KR930000697B1 - Auto-alternate method and circuit of facsimile telegraph - Google Patents

Abstract

The circuit changes the mode of call automatically by detecting wheather the call is for facsimile mode or telephone one, and detecting the state of a hook switch even after it is changed to facsimile mode. The circuit includes a modem (10) for mod-demodulating the in/out signal from/to receiving port (Rx)/transmitting port (Tx), an analog switch (20) for being controlled to be connected to the Tx port or Rx port, a CPU (40) for controlling overall operation of the circuit, a voice data storing section (100), and an interfacing section (200).

Description

Automatic switching circuit of facsimile and its control method

1 is a conventional circuit diagram.

2 is a conventional flow chart.

3 is a circuit diagram according to the present invention.

4 is a flow chart according to the present invention.

* Explanation of symbols for main parts of the drawings

10: modem 20: analog switch

30: Transformer 40: CPU

100: voice data storage unit 20: input and output interface unit

K1-K7: Relay PT1, PT2: Photocoupler

R1: resistance

The present invention relates to an automatic switching circuit of a facsimile and a control method thereof. Particularly, in a facsimile with a built-in telephone, a circuit for automatically detecting whether a counterpart is a fax or a telephone upon reception and automatically switching to a line or a facsimile; The control method is related.

Currently, the facsimile machine is generally equipped with a built-in telephone, so that voice calls can be made by telephone together with transmission and reception of images.

1 is a conventional circuit diagram in which a common terminal COM is connected to a tip terminal T of a line T and R, and a normal close terminal NC is connected to a telephone connection terminal 101. FIG. The common terminal is connected to the ring terminal R of the relay K1 and the lines T and R which are connected and have a normal open terminal NO and driven by a first relay driving signal. COM) is connected, has a normal closed terminal (NC) and a normal open terminal (NO), the relay (K2) interlocked with the relay (K1) by the first relay drive signal, and the normal open of the relay (K1) The common terminal COM is connected to the terminal NO, has a normal closed terminal NC and a normal open terminal NO, and is driven by a second relay drive signal, and a relay K3 and a normal of the relay K1. It is connected between the open terminal NO and the normal open terminal NO of the relay K2 and driven by a third relay drive signal to transmit a dial pulse to the lines T and R. The coil L1 is connected between the relay K4, the telephone connection terminal 102 and the normal close terminal NC of the relay K2, and one end of the switch SW is connected to the power supply voltage Vcc. A relay K5 connected to the switch SW when the hook-off is magnetized by the coil L1 to “on” and outputting a first hook-off signal, and the other of the switch SW. The line is connected between the resistor R1 connected between the stage and the ground, the connection terminal 101 of the telephone and the normal closed terminal NC of the relay K2, and is connected between the power supply voltage Vcc side and the ground. A photo-coupler (PT1) for detecting a ring signal when the ring signal is input through (T, R) and outputting a ring detection signal, and input / output signals through the receiving terminal (RX) and the transmitting terminal (TX). A modem 10 to be modulated and demodulated, and connected to a transmitting terminal TX or a receiving terminal RX of the modem 10 by a switching control signal. An impedance matching transformer (30) connected between the switch (Analog Switch), the normal close terminal (NC) of the relay (K3) and the analog switch (20), CPU (Central Processing Unit) 40 for controlling the system as a whole, the relay (K1, K2, K3, K4, K5), photocoupler (PT1), analog switch 20, CPU 40 An input / output interface connected to the first and third relay driving signals and the switching control signal under the control of the CPU 40, and inputting the first hook-off signal and the ring detection signal to the CPU 40 Interface) 50.

