook detection unit 12b. The relay R1b and the like of the line control circuit 1b are switching-controlled by the CPU 16a.

FIG. 2 is a schematic configuration diagram of a videophone device using this embodiment. The line control circuits 1a and 1b are as shown in FIG. In the terminal device 3, the transmission control unit 33 is connected to the B ₁ terminal of the relay R1a via the Line-a and the on / off hook detection unit 12a. The voice processing unit 34 is an audio input / output and two lines of the line control circuit 1a
It is connected to the B ₂ terminal of the relay R2a through the 4-wire conversion unit 14a. The memory 35 is for storing a mail or an answering machine. The keypad 36 is provided with keys for instructing dialing and other predetermined functions. The CPU 37 controls the operation of the terminal device 3 and is also connected to the CPU 16a of the line control circuit 1a.
The modem 32 is a line-b, on / off hook detection unit 12
b, the relay R1b, and the detection unit 11b, and is connected to the line b. The modem 32 encodes the image signal from the image processing unit 31 and decodes the image signal from the line b. Further, although not shown, the modem 32 has a transmission control unit and can transmit a dial code through Line-b. The image processing unit 31 compresses the image signal from the camera 4 and sends it to the modem 32, and expands the image signal from the modem 32 and sends it to the display 5.

3 to 7 are operation explanatory views of this embodiment in which the image line is controlled in synchronization with the telephone line. Figure 3
Is a flow chart of terminal transmission, and FIG. 4 is a flow chart of incoming call at the time of voice switching. In addition, in FIG. 5 to FIG. 7, the configuration of FIG. 2 is further simplified and shown, and the telephone set 2 is represented by a hand set. In the standby state where the handset is placed (state where the telephone 2 is not used), the relays R1a and R2a are in the normal state where the line is connected to the telephone 2. That is,
In the state of C ₁ -A ₁ connection and C ₂ -A ₂ respectively. Relay R1b is in this embodiment has a C ₁ -B ₁ connected to the normal state. Of course, it is also possible to connect a telephone to the line control circuit 1b and operate in the same manner as the line control circuit 1a (described later).

Terminal transmission will be described with reference to FIGS. 3 and 5. First, when the terminal device 3 is off-hooked by the keypad 36, that fact is detected by the on / off-hook detection unit 12, and the CPU 16a is notified of this (step 30).
1). Upon receiving the detection signal, the CPU 16a determines whether or not the terminal transmission prohibition state is set (step 302). Calling from a terminal is prohibited when the telephone is in use. "Using the telephone" means dialing, calling and talking during a call, and ringing and talking during a call. When the telephone is in use, the general line a is always connected to the telephone 2 in the normal state regardless of the terminal off-hook and the switching signal.

If terminal transmission is possible (N in step 302), the CPU 16a switches the relay R1a to the C ₁ -B ₁ connection state (step 303). As a result, the transmission control unit 33 of the terminal device 3 is connected to the line through the relay R1a. When dialing is performed from the keypad 36 in this state, the dial code is transmitted from the transmission control unit 33 through Line-a and Line-b (step 304,
FIG. 5A).

If the handset of the telephone 2 is picked up during or immediately after sending the dial code, it turns on / off.
CPU 16a detected by the off-hook detection unit 13a
Is notified (Y in step 305). When the RBT (ringback tone) is detected by the detection unit 11a (Y in step 306), the CPU 16a causes the relay R1a.
To C ₁ -A ₁ connection (step 307, FIG. 5).
(B)). Alternatively, when the RBT is detected by the detection unit 11a, the CPU 16a may switch the relay R1a to the C ₁ -A ₁ connection after an arbitrary time has elapsed after going off hook. When the handset of the telephone set 2 is off-hook after detecting the RBT or when the other party is off-hook (polarity inversion detection) after sending the dial code (Y in step 308), the CPU 16a at that time causes the relay R1a.
To C ₁ -A ₁ connection. Then, the telephone 2 is not on-hook (N in step 309), and the dual tone (DT) is not detected (N in step 310),
Telephone 2 is connected to line a and modem 32 is connected to line b
It is connected to and a voice and image call is made. When the call ends and the handset is placed (Y in step 309), an end signal is sent to the terminal side, and when DT is detected (Y in step 310), that is the on / off hook detection unit 13a. Is notified to the CPU 16a, and the lines a and b are closed (FIG. 5 (C)). In this way, the O of the line b for the image signal is subordinated to the line a of the telephone 2 side.
N / OFF is controlled.

