JPH08293839A - Cordless telephone set with facsimile equipment - Google Patents

Abstract

PURPOSE: To avoid noise disturbance from a facsimile system to a cordless telephone system. CONSTITUTION: A base band signal processing circuit 12 controlling a voice signal line, a radio circuit 13 connecting a system to a slave machine HS through a radio channel and a first microcomputer 21 controlling the operations of the base band signal processing circuit 12 and the radio circuit 13 are provided. A read part 42 reading an original to be transmitted, a printing part 43 printing a character or the like, which follows a received facsimile signal, and second microcomputers 31-36 controlling the transmission of the original and the reception of the facsimile signal are provided. A CPU 31 of the second microcomputers sets thee system to be a halt state when the transmission of the original and the reception of the facsimile signal are not executed, and releases the halt state when the transmission of the original and the reception of the facsimile signal are executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone with a facsimile.

[0002]

2. Description of the Related Art When making a telephone multi-functional, it is possible to add a facsimile function to a cordless telephone. In that case, a control unit of the cordless telephone system and The control unit of the facsimile system is composed of a separate microcomputer.

At that time, the control unit of the cordless telephone system can be constructed by a so-called one-chip microcomputer in which a CPU, a ROM, a RAM, a peripheral circuit and the like are integrated into one IC.

However, since the control section of the facsimile system has many control objects and contents, the CPU, ROM, RAM, peripheral circuits, etc. are formed by respective separate ICs, and a system bus (data bus) is provided between the ICs. , Address bus and control bus).

[0005]

By the way, the microcomputer of the control unit of the cordless telephone system is the one-chip I
Since it is C-coded, it hardly causes interference in the high-frequency signal system of the cordless telephone. Alternatively, it is integrated into an IC so as not to give interference.

However, in the microcomputer of the control unit of the facsimile system, as described above, each bus line has an I
C is connected, and CPU is ROM, RAM
And because the peripheral circuits are always accessed at high speed,
A lot of noise is generated from the bus line.

As a result, when a facsimile function is added to a cordless telephone, it interferes with a wireless channel (for example, 240 to 380 MHz) used between a master unit and a slave unit, and many channels cannot be used. , Noise is mixed in the call.

For this reason, in the conventional cordless telephone with a facsimile, the physical distance between the cordless telephone system and the facsimile system is increased, or the circuit board of the facsimile system is covered with a shield case so that the facsimile system can be used. The noise generated in the control unit does not interfere with the cordless telephone system.

However, the distance between the facsimile system and the cordless telephone system is restricted by the shape and size of the product,
It may not always be sufficient. Also,
Shielding the circuit board causes an increase in cost.

The present invention is intended to solve the above problems.

[0011]

Therefore, according to the present invention, a baseband for controlling a radio circuit for connecting a slave unit through a radio channel and an audio signal line between a telephone line and the radio circuit. A signal processing circuit, a first microcomputer that controls the operations of the wireless circuit and the baseband signal processing circuit, a reading unit that reads a document to be transmitted, and a printing unit that prints characters according to the received facsimile signal. And a second microcomputer that controls the transmission of the original document and the reception of the facsimile signal, and the CPU of the second microcomputer does not perform the transmission of the original document and the reception of the facsimile signal. Sometimes, the halt state is set, and the original document is transmitted and the facsimile signal is received. Kiniwa is for a facsimile with cordless telephone as the halt status is released.

[0012]

When used as a cordless telephone, the CPU of the facsimile system is in the halt state, and only when used as the facsimile device, the CPU of the facsimile system is released from the halt state and becomes the facsimile device. Process.

[0013]

EXAMPLE Considering a cordless telephone with a facsimile, when the telephone is used as a telephone, the facsimile system cannot normally be used, but there is no problem. On the other hand, when it is used as a facsimile machine, the telephone system cannot be used normally, but that is not a problem. That is, even if the facsimile system and the telephone system are used exclusively, no problem occurs and no problem occurs.

In view of such a point, the present invention significantly reduces the influence of noise from the facsimile microcomputer to the cordless telephone system.

An example thereof will be described below with reference to FIG.

In the example shown in FIG. 1, a base unit of a cordless telephone and a facsimile device are integrated with each other. Therefore, the telephone has a base unit 10 and a facsimile system 30. Note that reference numeral HS indicates a child device, and reference numeral LN indicates a telephone line.

The base unit 10 has, as its voice signal system, a line interface 11, a baseband signal processing circuit 12, a radio circuit 13, a transmitter 14, and a receiver 15.
Have.

