JP2618436B2 - Communication device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication apparatus, particularly to a communication apparatus including an exchange and an extension terminal connected to the exchange.

[Prior Art] Conventionally, a key telephone system (hereinafter abbreviated as KTS) is known as a small private branch exchange system. In this KTS, in many cases, a dedicated telephone (button) having a main unit connected to a line network via a plurality of lines and a plurality of connection control keys and hold keys connected to the main unit via a telephone line and a control line. Phone).
The KTS can connect a line to the telephone by pressing a connection control key provided on the telephone desired to make a call.

[Problems to be Solved by the Invention] On the other hand, as a device using a telephone line, in addition to a voice terminal such as a telephone, a device performing data communication via analog modulation / demodulation such as a facsimile device has recently been known. When such a data communication device is connected to the KTS as described above, a structure in which the data communication device is connected to the data communication device as one of dedicated telephones can be considered.

If the data communication device is set to the automatic incoming call mode with such a structure, the data communication device automatically starts data communication based on the detection of the call signal. For this reason, the main unit or the dedicated telephone is provided with operating means, and switching is made between the facsimile apparatus and the telephone according to the operation of the operating means, which are automatically called or given preferentially. A way is being considered.

However, in such control of the call right by manual operation, there is a problem that a call from the telephone is received by the data communication device due to an operation error.

 An object of the present invention is to solve the above problems.

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, in a communication device including an exchange device and an extension terminal connected to the exchange device, Connection means for connecting the communication terminals, a generating means for generating a ringing tone in response to an incoming call command output from the switching device at the time of an incoming call, a responding means for responding to the incoming call, and generating a ringing tone by the generating means. And a transmitting means for transmitting a calling signal to another communication terminal connected to the connecting means if the other responding terminal connected to the responding means and the switching device does not respond within a predetermined time after that. Adopted.

[Operation] According to the above configuration, at the time of an incoming call, the extension terminal generates a ringing tone by the generating means in accordance with the incoming call command output from the switching device, and is connected to the answering device and the switching device within a predetermined time. If the other extension terminal does not respond, a call signal is transmitted to another communication terminal connected to the connection means to call the other communication terminal.

EXAMPLES Hereinafter, the present invention will be described in detail based on examples shown in the drawings.

FIG. 1 shows the configuration of a key telephone system employing the present invention. In FIG. 1, reference numeral 1 denotes a telephone line which is connected to a KTS main unit denoted by reference numeral 2. The KTS main unit 2 is connected to a dedicated telephone with a facsimile adapter function indicated by reference numeral 5 through four lines, two of which are used as a telephone line 3 used for telephone calls, and the other two lines are dedicated telephones. 5 is used as a control line 4 used for control. The dedicated telephone 5 is connected to a line terminal 8 of a facsimile machine 7 via a two-line communication line 6. The telephone terminal 9 of the facsimile machine 7 has a two-wire attached telephone connection line 10
Is connected to the facsimile attached telephone 11.

FIG. 2 is a block diagram of a dedicated telephone according to the present invention. The communication line 3 connected to the main unit is a control circuit.
The connection can be switched between the hook switch 12 and the DC loop detection circuit 20 via the two relays 17a and 17b controlled synchronously by 21.

When used as a normal telephone, the relay 17a hooks up the telephone line 3 connected as the main unit.
When the hook switch 12 is open, the speaker 14 is connected via the amplifier 13 controlled by the control circuit 21.When the hook switch 12 is closed, the speaker 14 is connected via the communication circuit 15. The handset 16 is connected and can talk. Information on opening and closing the hook switch is transmitted to the control circuit 21. At this time, the relay 17b connects the DC power supply circuit 18 to the facsimile communication line 6.
To supply power to the facsimile machine 7.

The control line 4 from the main unit is connected to the main unit interface 22, and the information is transmitted to the control circuit 21.
When an incoming command is received from the main unit, the dedicated telephone set 5 sends out a calling signal to the communication line 6 to the facsimile apparatus 7 by an IR (calling signal) sending circuit 19 as described later, and the facsimile forms a DC loop. Wait to do. The DC loop detection circuit 20 is a circuit for detecting whether or not a DC loop is formed on the communication line 6 to the facsimile, and the control circuit 21 simultaneously controls the two relays 17a and 17b when the facsimile forms the DC loop. Then, the communication line 3 from the main device and the communication line 6 to the facsimile device 7 are connected to perform facsimile communication.