Call reception at the time of voice switching will be described with reference to FIGS. 4 and 6. FIG. 4 shows an incoming call procedure at the time of voice switching. First, the keypad 3
When the mail creation function is selected from 6, the CPU 37 sends a switching signal to the CPU 16a of the line control circuit 1 (step 401 ON). In response to this, the CPU 16a
It is determined whether or not the audio switching is prohibited (step 4).
02). Audio switching is prohibited when the phone is in use. If not prohibited (N in step 402),
The CPU 16a confirms that the relay R1a is not connected to the C ₁ -B ₁ (N in step 403), and then the relay R 1
2a to switch to C ₂ -B ₂ connection (step 404).
As a result, the telephone 2 is relayed by R2a and Audio IN / OUT.
Through the audio processor 34 (FIG. 6 (A)).
In this state, a voice message is input from the telephone 2, the voice signal is stored in the memory 35 through the voice processing unit 34, and a mail is created. Further, in this state, the signal from the transmission control unit 33 cannot be accepted. Even if it is off-hook, the detection signal from the on / off-hook detection unit 12a is C
Even if input to the PU 16a, the priority of the transmission control unit 33 is lower than that of the telephone 2, so that the state of the circuit control circuit 1a does not change. Further, the CPU 37 stores the image processing unit 31 in the memory 3
5, the image signal from the camera 4 is stored in the memory 35, and the image signal is displayed on the display 5. That is, the mail can be created while checking the self-portrait.

When an incoming call is received from the general line while the voice is switched and the mail is created as described above, the detection unit 11a detects the polarity reversal and the detection signal is sent to the CPU 16a (Y in step 405). .. The CPU 16a operates the ringer 15a to notify the operator of the incoming call through the handset of the telephone 2 (step 406). When the operator who knows the incoming call operates the telephone 2 or the off-hook button of the keypad 36, the fact is detected by the on / off-hook detector 13a or 12a, and the CPU 16a is informed, and the CPU 16 informs the CPU 37 of that fact. .. Alternatively, the CPU 16a may be notified after informing the incoming call several times, and the CPU 16 may further notify the CPU 37 of that fact. This causes the CPU 16a to relay R2a.
To the A ₂ -C ₂ connection, the telephone 2 is connected to the line a to transmit and receive a voice signal, and the CPU 37 operates the image processing unit 31 and the modem 32 to receive the image signal received from the other side through the line b. Is displayed on the display 5 via the modem 32 and the image processing unit 31, and the camera 4
The image signal from is transmitted to the other party through the line b through the image processing unit 31, the modem 32 and the line control circuit 1b (step 407, FIG. 6B). Further, since the handset is not on-hook (N in step 408), DT (dual tone) is not detected (N in step 409), and no incoming call is detected (N in step 405) while the call is continued in this state. , The control of the CPU 16a is in a loop state. When the call ends and the handset is not on-hook (N in step 408) and the other handset is on-hook, the detection unit 11a causes the DT
Is detected, and the detection signal is transmitted to the CPU 16a,
Further, the CPU 16a notifies the CPU 37 to that effect (Y in step 409). The CPU 16a outputs the voice switching signal O
N / OFF is judged (step 410), and if it is ON, the CPU 37 is notified of that fact and the relay R
2a to switch to C ₂ -B ₂ connection (step 411).
The CPU 37 switches the image processing unit 31 and connects it to the memory 35 to enter the mail creation mode. When the handset is on-hook (Y in step 408), an end signal is sent to the terminal side (step 412), the lines a and b are closed, and the normal state is restored. In the normal state, since the line a is connected to the telephone 2 side, when the detection unit 11a detects an incoming call, the CPU 16a operates the ringer 15a, and the operator picks up the handset to make a normal call. Be seen. In this state, dialing and switching signals from the terminal side cannot be accepted, as will be described later.

FIG. 7 shows various modes of operation in the above embodiment. First, when the handset is off-hook, the relays R1a and R2a are in a state where the telephone 2 is connected to the line a. In this state, since the telephone has the highest priority, control signals such as dialing through Line-a from other terminals cannot be accepted ((A) in the figure), and switching signals from terminals are also accepted. Not possible (Fig. (B)).

When the handset is off-hook while dialing is being performed from the call-out control unit 33 of the terminal device 3 in the standby state, the fact is turned on / off-hook detection unit 1
3a informs the CPU 16a. The CPU 16a waits until the dialing is completed and switches the relay R1a from the C ₁ -B ₁ connection to the C ₁ -A ₁ connection, and connects the telephone 2 to the line a (for details, see steps 304-307 in FIG. 3). .. It is also possible to set the dialing from the terminal device 3 to be interrupted when the handset is off-hook by a dip switch (not shown) connected to the CPU 16a (FIG. 7C).

