JP2809651B2 - Communication device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a communication device, and more particularly, to a communication device having a monitor function.

2. Description of the Related Art Conventionally, a communication device, such as a facsimile device, has a monitoring function of monitoring a communication signal during communication.

As such a facsimile machine, for example,
Some are shown in the figure. In FIG. 4, the facsimile apparatus 1 includes a line switch 2, a line protection device 3, a modem 4, a control unit 5, a speaker amplifier 6, a speaker 7, a call signal detection unit 8, a telephone circuit 9, and the like. The telephone line L is connected to the switch 2.

In the facsimile apparatus 1, a call signal from the telephone line L is detected by a call signal detection unit 8, and the control unit 5 makes the bell of the telephone circuit 9 ring based on the detection result. After ringing the bell
When the handset of the telephone circuit 9 is off-hook within a predetermined time, the control unit 5 connects the telephone line L to the telephone circuit 9 as it is to enable a telephone call with the handset.
On the other hand, if the off-hook is not performed within a predetermined time after the ringing of the bell, the control unit 5 outputs a switching signal to the line switching unit 2 to switch the telephone line L to the modem 4, and exchanges a signal of facsimile communication via the modem 4. Do. The communication signal at this time is monitored by the speaker 7 via the speaker amplifier 6. Also, when facsimile transmission is performed from the facsimile apparatus 1, the communication signal is monitored by the speaker amplifier 6 and the speaker 7.

Therefore, by listening to the monitor sound of the communication signal, the operator can confirm that facsimile communication is being performed reliably.

In addition, telephones having a voice call function for making a voice call via a microphone of a speaker without using a recent handset have appeared, and their suitability has been claimed. Such telephones include, for example, those shown in FIG. That is, in the telephone 10, the line L is switched between the handset 12 and the loudspeaker 13 by the switch 11, and when ringing occurs from the line L in the state shown in the figure, the bell ringing circuit 14 rings the bell. When the operator turns off the handset 12 in response to the bell sound, the switch 15 is switched to the handset 12 side, and a call can be made by the handset 12 via the call control circuit 16. In this state, when the operator selects the loudspeaker function using a switch (not shown), the switch 11 is switched to the loudspeaker 13 side, and the loudspeaker 18 and the microphone are controlled by the loudspeaker communication control circuit 17.
Voice calls can be made via 19. In dialing, the dial signal is transmitted from the dial transmitting circuit 20 to the line L via the switching unit 15 and the switching unit 11 by off-hooking the handset 12 and performing dial input. When the speaker selects the loudspeaker function, the loudspeaker 13 enables a loudspeaker call.

(Problems to be Solved by the Invention) However, such a conventional facsimile apparatus does not include a telephone circuit having a loudspeaker function, and cannot make a loudspeaker call during a telephone call. Was inconvenient.

As a countermeasure, the facsimile machine 1 shown in FIG.
It is conceivable to employ a telephone 10 having a loudspeaker function shown in FIG.

However, simply attaching the telephone with the loudspeaker function to the facsimile apparatus with the monitor function causes a problem that the loudspeaker function of the telephone and the monitor function of the facsimile apparatus overlap, and the cost of the facsimile apparatus increases.

(Objects of the Invention) Accordingly, the present invention provides a handset by performing switching operation of one communication control circuit with a loudspeaker key during communication or data communication to execute a loudspeaker call function, a handset call function and a handset loudspeaker function. It is an object of the present invention to reduce the number of parts of a communication device, simplify the configuration, and reduce the cost of the communication device by performing a telephone call, a voice amplification function during a telephone call, and monitoring during data communication.

(Constitution of the Invention) In order to achieve the above object, the present invention provides a handset call function using a handset, a voice call function using a microphone and a speaker provided separately from the handset, a call using the handset, and a monitor output using the speaker. In a communication device having a handset loudspeaker function, the communication device is connected to the handset, a microphone, and a speaker, and executes switching of each function according to a predetermined switching signal to drive the handset, the microphone, and the speaker. Unit, a modem unit for modulating / demodulating a data signal transmitted / received via a line, and outputting a voice signal from the handset or microphone to the line via the call control unit and outputting a data signal from the modem to the line. Communication mode switching unit, and the handset communication A speech function, a loudspeaker key for selectively instructing a loudspeaker function and a handset loudspeaker function, and a call controller according to an operation state of the loudspeaker key when a voice signal or a data signal is input from a line. And a control unit for outputting a predetermined switching signal to execute switching of each function.

