JPH01114253A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To save electric power and to immediately answer to an incoming by turning on a power source little before communication with an originating side, loading program data and turning it off when communication terminates. CONSTITUTION:Since the power source 14 is turn-on-controlled by a power source turn on signal from a timer when it comes to a previously set time, program data is loaded on a RAM23 from an external storage device at that time. When there is the incoming from the originating side, circuits are immediately connected and an answer is made to the originating side so as to attain communication control since the program loading terminates. Since the power source 14 is turn-off-controlled when communication control terminates, it is desirable to turn on the power source 14 little before the communication start time if it is previously decided with an originating side. Thus, electric power can be saved and immediate answer can be attained with respect to the incoming.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply 11J control device for a communication terminal such as a facsimile machine.

[Prior Art] Conventionally, a communication terminal is provided with a modem 1, a terminal body 2, and a power supply control circuit 3, as shown in FIG. The signal is supplied to the terminal main body 2 and the power supply control circuit 3, whereby the power supply control circuit 3 connects the terminal main body 2 to the AC power supply 4. When the terminal body 2 confirms the Ci double signal, it outputs the ER double signal to the modem 1 and power supply control circuit 3. Modem 1 stops transmitting the Ci signal upon receiving the ER signal. Further, the power supply control circuit 3 maintains the ON state of the power supply by the ER multiplication signal.

Terminal body 2 outputs ER double signal and then outputs DR from modem 1.
When the signal is confirmed, it is confirmed that the line has been connected, and communication control via the modem 1 is performed. Then, when the communication control is completed, the sending of the ER multiplication signal is stopped. As a result, the power supply control circuit 3 controls the power supply to be turned off.

The power supply control circuit 3 used in this conventional device is constructed as shown in FIG. That is, the transistor 5 is turned on by the C1 signal, thereby operating the relay 6 and opening its normally open contact 6m, so that the power source 4 is connected to the terminal main body 2. Further, the transistor 5 is kept in an ON state by the ER multiplied signal.

[Problems to be solved by the invention] There is no problem with this conventional device if the terminal body 2 has internal program data for controlling it, but in order to perform various controls, the program data is stored on a floppy disk. etc., and when the power is turned on, the data is first transferred from the external storage device to RAM (random access).
There is a problem when loading program data into a memory (memory) and then outputting an ER multiplied signal based on the program data to perform communication control after loading the program data. That is, since it takes a certain amount of time to load the program, even if the caller makes a call by dialing, the caller cannot immediately respond. For this reason E
There is a risk that the calling side will disconnect the line before the R times signal is generated and a response is made, resulting in a problem that communication will not be possible.

To solve this problem, always turn on the power to the RA.
It is conceivable to leave the program loading for M always in a state so that when a call is received from the calling side, an ER signal is generated and a response can be made.

However, in this case, a new problem arises in that power is constantly being input, resulting in wasted power consumption.

SUMMARY OF THE INVENTION Therefore, the present invention aims to provide a communication terminal that can save power, can respond immediately to incoming calls, and can always perform reliable communication control.

[Means for Solving the Problems] The present invention provides a communication terminal that connects a line in response to an incoming call, controls a modem, and controls communication via a telephone line. A RAM that stores program data, a timer that outputs a power ON signal at a preset time, a power ON control that responds to the power ON signal from this timer, and a response that responds to the end of communication control. a control circuit that performs power OFF control, a program loading means that loads program data from an external storage device into RAM based on the power ON control by this control circuit, and a program loading means that loads program data into RAM from an external storage device based on the program data loaded into RAM upon receipt of a call. It has a communication control means for controlling communication.

[Function] In the present invention having such a configuration, when a preset time comes, the power is turned on by a power ON signal from the timer. Therefore, at this point, R
Program data is loaded into AM. After that, when there is an incoming call from the calling side, since the program loading has already been completed, the circuit can be connected immediately to respond to the calling side and to be able to control communication. Therefore, communication with the calling party can be ensured. Then, when communication control is completed, the power is turned off.
F controlled. Therefore, if you decide in advance the communication start time with the caller, you can turn on the power a little before that time (,
It is possible to save power.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, it is composed of a modem 11, a terminal main body 12, and a power supply control circuit 13.

The terminal main body 12 is connected to an AC power source 814 via a power supply control circuit 13 .

The modem 11 is connected to a telephone line, and when an incoming call is received, it outputs a C+ signal to the terminal body 12. The modem 11 also connects the communication terminal 1 when a line connection for communication is established under the control of the terminal main body 12.
2, a DR multiplied signal is output.

As shown in FIG. 2, the terminal main body 12 includes a CPU 21 constituting a control unit main body, a ROM 22 storing basic program data such as program loading, and a RAM 2 storing program data to be loaded.
3. A ■/○ port 25 to which a disk driver 24 for driving a floppy disk, which is an external storage device storing program data, is connected, an operation section controller 27 for controlling an operation section 26 equipped with key switches, etc., a printer, a display, etc. An I10 port 29 to which an output device 28 is connected is provided, and the CPU 21, ROM 22, and RAM
23, I10 port 25, and each controller 27, 29 are connected via a pass line 30.

As shown in FIG. 3, the power supply control circuit 13 includes a D-type flip 70 knob 31, a timer 32, and a transistor 33.
and a relay 34. The timer 32 is the fourth
As shown in the figure, when a preset time is reached, a power ON signal is output, and the flip-flop 31 is set to operate at the rising edge of the ON signal.