2 is an operation flowchart of the CPU 40 of FIG. Referring to FIG. 1 and FIG. 2, the transfer to a conventional line or facsimile will be described as follows. When the power is "on" now, the CPU 40 of FIG. 1 detects whether a ring signal is detected in step (A1) of FIG. 2 and proceeds to step (A2) if a ring signal is detected for a predetermined time. Proceed to step (A7). At this time, when a ring signal is input from the other party through the lines T and R, the photo coupler PT1 is "on" by the ring signal, and the ring detection signal "high" is transmitted through the input / output interface unit 50 to the CPU 40. ) Is entered. Therefore, the CPU 40 proceeds to step A2 and determines whether the mode currently set is a manual reception mode. If the manual reception mode is a manual reception mode, the CPU 40 drives a bell driver not shown in step A3. Ring the bell (A4) and proceed to step. If the hookoff is not performed by searching whether the hookoff is performed in the step (A4), it is checked whether the first set time T1 is reached in the (A5) step. In this case, the first preset time T1 is a time set to limit the time during which the user picks up the handset from when the ringer sounds.

If the first set time T1 has not been reached in step (A5), the above-described step is repeated by looping to step (A3). When the user picks up the receiver in the above step (A4) and is hooked off within the first set time T1, the coil L1 is magnetized by the current flowing through the coil L1 of the relay K5 and the switch SW Is “on”. Therefore, the first hook-off signal is "high" is input to the CPU 40 through the input and output interface unit 50, the CPU 40 detects that the hook off, and proceeds to step (A6). When the user completes the call in step (A6), the hook-off signal by the relay K5 is input as “low”, so it is detected and terminated or the first relay driving signal is output by the user's document receiving key manipulation. The relays K1 and K2 are manually operated so that each common terminal COM is connected to the normal open terminal NO.

In addition, the switching control signal is output so that the analog switch 20 is connected to the transmission terminal TX of the modem 10. As a result, the circuit is switched to operate the facsimile, and the FAX signal is transmitted to the counterpart through the lines T and R. When the other party hears the fax signal and operates the document transmission key, the analog switch 20 is connected to the receiving terminal RX of the modem 10 by the switching control signal to receive the document. At this time, the fax signal is a signal defined by CCITT and means a signal meaning "Press the transmit key to send a document". In step (A6), when the call is terminated or the document reception is completed, the process proceeds to step (A7).

On the other hand, if it is determined that the mode currently set in step (A2) is not the manual reception mode, it is an automatic reception mode and proceeds to step (A9) to proceed to step A10 after a predetermined time delay. At this time, in step 9A, the predetermined time delay is required for setting up the modem 10 and detecting the next ring signal in preparation for receiving the document.

In step (A10), if it is detected that the ring signal is detected, if not detected, it proceeds to step (A11) and checks whether the second preset time T2 has been reached. At this time, if the second set time (T2) has not been reached, looping to the step (A10) to continue searching whether the ring signal is detected, and if the ring signal is not detected until the second set time (T2), the (A7) Proceed to step). The second set time T2 is a time set to limit a time for searching for detection of a ring signal.

When the ring signal is detected for a predetermined time in step (A10), that is, when the ring detection signal “high” is input from the photocoupler PT1, the process proceeds to step (A12) and outputs a first relay driving signal to relay. Drive (K1, K2). Therefore, since the common terminals COM are connected to the normal open terminals NO, the relay configurations K1 and K2 are changed in circuit configuration. That is, it is transferred from the line to the facsimile. In addition, in step (A13), the switching control signal is output so that the analog switch 20 is connected to the transmission terminal TX of the modem 10 so that the fax is operated. Send to the other party through (T, R).

When the other party hears the fax signal and manipulates a document transmission key, the analog switch 20 is connected to the receiving terminals R and X of the modem 10 by a switching control signal in step (A14). Receive. If the reception of the document is started, it is checked whether the reception is finished in step (A16). If not, the process loops to step (A15), repeats the above-described steps, and proceeds to step (A7). In step (A7), the analog switch 20 is returned to its original position, and in step (A8), the relays K1 and K2 are returned to the standby state.

As described above, the conventional method transmits a fax signal unconditionally regardless of whether the other party wants to make a telephone call in the automatic receiving mode. There was a problem that can not be detected.

Accordingly, an object of the present invention is to provide a facsimile with a built-in telephone, which automatically detects and switches whether a counterpart is a facsimile or a telephone during a receiving operation, and an automatic switching circuit capable of detecting the state of a hook switch even when the facsimile is switched. The control method is provided.