 Hereinafter, a specific description will be given based on examples of the present invention.

 1 to 3 are views showing an embodiment of the present invention.

In FIG. 1, a communication device, for example, a facsimile device 21 includes a line connection unit 22, a call signal detection unit 23, a line protection device 24, a two-wire / four-wire conversion unit 25, and a communication mode switching unit (corresponding to a mode switching unit) 26. , Communication control circuit (equivalent to communication control unit) 2
7, a hook switch 28, a handset 29, a microphone 30, a speaker 31, a modem 32, a control section 33, a bell ringing circuit 34, a unit section 35, and the like. The facsimile apparatus 21 accommodates a telephone line L.

The line connecting unit 22 connects / controls the telephone line L under the control of the control unit 33.
After disconnection, the call signal detection unit 23 detects the call signal from the telephone line L and notifies the control unit 33 of the detection. 2-wire 4-wire converter 25
Converts two lines into four lines, outputs a signal received from the telephone line L to the communication control circuit 27 and the modem 32, and outputs a call output from the call control circuit 27 input through the communication mode switching unit 26 or The transmission output from the modem 32 is sent to the telephone line L. The communication mode switching section (communication mode switching means) 26 operates under the control of the control section 33, and selectively switches between the speech output from the speech control circuit 27 and the transmission output from the modem 32 to convert it into a 2-wire to 4-wire converter. Output to 25. The call control circuit 27 includes a transmission detection circuit, a reception detection circuit, a gain adjustment circuit, a transmission / reception control circuit, and the like, and enables communication with the handset 29, and includes a function switch, a microphone amplifier, a speaker amplifier, and the like. The loudspeaker 31 has a loudspeaker call function that enables a loudspeaker call. Function switching of the call control circuit 27 is performed by a switching signal Sc from the control unit 33. As shown in FIG. 2, the switching signal Sc is a 4-bit signal having a bit configuration corresponding to each function. That is, the switching signal Sc indicates a handset call function when "1010", a voice call function when "0100", and a handset voice function when "1101". The handset voice function is a call using the handset 29 and a monitor using the speaker 31. A function that has both. The selection of this function can be performed by a voice call key (not shown) provided on the operation unit of the facsimile machine 21. Hook switch
28 detects the on-hook / off-hook of the handset 29 and outputs it to the control unit 33, and the modem 32 modulates and demodulates a communication signal at the time of facsimile communication. The control unit 33 has a CPU (Central Pro
ccessing Unit), ROM (Read Only Memory), RAM (Ran
A dom access memory), an I / O port, and the like are provided, and each section of the facsimile machine 21 is controlled according to a program in the ROM to execute a sequence as the facsimile machine 21 and to execute a function switching process of the present invention. Bell ringing circuit
34 rings a bell (not shown) in response to a drive signal from the control unit 33, and a unit 35 collectively refers to all the other units such as a scanner, a plotter, and an encoding / decoding unit that are usually provided in the facsimile apparatus 21. Things.

 Next, the operation will be described.

The present invention is characterized in that a loudspeaker process during a call and a monitor process during a communication can be performed by one call control circuit. Hereinafter, this function switching process will be described with reference to the flowchart shown in FIG.

In the initial state, the communication mode switching unit 26 of the facsimile apparatus 21 is connected to the communication control circuit 27 side, and the line connection unit 22 is open. In this state, the telephone line L
When the calling signal is input from the, the calling signal detecting unit 23 detects the calling signal, binarizes it, and outputs a detection signal to the control unit 33 (step S ₁ ). When the detection signal the control unit 33 from the call signal detector 23 is inputted, it outputs a drive signal to the ringing circuit 34 to sound the bell (step S _2), when the handset 29 is off-hook within a predetermined time (Step S ₃ ,
S ₄ ), while closing the line connection unit 22,
It stops outputting the drive signal to the 27 to terminate the ringing of the bell (step S _5). At this time, since the communication mode switching unit 26 is connected to the call control circuit 27 side, the operator can make a call using the handset 29 together with the off-hook of the telephone circuit 9, and in this state, the on-hook without the voice call key being pressed. (Step S ₆ ,
S _7), the control unit 33 determines that the call has ended line connecting section
And 22 to open and disconnect the telephone line L, the flow is ended (step S _12).