The flip 70 tube 31 turns on the transistor 33 with its set output.

The relay 34 is connected to the +Vc power supply via the transistor 33. A normally open contact 34m of this relay 34 is inserted in series with an inlet 35 for supplying power from the AC power source 14 to the terminal main body 12.

A power ON forced switch 36 is connected to the transistor 33 in parallel.

The flip 70 knob 31 is reset by a communication end signal END from the terminal main body 2.

As shown in FIG. 5, when the power is turned on, the CPU 21 of the terminal main body 12 drives the disk driver 24 to transfer program data from the floppy disk to the RAM 2.
Load to 3. When this loading is completed, a check is made to see if there is a C+ signal input from the modem 11, and if there is no C+ signal input, main processing based on input from the operating section 26, etc. is performed.

Furthermore, if there is a C1 signal, it is sent out as an ER multiplied signal ONL. Next, it is checked whether or not the DR multiplied signal is being inputted from the modem 11, and if it is not, it is determined that the line is abnormal and an error is generated, and the ER multiplied signal 0FFL and furthermore, the communication end signal END is sent. Further, if the DR double signal is input, the modem 11 is controlled to perform modem transmission, that is, communication control with the calling party via the telephone line. When this communication control is completed, an ER multiplication signal 0FFL and a communication end signal END are sent out.

In this embodiment with such a configuration, the communication start time is determined in advance with the calling side, and the timer 32 turns on the power a little before that time.
Set so that the N signal is generated.

As a result, when the set time comes, the timer 32 turns on the power.
A signal is generated and the flip-flop 31 is set. The set output of the flip-flop 31 turns on the transistor 33 and operates the relay 34. As a result, the normally open contact 34m of the relay 34 is closed, and the terminal main body 12 is connected to the AC power source 14.

When the power is turned on, the CPU 21 of the terminal body 12 controls the disk driver 24 to load program data from the floppy disk into the RAM 23.

Thereafter, at the appointed time, a call is received from the calling party, and the modem 11 outputs a Ci signal to the terminal body 12. The program data in the RAM 23 is already stored in the terminal body 12, so when the Ci signal is confirmed, the E
After transmitting the R-multiple signal and confirming the DR-multiple signal from the modem 11, the modem 11 is controlled to control communication with the calling party via the telephone line.

When the communication control is completed, the ER multiplier signal is turned off and a communication end signal END is output to the power supply control circuit 13. In the power supply control circuit 13, the end signal END resets the 7-lip 70 tube 31, which turns off the transistor 33 and stops the operation of the relay 34.

Thus, the normally open contact 34m of the relay 34 is opened, disconnecting the terminal main body 12 from the AC power supply 14.

In this way, shortly before communicating with the calling party, the terminal body 1
2 and loads the program data from the floppy disk into the RAM 23, so that when an incoming call is received from the calling party, it is possible to immediately respond and communicate. Therefore, there is no risk that the line will be disconnected on the calling side due to a slow response from this side.

In other words, communication can be performed reliably.

Further, since the power to the terminal main body 12 is turned on shortly before communication starts and turned off when communication is completed, it is turned on only when necessary, thereby saving power.

In addition, the power supply control circuit 13 is configured to turn off the power to the terminal body 12 only when it receives the communication end signal END from the terminal body 12, so even if a wrong call is simply received, communication cannot be performed normally. Therefore, there is no risk that the end signal END will not be sent and the power will be turned off by mistake.

In addition, when transmitting from here or when receiving urgently outside of the agreed time, turn on the power ON switch 36.
If this is operated, the relay 34 will be operated regardless of the operation of the transistor 33, so the terminal main body 12 will be forcibly connected to the AC power supply 14 and communication will be possible.

In the above embodiment, a floppy disk was used as the external storage device, but it is needless to say that the present invention is not limited to this.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a communication terminal that can save power, can immediately respond to incoming calls, and can always perform reliable communication control. It is something.

[Brief explanation of the drawing]

Figures 1 to 5 show embodiments of the present invention, with Figure 1 being an overall block diagram, Figure 2 being a block diagram showing the configuration of the terminal body, and Figure 3 being the configuration of the power supply control circuit. Figure 4 is a flowchart showing the timer operation, Figure 5 is a flowchart that does not show the control of the terminal itself, Figures 6 and 7 are conventional examples, and Figure 6 shows the overall The block diagram, FIG. 7, is a circuit diagram of the power supply control circuit. 11...Modem, 12...Terminal body, 13...
Power supply control circuit, 14... AC power supply, 21... CPU
, 22...ROM, 23...RAM, 24...disk driver, 31...flip-flop, 32
...Timer, 33...Transistor, 34...
relay. Applicant's agent Patent attorney Takehiko Suzue Figure 4 Figure 5

Claims (1)

[Claims] In a communication terminal that connects a line upon receiving a call, controls a modem, and controls communication via a telephone line.
A RAM that stores program data loaded from an external storage device that stores the program, a timer that outputs a power ON signal when a preset time comes, and a power supply that turns on the power in response to the power ON signal from this timer. Performs ON control and turns off the power in response to the end of communication control.
a control circuit that performs FF control; a program loading means that loads program data from the external storage device into the RAM based on power ON control by the control circuit; A communication terminal characterized by being provided with communication control means for controlling communication.