It is still another object of the present invention to provide an automatic transfer of a facsimile which can perform a voice response in an automatic transfer mode and a control method thereof.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a circuit diagram according to the present invention, which includes a modem 10, an analog switch 20, a transformer 30, a CPU 40, a relay K1-K5, a resistor R1, and a photocoupler PT1. Is the same as that of FIG. In addition, the common terminal COM is connected to the telephone connection terminal 101, the normal closed terminal NC is connected to the normal closed terminal NC of the relay K1, and is driven by a fourth relay driving signal. ), A common terminal (COM) is connected to the telephone connection terminal 102 and has a normal closed terminal (NC) and a normal open terminal (NO), the relay interlocked with the relay (K6) by the fourth relay drive signal (K7), connected between the power supply voltage (Vcc) and the ground and connected between the negative power supply terminal (VEE) and the normal open terminal (NO) of the relay (K7) hook switch (not shown) in the automatic transfer mode Photocoupler (PT2) for detecting the hook-off state and outputting the second hook-off signal, and the voice data stored by the voice response control signal in the automatic transfer mode connected to the modem (10). The output audio data storage unit 100, and the relay (K1-K7), photocoupler (PT1-P T2), analog switch 20, CPU 40, and voice data storage unit 100, and the control unit 1-1 under the control of the CPU 40; An input / output interface unit 200 for outputting the fourth relay driving signal, the switching control signal, and the voice response control signal to input the first and second hook-off signals and the ring detection signal to the CPU 40 is added. do. The voice data storage unit 100 of FIG. 3 may use a memory or a tape recorder that stores voice data and is output by a control signal.

4 is a flow chart according to the present invention, which detects whether a ring signal is detected and checks whether the currently set mode is a manual reception mode upon detection. When the hook-off is made within T1, the first step of disconnecting or receiving a document after the completion of the telephone call is completed, and if the mode currently set in the first step is not the manual receiving mode, the automatic receiving mode is checked. 2nd step of searching whether a ring signal is detected after a predetermined time delay, and if a ring signal is detected within the second set time T2, transferring the fax signal from a line to send a fax signal and receiving a document; If it is detected that the mode currently set is not the automatic receiving mode or the automatic switching mode, it detects whether the ring signal is detected. A third step of switching to a facsimile, retrieving the hook-off state and automatically switching to a line from the facsimile when the hook-off is detected within the first set time T1, and disconnecting or receiving a document after the telephone call is completed; If it is not hooked off within one set time (T1), it will be in a transmission state. If voice response is possible, send a voice data, and if it is possible to make a voice response, make it in a receiving state and send a fax signal within the third set time (T3). 4 is received when the document is received, and if the voice response is not possible in the fourth step, the reception state is confirmed after receiving a fax signal after receiving a fax signal. A fifth process of transmitting a pseudo ring back tone and searching for a hook-off state while making a transmission state and ringing a ring; and a first setting in the fifth process A sixth step of switching off from the facsimile to a line and ending or receiving a document after completion of the telephone call if the hook is off within the time T1; and a ring signal is not detected in the first step or the hookoff is made within the first set time T1 When the ring signal is not detected within the second preset time T2 in the second process or when the document reception is completed, when the ring signal is not detected in the third process, the second process is performed. When the fax signal is not received within the third setting time T3 or the document reception is completed, when the fax signal is not received within the third setting time T3 or the document reception is completed in the fourth step, the fifth step In the sixth step, when the hook-off is not performed within the first set time T1, when the document reception is completed in the sixth step, the analog switch and all the relays are reset to their original positions.

Hereinafter, operation examples of FIGS. 3 and 4 according to the present invention will be described in detail. When the power is "on" now, the CPU 40 of FIG. 3 detects whether the ring signal is detected in step (1) of FIG. 4, and if the ring signal is detected for a predetermined time, proceeds to step (2) and detects the ring signal. If not, proceed to step (7). At this time, when a ring signal is input from the other party through the lines T and R, the photo coupler PT1 is “on” by the ring signal and a ring detection signal “high” is transmitted through the input / output interface unit 200. It is input to 40. Therefore, the CPU 40 proceeds to step (2) to check whether the currently set mode is the manual reception mode, and if the manual reception mode (3) drives the bell driver not shown in step 3 to ring the bell (4). Proceed to step.