In this case, the line interface 11 is
Although commonly used with the facsimile system 30,
It has a switch circuit for a hook switch that opens and captures the telephone line LN and a 2-wire / 4-wire conversion circuit. In addition, the baseband signal processing circuit 12 includes a telephone line LN,
The wireless circuit 13, the transmitter 14, and the receiver 15 switch audio signal lines, and the like. The wireless circuit 13 connects the master device 10 and the slave device HS through a wireless channel. , For transmitting and receiving voice signals and data.

Further, the base unit 10 has a microcomputer 21 for system control. Although not shown in the drawing, the microcomputer 21 is, as described above, C
The PU, the ROM in which the processing program is written, the RAM for the work area, the peripheral circuit, and the like are integrated into one chip IC.

Then, the microcomputer 21
An incoming call detection circuit 22, a dial key 23, various operation keys 24, a dial signal forming circuit 25, and a display 26 are connected to the computer, and the microcomputer 21 controls the operations of the baseband signal processing circuit 12 and the wireless circuit 13. To be done.

On the other hand, the facsimile system 30 has a CPU 31, a ROM 32 in which various programs are written, a work area RAM 33, and a RAM 34 for storing various data as a facsimile device and an input for controlling the system. It has a peripheral circuit (interface circuit) 35 for output.

In this case, the CPU 31 to the peripheral circuit 35 are
As described above, the ICs are independently formed. Therefore, the CPU 31 to the peripheral circuit 35 are connected to each other through the system bus 36.
Although not shown, the RAM 34 is made non-volatile by backing up, for example, a battery.

The CPU 31 is connected to a modem 41 that converts (demodulates) the received facsimile signal into data and converts (modulates) the data to be transmitted into a facsimile signal, and detects the output of the incoming detection circuit 22. Is also supplied. Further, in the ROM 32, as a part of the program, for example, a routine 1 as shown in FIG.
00 is prepared.

Further, the peripheral circuit 35 is connected to a reading unit 42 having a line sensor for reading an original to be transmitted, and a printing unit 43 for printing out a received facsimile signal on a sheet. .

Further, the microcomputer 21 and the CPU
31 is connected through a communication line 44, and data is accessed between the microcomputer 21 and the CPU 31 as needed. Further, an interrupt line 45 is connected to the CPU 31 from the microcomputer 21. Further, in this example, the microcomputer 21 is connected to the document detecting section 46 of the document to be transmitted and the operation key 47 of the facsimile system 30.

In such a configuration, when the power of this telephone is turned on, the CPU 31 starts the processing of the routine 100, and in step 101, the facsimile system 3
0 parts are initialized, then in step 102,
The CPU 31 enters the halt state. In this halt state, the CPU 31 accepts only an interrupt and, when the RAM 33 is a dynamic RAM, only refreshes it.

Therefore, the CPU 31 is in this halt state until an interrupt request is made, and in this halt state, the data signal and address signal of the system bus 36 are stopped.

When a facsimile call arrives through the telephone line LN, this is detected by the incoming call detection circuit 22 and the detection output is supplied to the CPU 31 as an interrupt signal. Alternatively, when a facsimile signal arrives, it is detected by the modem 41, and the detected output is supplied to the CPU 31 as an interrupt signal.

When an interrupt signal is supplied to the CPU 31, the CPU 31 is interrupted and the CPU 3
The process of No. 1 starts from step 103 of the routine 100, in which the halt state of the CPU 31 is released, and then the process proceeds to step 104.

Then, in step 104, the facsimile signal from the telephone line LN is converted into data by the modem 41 and taken into the CPU 31, and
Characters and images based on the data are printed out by the printing unit 43.

When the reception of the facsimile signal is completed, the process of the CPU 31 returns from step 104 to step 102, and the CPU 31 returns to the halt state.

Further, when the CPU 31 is in the halt state and a document to be transmitted is set in the reading unit 42, this is detected by the document detecting unit 46 and the microcomputer 21 is notified. Alternatively, when one of the operation keys 47 for instructing the transmission of a document is operated, this is detected by the microcomputer 21.

When this notification or detection is made, the microcomputer 21 sends an interrupt line 45.
An interrupt signal is supplied to the CPU 31 through the CPU 31. As a result, the CPU 31 is interrupted, the processing of the CPU 31 starts from step 103 of the routine 100, and the halt state of the microcomputer 21 is released as described above.