Reference numeral 23 denotes a key composed of a dial key, a one-touch dial key, a function key, and the like, and information on depression thereof is sent to the main device by the control circuit 21 via the main device interface 22. Also,
Keys for starting speaker reception and canceling speaker reception (hereinafter referred to as speaker keys), and keys for setting the dedicated telephone to the facsimile automatic reception mode and canceling the facsimile automatic reception mode ( Hereinafter, the key 23 is also included in the key 23.

The automatic reception mode switching key does not remotely control the reception mode of the facsimile machine 7. In this embodiment, it is possible to select whether the facsimile apparatus 7 preferentially receives an incoming call or the dedicated telephone 5 performs an incoming call for the purpose of a call. This is for controlling the mode switching on the dedicated telephone side. When the mode switching key is turned on, the exclusive telephone 5
An IR signal is generated, and the facsimile machine 7 is called.

FIG. 3 shows a block diagram of a circuit configuration of the facsimile machine 7. As shown, the facsimile machine 7 has a very general configuration. The line terminal 8 to which the telephone line 6 is connected is connected to two relays 27a and 27a controlled by the control circuit 30.
It is connected to the telephone terminal 9 via 7b.

Since the facsimile-attached telephone 11 is connected to the telephone terminal 9, a DC loop is formed in the attached telephone connection line 10 by off-hook of the facsimile-attached telephone 11, so that a telephone call can be made through the telephone line 6. The DC loop detecting circuit 34 is a circuit for detecting that a DC loop is formed in the attached telephone connection line 10, and the information is transmitted to the control circuit 30. The IR detection circuit 24 is
When the facsimile apparatus 7 is in the automatic reception mode, the control circuit 30 forms a DC loop by the DC loop forming circuit 25 and detects the relay 27a by the modem 28 when the facsimile apparatus 7 is in the automatic reception mode. Side to perform facsimile communication.

The keys 29 connected to the control circuit 30 include a start key, a stop key, a numeric keypad, a one-touch dial key, a function key, and the like. DC power supply circuit 31
When the relay 27a is switched to the modem 28 side,
A circuit for supplying a DC current for detecting a DC loop on the attached telephone connection line 10, a graphic reading unit 32, and a graphic output unit 33 are used for reading and outputting a graphic, a sound source 35, and The speaker 36 is used to emit a warning sound or the like. The dialing circuit 26 is a circuit that sends a dial tone or a dial pulse to the communication line 6 according to the control of the control circuit 30.

 Next, the operation in the above configuration will be described.

FIG. 4 shows a control procedure of the exclusive telephone 5. This fourth
The procedure in the figure is stored in the ROM 21a as a program of the control circuit 21. It is assumed that flows having the same number are connected at that part. In the following procedure, the facsimile machine 7 is set to the automatic reception mode by the key 29.

Step S1 in FIG. 4 is executed by resetting the control circuit 21, but here, as shown in FIG.
Set 7b to the initial state. That is, the relay 17a is switched to the hook switch 12, and the relay 17b is connected to the DC power supply circuit 1.
Switch to 8 side.

Subsequently, the process enters a loop of steps S2 and S3. Here, the processing of a normal dedicated telephone is executed until the automatic reception mode switching key is pressed. That is, if the handset is off-hook, the off-hook code is transmitted to the main device to put the telephone into a call state, or if the speaker key is pressed, the code is transmitted to the main device and the speaker is set to the listening mode. Executed in

When the automatic reception mode switching key included in the key 23 of the special telephone 5 is pressed, the special telephone enters the automatic reception mode and enters a loop of steps S4, S5, and S6. In this loop, in step S4, similar to step S2, a normal dedicated telephone process is performed, and in step S5, it is determined whether an incoming command has been received from the main device. At S6, it is determined whether the automatic reception switching key is pressed. When the automatic reception mode switching key is pressed, the automatic reception mode is released, and the process returns to the loop of steps S2 and S3.