If the hookoff is not performed by searching whether the hookoff occurs in step (4), it is checked whether the first preset time T1 is reached in step (5). At this time, the first set time T1 is a time set to limit the time during which the user picks up the handset from the start of ringing. If the first set time T1 has not been reached in step (5), the above-described step is repeated by looping to step (3).

When the user lifts the handset and hooks it off within the first set time T1 in step (4), the coil L1 is magnetized by the current flowing through the coil L1 of the relay K5, and the switch SW Is “on”. Therefore, the first hookoff signal " high " is input to the CPU 40 through the input / output interface unit 200, and the CPU 40 detects that the hook is off and proceeds to step (6). In step (6), when the user completes the call, the hook-off signal by the relay K5 is inputted as “low”, so it is detected and terminated, or the first relay driving signal is output by the user's document receiving operation. The relays K1 and K2 are driven so that each common terminal COM is connected to the normal open terminal NC. In addition, the switching control signal is output so that the analog switch 20 is connected to the transmission terminal TX of the modem 10. Accordingly, the circuit is switched to operate the facsimile, and the fax signal is sent to the other party through the lines T and R. When the other party hears the fax signal and operates the document transmission key, the analog switch 20 is connected to the receiving terminal RX of the modem 10 by the switching control signal to receive the document. When the call is terminated or the document reception is completed in step (6), the process proceeds to step (7).

On the other hand, if the mode currently set in step (2) is not the manual reception mode, check whether the automatic reception mode in step (9), and if the automatic reception mode (10) proceeds to step 10 after a predetermined time delay (11). Perform. At this time, in step (10), a predetermined time delay is required for setting up of the modem 10 and detecting the next ring signal in preparation for receiving the document. In step 11, if it is detected that the ring signal is detected, if it is not detected, the process proceeds to step 12 to determine whether the second set time T2 has been reached. At this time, if the second set time T2 has not been reached, looping to step (11) continues to search for ring signal detection, and if the ring signal is not detected until the second set time T2, step (7) Proceed to The second set time T2 is a time set to limit the time for searching for detection of the ring signal.

When a ring signal is detected for a predetermined time in step (11), that is, when a ring detection signal “high” is input from the photocoupler PT1, the process proceeds to step (13) to output the first and fourth relay driving signals. To drive relays K1, K2, K6, and K7. Then, the circuit configuration of the relays K1, K2, K6, and K7 is changed so that each common terminal COM is connected to the normal open terminal NO. That is, it is transferred from the line to the facsimile. At this time, since the connection terminal 102 of the telephone is connected to the photocoupler PT2 by the driving of the relays K6 and K7, the hook-off state can be known as the photocoupler PT2 even in the state of being switched by facsimile.

When the state is switched to the facsimile as described above, the switching control signal is output in step 14 so that the analog switch 20 is connected to the transmission terminal TX of the modem 10 so as to be in a transmission state. In step), a fax signal is sent to the other party through the lines T and R. When the other party hears the fax signal and manipulates the document transmission key, the analog switch 20 is connected to the receiving terminal RX of the modem 10 by the switching control signal in step 16 to receive the document. . When the reception of the document is started, it is checked whether the reception is finished in step (17). If the reception is not completed, the loop loops to step (16), and the above-described steps are repeated. In step (7), the analog switch 20 is returned to its original position, and in step 8, the relays K1, K2, and K6 are reset to their initial positions, and the standby state is set.