Next, the process proceeds to step 104, and in this step 104, since the original is transmitted in this case,
The document is read by the reading unit 42, the data is converted into a facsimile signal by the modem 41, and this signal is sent to the telephone line LN.

When the transmission of the original is completed, the CPU
The process of 31 returns from step 104 to step 102, and the CPU 31 returns to the halt state.

As described above, in the facsimile system 30, the CPU 31 is in the halt state during the period in which the facsimile signal is not received or transmitted, and when a request for receiving or transmitting the facsimile signal is made, this is detected by the interrupt. , Receive or send it.

On the other hand, in the base unit 10, when the power is turned on, the microcomputer 21 initializes each unit, and enters a standby state for outgoing calls and incoming calls.

At the time of calling, the microcomputer 21 controls the dial signal forming circuit 25 to form the dial signal of the telephone number of the other party, and this dial signal is sent out to the telephone line LN through the line interface 11, and thereafter. When the other party answers the call, the call is ready.

At the time of a call, the microcomputer 21 controls the baseband signal processing circuit 12 and the radio circuit 13, and the call is made by using the transmitter 14 and the receiver 15, or by using the handset HS. .

Furthermore, when an incoming call is received by the incoming call detection circuit 22 and the incoming call is an incoming call of the telephone,
This is notified to the microcomputer 21, and thereafter, the transmitter 14 and the receiver 15 are used, or the handset HS
You are ready to talk using.

Since the CPU 31 is in the halt state and the data signal and the address signal of the system bus 36 are stopped as described above at the time of making a call, at the time of making a call, and at the time of receiving a call, the master unit 10 is a facsimile machine. The effect of noise from the system 30 will be drastically reduced.

Thus, according to this telephone, when the facsimile system 30 is not used, the CPU 31 for controlling the system is in the halt state, so that the base unit 1
The influence of noise on 0 can be greatly reduced. Therefore, since it is not necessary to increase the physical distance between the base unit 10 and the facsimile system 30 or shield the facsimile system 30, the shape and size of the telephone are not limited and the cost is reduced. There is no rise.

In the above description, the outputs of the document detecting section 46 and the operation keys 47 are the microcomputer 21.
Although it is supplied to the CPU 31 through the above, it may be directly supplied to the CPU 31. Further, it is also possible to access signals between the incoming call detection circuit 22, the modem 41 and the CPU 31 via the microcomputer 21.

[0044]

According to the present invention, the facsimile system 30 is provided.
It is possible to significantly reduce the influence of noise on the master device 10. Therefore, the base unit 10 and the facsimile system 30
To increase the physical space between
There is no need to shield the

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a flowchart showing an example of the present invention.

[Explanation of symbols]

 10 Base Unit 11 Line Interface 12 Baseband Signal Processing Circuit 13 Radio Circuit 14 Transmitter 15 Handset 21 Microcomputer 22 Incoming Detection Circuit 25 Dial Signal Forming Circuit 30 Facsimile System 31 CPU 32 ROM 33 RAM (for Work Area) 34 RAM ( (For data storage) 35 Peripheral circuit 36 System bus 41 Modem 42 Reading section 43 Printing section 44 Communication line 45 Interrupt line 46 Original detection section LN Telephone line

Claims (3)

[Claims] 1. A wireless circuit for connecting a slave unit through a wireless channel, a baseband signal processing circuit for controlling an audio signal line between a telephone line and the wireless circuit, the wireless circuit and the baseband. A first microcomputer that controls the operation of the signal processing circuit, a reading unit that reads a document to be transmitted, a printing unit that prints characters according to the received facsimile signal, and the transmission of the document and reception of the facsimile signal. A CPU for controlling the transmission of the original document, and the CPU of the second microcomputer is in the halt state when the original document is not transmitted and the facsimile signal is not received. When the facsimile signal is received, the halt state should be released. Cordless telephone with a facsimile. 2. The cordless telephone with a facsimile machine according to claim 1, wherein the first microcomputer has a CPU, a ROM in which a program is written, a RAM for a work area, peripheral circuits, etc., which are integrated into one chip IC. The second microcomputer includes the CPU, a ROM in which a program is written, and a work area RAM.
A cordless telephone with a facsimile, in which the peripheral circuit and the peripheral circuit are formed as separate ICs and are connected to each other through a system bus. 3. The cordless telephone with a facsimile machine according to claim 2, wherein when the original document is transmitted and the facsimile signal is received, the CPU of the second microcomputer is interrupted, and this interrupt causes the interruption. A cordless telephone with a facsimile in which the above-mentioned halt state is released.