When there is an incoming call, the main device transmits an incoming call command to the dedicated telephone 5 and sends a ringing sound through the communication line 3.
The control circuit 21 determines in the loop of steps S4, S5 and S6
When an incoming command is received from the main unit, the process proceeds to step S7 and subsequent steps according to the determination in step S5.
In step S8, a timer is set, and in step S8, the amplifier 13 is turned on, and the process enters a loop of steps S9, S10, and S11. This loop is repeated in step S11 until the timer times out. During that time, a ringing sound coming from the main unit through the communication line 3 is heard from the speaker. In this loop, if an off-hook operation such as off-hook of the handset or pressing of a speaker key is performed, the step S9 is performed.
The process returns to the loop of S4, S5, and S6, and the telephone function is executed in step S4 to enter the talking state or the speaker receiving state. Also, when the incoming call is stopped or another dedicated telephone responds, the main device transmits an incoming call stop command to the non-responding dedicated telephone and stops transmitting the ringing sound.
When the control circuit 21 receives the incoming stop command from the main device before the off-hook operation is performed, the control circuit 21 turns off the amplifier 13 in step S22, and returns to the loop of steps S4, S5, and S6.

If a timeout occurs in step S11, that is, if the other telephone or the dedicated telephone 5 has not made an off-hook response for a certain period of time, step S1
In step 2, the IR transmitting circuit 19 starts transmitting a calling signal to the telephone line 6 to the facsimile, and proceeds to steps S9, S10, S11,
It enters the loop of S12 and S13. In this loop, when it is determined that the off-hook operation of the dedicated telephone 5 has been performed, step S20 is performed.
In step S4, the transmission of the calling signal is stopped, and the process returns to the loop of steps S4, S5, and S6, and when it is determined that the reception stop command is received from the main device, the transmission of the calling signal is stopped in step S21, and Turn off the amplifier and go to steps S4 and S
5. Return to the loop of S6. In step S13, it is detected whether the facsimile machine 7 has formed a DC loop in the communication line 6.

When the facsimile apparatus 7 is set to the automatic reception mode, a known automatic facsimile reception operation is started in response to a call signal (IR signal) sent from the dedicated telephone 5 in step S12. That is, the control circuit 30 of the facsimile apparatus 7 detects that the calling signal is
When the detection is performed by the detection circuit 24, a DC loop is formed by the DC loop forming circuit 25, the relay 27a is switched to the modem 28 side, and facsimile communication is started. In the dedicated telephone 5,
Since the formation of the DC loop can be detected by the DC loop detection circuit 20, the process proceeds to step S14 and subsequent steps according to the determination in step S13.

In step S14, the transmission of the call signal is stopped, and
In step 15, the off-hook code is transmitted to the main unit, and step S1
6, the two relays (17a, 17b) are switched, and the telephone line 3 from the main unit is connected to the telephone line 6 to the facsimile,
It enters the loop of step S17. In the loop of step S17, the facsimile communication ends (that is, the facsimile 7 cuts the DC loop of the DC loop forming circuit 25,
After the facsimile communication is completed, the two relays (17a, 17b) are returned to the initial state in step S18, and the on-hook code is mainly transmitted in step S19. The data is transmitted to the device, and the process returns to the loop including steps S4, S5, and S6.

As described above, according to the present embodiment, if the facsimile apparatus is set to the automatic reception mode and the automatic reception mode switching key of the dedicated telephone 5 is turned on, the dedicated telephone 5 (or the main It is possible to wait for a response from another connected telephone) and send a call signal to the facsimile apparatus only when there is no response for the purpose of telephone call, thereby performing an automatic reception operation.

For this reason, there is no problem that the facsimile responds unconditionally as in the related art. Further, the facsimile apparatus can be used with any apparatus as long as it can set an automatic incoming call mode based on a call signal.

In the above, even after the telephone response for a certain period of time is detected, and the process proceeds to the call of the facsimile machine 7, the process returns from step S13 to step S9 in FIG. 4 to enable the telephone response. For this reason, the telephone can be answered during a time obtained by adding 5 to 6 seconds until the facsimile apparatus responds to the fixed time to form a DC loop.

However, if it is detected that there is no telephone response for a certain period of time, facsimile communication may be immediately started to prohibit telephone response. FIG. 5 shows such a control procedure. FIG. 5 shows a control procedure of the exclusive telephone 5 similarly to FIG.

In FIG. 5, the difference from FIG.
This is the control in the step that shifts from S9 to S10, and is otherwise the same as FIG. Here, only the portions different from FIG. 4 will be described.

After receiving the incoming command from the main unit and executing steps S7 and S8 in the same manner as in FIG. 4, an off-hook, incoming stop command or timeout of a predetermined time is detected in steps S9 to S11.