On the other hand, in step (9), if it is not the current automatic reception mode, it is determined to be in the auto switching mode. In step (18), it is detected whether a ring signal is detected. At this time, if the ring signal is detected for a predetermined time, the first and fourth relay driving signals are output in step (19) to switch from the line to the facsimile as in step (13). In the step (20), if the hookoff state is detected and hooked off, the process proceeds to the step (21) and the call is terminated or the document is received as in the step (6). When the reception is completed, the process proceeds to step (7) to perform the above-described steps. At this time, even when the user is hooked off by picking up the receiver, as shown in the step (19), it can be detected as a photo coupler (PT2). That is, when the hook-off is turned on, the phone circuit (not shown) and the photocoupler PT2 are connected through the relay K7, so that the photocoupler PT2 is "on" by the applied negative power supply voltage VEE. Then, the second hook-off signal by the power supply voltage Vcc is input to the input / output interface unit 200 as “high” so that the CPU 40 detects this.

Therefore, even in the state in which the facsimile is switched in step (21), the telephone call is possible as in step (6), which is called an automatic transfer function. If the hookoff is not performed in the step (20), go to step (22) to check whether the first setting time (T1) is reached. If the first setting time (T1) is not reached, the process loops to the step (20). If it is determined whether the hook is off again, the process proceeds to step 23 if the hook off is not performed during the first preset time T1. In step (23), the switching control signal is output to connect the analog switch 20 to the transmission terminal TX of the modem 10 so as to be in a transmission state. In step 24, the voice response service (Service) Check if possible.

If the voice response is possible in step 24, proceed to step 25 to output a voice response signal and transmit the voice data stored in the voice data storage unit 100 to the counterpart via lines T and R. . In this case, the voice data refers to the voice data stored in advance in the voice data storage unit 100. For example, the voice data refers to data such as "I'm out of office, so please call or send a fax signal to send a document."

Thereafter, in step 26, the analog switch 20 is connected to the receiving terminal RX of the modem 10 by the switching control signal, and in step 26, signals input through the lines T and R are received. If it detects and analyzes a fax signal, it performs step 28 to receive a document. While receiving the document, search for receiving end in step 29 and if the reception is not completed, loop to step 28 to continue receiving the document, and when the reception is completed, proceed to step 7 to perform the above-described steps. After the standby state. If the fax signal is not received in step 27, proceed to step 30, and when the third set time T3 is reached, proceed to step 7 to perform the above-described steps and perform the third set time T3. ) Is the time set to limit the waiting time for receiving a fax signal after transmitting voice data in step (25).

On the other hand, if the voice response is not possible in step 24, the switching control signal is output in step 31 so that the analog switch 20 is connected to the receiving terminal RX of the modem 10 so that the reception state is reduced. After that, check the fax signal and reception in step (32). At this time, if a fax signal is received, the process proceeds to step 28 to perform the above-described steps. If the fax signal is not received in the step 32, the analog switch 20 is connected to the transmission terminal TX of the modem 10 by the switching control signal in step 33 to be in a transmission state. Proceed to step).

In step (34), while ringing at a predetermined period, the pseudo ringback tone is transmitted to the other party through the lines (T, R) and at the same time, it is checked whether the hook is off in step (35). At this time, if the hookoff is not performed, the first setting time T1 is checked by checking whether the first setting time T1 is reached in step 38. That is, if the hookoff is not performed during the first setting time T1, the step (7) is performed. In step (38), if the first set time T1 has not been reached, the process loops to step 31 to search for hook-off. When the user is hooked off by picking up the receiver in step (35), it detects this by the second hook-off signal output from the photocoupler PT2 and performs step 36. In step (36), the first and fourth relay driving signals are output to drive the relays K1, K2K6, and K7 to be transferred from the facsimile to the line, and the step (37) proceeds to step (6). After the telephone call is completed, the user disconnects or receives the document. When the document reception is completed, the process proceeds to step (7) to perform the above-described steps to initialize and enter the standby state.

As described above, the present invention provides a facsimile with a built-in telephone, which automatically detects whether the other party is a facsimile or a telephone during a receiving operation, automatically switches to a line or a facsimile, and performs a voice response in an automatic transfer mode. As a control method, it is possible to detect the state of the hook switch even when switched to the facsimile, and has the advantage of providing a voice response service.