During a call, when the loudspeaker key is pressed (step S ₆ ,
S ₇ ), the control unit 33 outputs the switching signal Sc to the call control circuit 27 and sets it to the loudspeaker call function, and the microphone 30 and the speaker 31
Allow hands-free communication by a (step S _8). further,
When the loudspeaker key is pressed in this state (step S ₉ ),
The control unit 33 outputs a switching signal Sc to specify the handset calls the call control circuit 27 returns the function of the control unit 33 to the handset call function (Step S _10). Then, when on-hook (step S _11), and disconnects the line and terminates this flow (Step S _12).

In other words, during a call, by pressing the loudspeaker call key,
The voice call function and the handset call function can be sequentially switched and used.

Meanwhile, after ringing the bell contains call signal, the hook switch 28 is not on-hook within a predetermined time (Step S ₁ to S _4), the control unit 33 causes ends the ringing (step S _13), changeover signal to the communication mode switching unit 26 is connected to the modem 32 side (step S _14). Check if the loudspeaker key was pressed (step
S _15), when the speaker-phone call key is pressed to turn on the line connection unit 22 sets the call control circuit 27 to the handset loudspeaker function (Step S _16, S _17). When the loudspeaker key is not pressed, the line connection unit 22 is turned on and the modem
Enter facsimile communication via 32 (step
S ₁₇ ). Furthermore, Checks the speaker-phone call key during facsimile communication is depressed (step S _19), when the speaker-phone call key is pressed, by setting the call control circuit 27 to the handset loudspeaker function to enable monitoring (step S
₁₀ ). Thereafter, when the facsimile communication ends, the call control circuit 27 is set to the handset call function (step
S _21), the flow ends off the line connection unit 22 (step S _22).

Therefore, the received signal can be monitored also in facsimile communication using the voice call function of the call control circuit 27, the number of components of the facsimile apparatus 1 can be reduced, and the configuration can be simplified. As a result, it is possible to reduce the cost of the facsimile machine 1 that can perform the voice call and the communication monitor.

(Effects) According to the present invention, one communication control circuit is switched by a voice call key during communication or data communication, and
By executing the loudspeaker call function, handset call function, and handset loudspeaker function, it is possible to perform a call using the handset, a loudspeaker function during communication, and a monitor during data communication, thereby reducing the number of parts of the communication device to achieve a configuration. It can be simplified. As a result, the cost of the communication device can be reduced.

[Brief description of the drawings]

FIGS. 1 to 3 are diagrams showing one embodiment of an embodiment in which a communication apparatus according to the present invention is applied to a facsimile apparatus. FIG. 1 is a block diagram of the facsimile apparatus, and FIG. FIG. 3 is a diagram showing the relationship between the function of the control circuit and the switching signal,
FIG. 5 is a flowchart of the loudspeaker processing during communication and the monitor processing during communication. FIG. 4 is a block diagram of a conventional facsimile machine,
FIG. 5 is a block diagram of a conventional telephone with a loudspeaker. 21: Facsimile machine, 22: Line connection unit, 23: Call signal detection unit, 24: Line protection device, 25: 2-wire to 4-wire conversion unit, 26: Communication mode switching unit, 27 ... Call control circuit, 28 hook switch, 29 handset, 30 microphone, 31 speaker, 32 modem, 33 control unit, 34 ringing circuit, 35 unit unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04M 11/00-11/10 H04N 1/32 H04M 1/60

Claims (1)

(57) [Claims] A communication provided with a handset calling function using a handset, a voice communication function using a microphone and a speaker provided separately from the handset, and a handset voice communication function combining a call using the handset and a monitor output using the speaker. In the device, a call control unit connected to the handset, the microphone, and the speaker, and performing switching of each of the functions according to a predetermined switching signal to drive the handset, the microphone, and the speaker, and a data signal transmitted / received via a line A modem unit that modulates and demodulates the signal; a communication mode switching unit that outputs a voice signal from the handset or microphone to a line via the call control unit and outputs a data signal from the modem to the line; And loudspeaker and hand A loudspeaker key for selectively instructing a set loudspeaker function, and when a voice signal or a data signal is input from a line, a predetermined switching signal is output to the call controller in accordance with the operation state of the loudspeaker key. And a control unit for executing switching of each function.