If the incoming call is stopped, the amplifier 1 is immediately set in step S20 '.
Turn off 3 to stop ringing.

In the case of a timeout of a predetermined time, step S2
At 2 ', similarly, the ringing of the ringing sound due to the turning off of the amplifier 13 is stopped, and the flow shifts to step S12 to send a calling signal to the facsimile machine 7. That is, detection of calling and answering by the telephone is stopped.

Next, in step S10 ', an incoming termination command of the main device is detected. When this command is detected, the output of the calling signal is stopped in step S21, and if a DC loop of the communication line 6 due to the facsimile device response is detected in step S13, the same facsimile communication as in FIG.

According to the above procedure, similarly to the above, the telephone can be given a call right for a certain period of time, and then the facsimile call right can be given.In this case, if there is no telephone response for a certain period of time, the facsimile communication is immediately started. There are excellent effects such as being able to shift, to obtain a received original, or to quickly transmit an original (such as in the case of bowling).

If the automatic reception changeover switch of the dedicated telephone is turned off, an incoming call is always made only by the telephone. In this case, incoming call control to the facsimile apparatus is prohibited by the dedicated telephone 5.

In the above embodiment, a configuration in which the fixed time during which the call right is given to the telephone is not a fixed value but is variably controlled may be considered.
In this case, an operation means such as a slide volume is provided in the dedicated telephone, and the predetermined time is controlled to a desired time value including 0 hour by operating this means.

Although the facsimile apparatus has been described above as an example, it is needless to say that the above configuration can be implemented even when other data communication apparatuses are used.

[Effects of the Invention] As is clear from the above, according to the present invention,
The extension terminal generates a ringing tone by the generation means in response to the incoming command output from the exchange, and connects to the connection means if the response means and another extension terminal connected to the exchange do not respond within a predetermined time. A call signal is transmitted to another communication terminal that has been set, and another communication terminal is called.

That is, since another communication terminal is connected to the extension terminal connected to the switching device that outputs an incoming command when receiving a call, and a call signal is transmitted from the extension terminal to the other communication terminal, the other communication terminal is connected to the switching device. It is not necessary to directly connect to the extension terminal, to effectively use the connection unit provided in the switching device to connect the extension terminal, and not respond to the incoming command of the switching device as another communication terminal, Can be easily connected as long as it responds to a general call signal, and if an extension terminal or another extension terminal does not respond within a certain period of time when a call arrives, it is connected to that extension terminal. There is an excellent effect that another communication terminal can be made to respond and the incoming terminal can be automatically selected without any troublesome switch switching operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of a communication apparatus employing the present invention, FIG. 2 is a block diagram showing the structure of a dedicated telephone set shown in FIG. 1, and FIG. 3 is a configuration of the facsimile apparatus shown in FIG. The block diagram, FIG. 4 and FIG. 5 are flow charts showing control procedures for different dedicated telephones. 3, 6: telephone line, 4: control line, 5: dedicated telephone, 7: facsimile, 8: line terminal, 9: telephone terminal, 11: telephone with facsimile, 12: hook switch, 13: amplifier, 14: speaker, 15: telephone circuit, 16 ... handset 17, 27 ... relay 18, 31 ... DC power supply circuit 19 ... IR transmission circuit 20, 34 ... DC loop detection circuit 21, 30 ... control circuit 24 ... IR detection circuit 25 ... DC loop formation circuit 28 ... modem

Claims (3)

(57) [Claims] 1. A communication device comprising a switching device and an extension terminal connected to the switching device, wherein the extension terminal has connection means for connecting another communication terminal, and is output from the switching device when an incoming call is received. Generating means for generating a ringing tone in response to the incoming call command; responding means for responding to the incoming call; being connected to the responding means and the switching device within a predetermined time after generating the ringing tone by the generating means. A communication apparatus, comprising: a transmission unit that transmits a call signal to another communication terminal connected to the connection unit when another extension terminal does not respond. 2. The method according to claim 1, wherein the generating unit generates a ringing tone until another communication terminal connected to the connecting unit responds to the calling signal transmitted by the transmitting unit, and receives a response by the responding unit. The communication device according to claim 1, wherein: 3. The extension terminal according to claim 1, wherein said extension terminal further comprises control means for variably controlling said fixed time to a desired time value including 0 hour. Communication device.