Claims (2)

The modem 10 which modulates and demodulates the input / output signals through the receiving terminal RX and the transmitting terminal TX, and is connected to the transmitting terminal TX or the receiving terminal RX of the modem 10 by a switching control signal. Log switch 20, impedance matching transformer 30, CPU 40 for overall control of the system, and relays K1, which are connected to lines T and R and driven by a first relay drive signal, K2), the relay K3 driven by the second relay drive signal, the relay K5 and resistor R1 for detecting the state of the hook switch and outputting the first hook-off signal, and the ring signal input In a facsimile automatic switching circuit having a photo coupler (PT1) for outputting a ring detection signal, a common terminal (COM) is connected to the telephone connection terminal (101) and a normal closed terminal (NC) is connected to the relay (K1). Relay (K6) connected to the normal closed terminal (NC) of the drive and driven by the fourth relay drive signal The common terminal COM is connected to the telephone connection terminal 102, has a normal closed terminal NC and a normal open terminal NO, and relays K7 interlocked with the relay K6 by the fourth relay driving signal. And a second hook connected between the power supply voltage Vcc and the ground and connected between the negative power supply voltage VEE and the normal open terminal NO of the relay K7 to detect the hook-off state in the automatic switching mode. A photocoupler (PT2) for outputting an off signal, a voice response storage unit (100) connected to the modem (10) for outputting voice data stored by a voice response control signal in an automatic transfer mode, and the relay (K1-K7), photocoupler (PT1-PT2), analog switch 20, CPU 40, and voice data storage unit 100, which are controlled by control of the CPU 40, and the first to first. 4 Relay drive signal, switching control signal and voice response control signal are outputted and the first and second hook-off signals Automatic switching circuit of the facsimile, characterized in that consisting of input and output interface unit 200 for inputting a ring detection signal to the CPU (40). The modem 10 for demodulating and demodulating the input / output signals through the transmitting terminal TX of the receiving terminal RX, and is connected to the transmitting terminal TX or the receiving terminal RX of the modem 10 by a switching control signal. Log switch 20, Impedance matching transformer 30, CPU 40 for overall control of the system, Relay K1-K7, Photocoupler PT1, PT2, Voice data storage In the automatic switching control method of the facsimile having the 100 and the input / output interface unit 200, the method detects whether the ring signal is detected by the photocoupler and checks whether the mode currently set at the time of detection is the manual reception mode. In the manual reception mode, the first process of searching for a hook-off state when ringing and ringing and receiving a document after the completion of a telephone call when the hook-off is set within the first preset time T1; If the mode is not Manual Receive, In the automatic receiving mode, it checks whether the ring signal is detected after a predetermined time delay, and if the ring signal is detected within the second set time T2, transfers the fax signal from the line to the fax and receives the document. In the second process, and if the mode currently set in the second process is not the automatic receiving mode, the automatic switching mode is determined to detect whether the ring signal is detected, and if detected, transfers to a facsimile on the line and changes the hook-off state. A third step of retrieving and hooking up within the first set time T1 and automatically switching to a line from the facsimile and ending after a telephone call or receiving a document; and hooking off within the first set time T1 in the third step If not, check the status of transmission and check if voice response is possible. If voice response is possible, send voice data and then receive. A fourth step of receiving a document if a fax signal is received within the set time (T3); and if the voice response is not possible in the fourth step, the document is placed in a receiving state. Receiving a fax signal and transmitting a pseudo ringback tone while searching for a hook-off state while ringing within the first preset time T1 in the fifth process. A sixth step of switching from a facsimile to a line and ending a telephone call or receiving a document; and when the ring signal is not detected in the first step or the hook-off is not made within the first set time T1, the second step When the ring signal is not detected within the second set time T2 in the process or the document reception is completed, when the ring signal is not detected in the third process, the third set time T in the fourth process 3) When the fax signal is not received or the document reception is completed, when the fax signal is not received within the third set time (T3) or the document reception is completed in the fourth process, the first setting in the fifth process And a seventh step of initializing the analog switch and all the relays when the document reception is completed in the sixth step when the hookoff is not performed within the time T1.

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