JPH02250549A - Calling control system for facsimile equipment - Google Patents

Abstract

PURPOSE:To omit the need to perform the second internal setting task of a calling system for a setter by carrying out a calling job after selecting automatically the calling systems accepted by a connected switchboard. CONSTITUTION:A calling control system includes an MCL relay contact 1, a dial pulse(DP) calling circuit 2, a circuit transformer 3, an analog switch 4, a dial tone detecting circuit 5, a power-on reset circuit 6, a CML relay 7, a MODEM 8, a push-button dial DTMF calling circuit 9, a control circuit 10, a RAM 11, and a key pad 12. Then a calling mode to be accepted by a switchboard is automatically selected with the first calling action after a power supply is applied to a facsimile device. Hereafter the calling jobs are continuously carried out in the selected calling mode until the power supply is cut off. When the power supply is once cut off, an initial state of a DTMF calling job is reset. The the calling mode is automatically selected again with the first calling action after the next application of the power supply. Thus it is not required for a setter to set again an internal switch of the facsimile device.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a facsimile machine, and particularly to a call originating method using a push button dial signal sending method (hereinafter referred to as DTMF method) and a dial pulse signal sending method (hereinafter referred to as DP method). The present invention relates to a call control method for a facsimile machine that selects and makes a call.

(Prior Art) Conventionally, this type of facsimile machine uses DTM as the calling method.
It has a built-in switch for setting the calling method to decide whether to use the F method or the DP method, and when installing a facsimile machine, the installer JE had to set the switch.

(Problem to be Solved by the Invention) The calling method of the later facsimile machine described above is DTM.
Either the F method or the DP method is selected in advance. Therefore, if the calling method of the facsimile machine does not match the connected exchange, there is a drawback that the installer must reset the switch inside the machine.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks and to provide a call control method for a facsimile machine that automatically selects a call method accepted by a connected exchange and makes a call.

(Means for Solving the vA Problem) In order to achieve the above object, the call control system of the facsimile machine of the present invention incorporates an automatic calling circuit 9.2 for both the DTMF system and the DP system. After making a call using the DTMF method using a facsimile machine,
means 5 for detecting whether a dial tone continues to be transmitted from the exchange to which the device is connected;
5.2, 9. means for switching the calling method from the DTMF method to the DP method and making the call when the dial tone from the exchange continues to be sent after a predetermined period of time has elapsed after the calling; 5.2, 9. 10, when the dial tone from the exchange is interrupted during the predetermined period of time after making a call, the calling method used immediately before is memorized, and the calling method described above is stored until the power of the device is turned off. Means 5.2, 9.10 for making a call using the memorized calling method, and an initial stage for canceling the memory of the calling method and making a call using the DTMF method once the power of the device is cut off. The configuration includes means 6, 9 and 10 for returning to the state.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, a DP calling circuit 2 is a circuit that generates dial pulses for calling in the DP system.

The DTMF calling circuit 9 is a circuit that generates a DTMF signal for calling using the DTMF calling method.

The power-on reset circuit 6 is a circuit that outputs a power-on reset signal d to the control circuit 10 to initialize the control circuit 10 when the device is powered on.

The dial tone detection circuit 5 is a circuit that detects a dial tone output from a connected exchange and, when detected, outputs a dial tone detection signal to the control circuit IO.

The keypad 12 is mounted on the operating section of the device, and the operator enters the telephone number he or she wishes to call by pressing the keys on the keypad 12. The keypad 12 outputs information on keys pressed by the operator to the control circuit 10 as a numeric keypad information signal.

The constant speed access storage device (hereinafter referred to as RAM) 11 is
It is a random access memory that can be freely read and written by the control circuit 10, and includes a call code information storage area that stores the call mode, and a call code information storage area that stores the call mode, and a memory that can be manually pressed by the operator using the keypad 12. It consists of a telephone number storage area that stores nine calling telephone numbers.

The line connection terminal is connected to an exchange via a telephone line outside the device.

The control circuit 10 is constituted by a microcomputer, and an example of its operation is shown in the flowchart of FIG. 2, where the same symbols A, B, C,
It is assumed that D and E are connected to roots with the same symbol.

Next, the operation will be explained.

First, when the device is powered on, the power supply voltage Vcc connected to the power-on reset circuit 6 rises from zero volts to a specified voltage, and the power-on reset circuit 6 causes the control circuit 10 to perform a power-on reset. Outputs signal d. When the control circuit 10 detects the power-on reset signal d, it stores information @DTMF calling mode in the calling mode information storage area of RAMII via the data bus g. (Step 21 in FIG. 2) Next, when the operator presses a key on the keypad 12 to make a call using this device, the keypad 12 transmits the pressed key information to the control circuit 10. Output as numeric keypad information signal. (YES in step 22) The control circuit 10 uses RAM
The number of the pressed key is written in the telephone number storage area of II via data bus g. (Steps 23.24
).