When dialing is performed from the call origination control unit 33 of the terminal device 3 in the standby state and the handset is not picked up as it is, the relay R1a is relayed by the C ₁
The line a is held while maintaining the -B ₁ connection state, and the line b for image signals is also held ((D) in the same figure). At this time, if you pick up the handset, you can make a normal call.

When the other party is busy by dialing, the telephone set 2 or the terminal unit 3 to which the line a is connected at that time is dialed.
A busy signal is sent to ((E) in the figure). Thereby, the operator puts the handset on and closes the line a, or the CP 37 is controlled by the CPU 37 under a certain condition.
U16a automatically hooks up and closes the line.

FIG. 8 is a schematic block diagram of an automobile telephone control system according to the second embodiment of the present invention. In the figure, the telephone control circuit 100 corresponds to the line control circuit 1a in FIG. That is, the CPU 101 corresponds to the CPU 16a of FIG. 1, and the relays R1 and R2 correspond to the relays R1a and R2a of FIG. 1, respectively. Terminal 102 connects to the car telephone and terminal 103 connects to the car telephone radio. Further, the terminal 104 is connected to the CPU on the terminal device side, and a control signal and a switching signal are input and output. The terminals 105 and 106 are connected to the transmission control unit of the terminal device through Line2 and Line3 and switched by the relay R3. The terminal 107 is connected to the audio processing unit of the terminal device via an audio IN / OUT line. As described above, the mobile phone is set to the highest priority and the operation is the same as the embodiment of FIG.

FIG. 9 is a schematic configuration diagram of an automobile videophone apparatus to which the above embodiment is applied. Here, two lines are used for transmitting and receiving a voice signal and an image signal, and telephone control circuits 100A and 100B are provided corresponding to each line,
The car phones 200A and 200B and the car phones 300A and 300B are connected to them, respectively. The telephone control circuits 100A and 100B are the line control circuit 1 of FIG.
a and 1b respectively. In any of the telephone control circuits, the automobile telephone is set to the highest priority, and the line control of the telephone control circuit 100B is performed in synchronization with the line control of the telephone control circuit 100A as described above.

FIG. 10 shows a calling sequence. Dialing is performed from the terminal device with the handset of the telephone set, and then the handset is taken to make a call. FIG. 11 shows an incoming call sequence. When an incoming call arrives, the terminal device goes off-hook, and the terminal device makes a call. For example, the mail stored in the memory 35 of the terminal device 3 is transmitted.

In each of the above embodiments, the case where the telephone and its function are set to the highest priority and the image line is controlled in synchronization with the voice line has been described, but the present invention is limited to voice and image. Not a thing. It can be applied to general line control devices that use two or more lines.

[0023]

As described above in detail, the line controller according to the present invention is related by connecting and disconnecting one line of two or more lines in synchronization with the connection and disconnection of the other line. The information group can be transmitted and received by a simple procedure.

[Brief description of drawings]

FIG. 1 is a schematic block configuration diagram showing a first embodiment of a line control device according to the present invention.

FIG. 2 is a schematic configuration diagram of a telephone device using this embodiment.

FIG. 3 is a flowchart of terminal transmission at the time of voice switching in the present embodiment.

FIG. 4 is a flowchart of an incoming call at the time of voice switching according to the present embodiment.

FIG. 5 is an operation explanatory diagram of the present embodiment in which the telephone is set to the highest priority.

FIG. 6 is an operation explanatory diagram of the present embodiment in which the telephone is set to the highest priority.

FIG. 7 is an operation explanatory diagram of the present embodiment in which the telephone is set to the highest priority.

FIG. 8 is a schematic configuration diagram of a car telephone control device according to a second embodiment of the present invention.

FIG. 9 is a schematic configuration diagram of a car telephone device to which the above embodiment is applied.

FIG. 10 is a calling sequence diagram in the above embodiment.

FIG. 11 is an incoming call sequence diagram in the above embodiment.

[Explanation of symbols]

 1 line control circuit 2 telephone 3 terminal device 15 ringer 16 CPU R1 relay R2 relay

Claims (3)

[Claims] 1. A line controller connected to two or more lines and two or more terminals and controlling mutual connection and disconnection, wherein another line is synchronized with connection and disconnection of one of the lines. A line control device for connecting and disconnecting a line. 2. The one line is a line for voice signals,
2. The line control device according to claim 1, wherein the other line is a line for image signals. 3. The line control device according to claim 1, wherein one of the terminals is a telephone terminal, and the one line is related to the telephone terminal.