When the control circuit 10 receives the numeric keypad information signal, it reads the information in the calling mode information storage area of the RAM 11 via the data bus g. (Steps 25 and 26) In this case, the information ``DTMF call mode'' stored when the power is turned on is read. (Step 28) When the CML relay drive signal C is turned on, the contact 1 of the CML relay operates, and the line transformer 3 is disconnected from the telephone connection terminal and connected to the line connection terminal. (Step 28) Next, the control circuit 10 turns on the analog switch control signal a to the analog switch 4. (Step 29) Then, the analog switch 4 operates, and the modem 8
The line transformer 3 connected to the DTMF calling circuit 9 is connected to the DTMF calling circuit 9.

Next, the control circuit 10 analyzes the numeric keypad information signal,
A DTMF calling control signal corresponding to the pressed key of the keypad 12 is output to the DTMF calling circuit 9. (Step 30.31) Then, the DTMF circuit 9 outputs a DTMF signal corresponding to the key pressed by the operator, and the DTMF signal is transmitted through the line transformer 3, the contact 1 of the QML relay, and the line connection terminal. It is sent out to a line not shown.

As long as the keypad 12 is pressed by the operator, a DTME signal is similarly sent to the line. (Step 32
, 30.31) After sending the DTMF signal, the control circuit 1O detects the dial tone detection signal, but if the dial tone detection signal is in the OFF state, the dial tone is no longer sent from the exchange until the DTMF signal is received by the exchange. Judging that, analog switch 4
In contrast, the analog switch switching control signal a is turned off, and facsimile communication is started. (Step 35.4
1) If the dial tone detection signal is on, the exchange does not accept the DTMF signal, so it is determined that the dial tone is still being output from the exchange,
In order to shift to DP calling, the control circuit turns off the analog switch switching control signal a to the analog switch 4, and disconnects the DTMF calling circuit 9 (step 34).
．． 36) Next, the control circuit 10 reads one digit of the telephone number to be called from the telephone number storage area of RAMII. (Step 37
) According to the read number, the control circuit 10 outputs a DP call origination control signal C to the DP call origination circuit 2. (Step 38) The DP calling circuit 2 generates a dial pulse according to the on/off state of the DP calling control signal C.

After completing the DP call for the first digit of the telephone number, the control circuit 10:
The second digit of the telephone number is read from the telephone number storage area of RAM II, and a DP call control signal C is output to the DP call origination circuit 2.

(Step 38) Similarly, a DP call is made for all digits of the telephone number stored in the telephone number storage area of RAMII. (Step 39) After the DP call is made for all digits, the control circuit 10 writes information @DP call mode in the call mode information storage area of RAMII, and shifts to facsimile communication. The call mode after (step 40.41) will be the DP call mode unless the power is turned off.

After facsimile communication, the control circuit 10 controls the CML relay 7
In contrast, the CML relay drive signal C is turned off, and the CM
L relay 7 is restored. (Step 42) In this way, a call mode is automatically selected in which the first call after the device is powered on is accepted by the exchange, and subsequent calls are made when the device is powered off. The call is made according to the calling mode until the call is made. Once the power is turned off, the system returns to the initial state of DPMF calling, and the next time the power is turned on and the first call is made, the calling mode is automatically selected again.

(Effects of the Invention) As explained above, the present invention makes the first call after the power is turned on using the DTMF method, and if the connected exchange does not accept the call, the call is automatically made. By making a call by analogy to the DP method, and then receiving the call at the exchange and making the call in the 9-call mode, you can use the conventional calling method without worrying about the functions of the connected exchange. This has the effect of eliminating the need for the installer to reconfigure the internal settings of the calling method if the values are different.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a flowchart showing an example of the operation of the control circuit shown in FIG. 1,... MCL relay contact 2... DP calling circuit 3... Line transformer 4... Analog switch 5... Dial tone detection circuit 6... Power-on reset circuit 7... CML relay 8--Modem 9-DTMF calling circuit 10--Control circuit U--RAM Hill-Keypad 1--Analog switch switching control signal b-Dial tone detection signal c-D P call control signal d-Power on Reset signal e-...CML relay drive signal f--DTMF call control signal g--Data bus h--Numeric keypad information signal Patent applicant: NEC Corporation Same as above NEC Engineering Co., Ltd.

Claims (1)

[Claims] In a facsimile machine that has a built-in automatic calling circuit for both the push-button dial signal sending method and the dial pulse signal sending method, after making a call using the push-button dial signal sending method, the device is connected. means for detecting whether a dial tone continues to be sent from the exchange, and a means for detecting whether the dial tone continues to be sent from the exchange for a predetermined period of time after the call is made; A means for making a call by switching from a push-button dial signal sending method to a dial pulse signal sending method, and a call made immediately before the dial tone from the exchange is interrupted during the predetermined period of time after making the call. means for storing a calling method and then making a call using the stored calling method until the device is powered off; and once the device is powered off, storing the calling method; 1. A call control system for a facsimile machine, comprising means for canceling the call and returning to an initial state in which calls are made using a push-button dial signal sending system.