JP3937967B2 - Communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication apparatus such as a facsimile that can be connected to a telephone.
[0002]
[Prior art]
FIG. 8 is a block diagram showing an NCU 200 used in a conventional facsimile apparatus FS11 to which a telephone can be connected.
[0003]
As shown in FIG. 8, the NCU 200 used in the conventional facsimile apparatus FS11 is provided with a dedicated DC power source 18 for detecting the off-hook of the telephone.
[0004]
That is, while the facsimile apparatus is capturing the line or while the facsimile apparatus FS11 is in the silent state, the telephone is disconnected from the line in order to eliminate the influence of the telephone. A dedicated DC power source 18 is provided to detect a telephone off-hook.
[0005]
Next, the operation of the conventional facsimile apparatus FS11 will be described.
[0006]
In a normal standby state, both the CML relay 12 and the H relay 16 are turned off, and the telephone connected to the terminals T1 / T2 is connected to the line connected to the L1 / L2. Accordingly, when the telephone is off-hooked, current flows from the line, and off-hook can be detected based on the output signal of the HOOK detector 15.
[0007]
However, during line acquisition, the CML relay 12 is turned ON, and the signal from the line is guided to the FAX through the transformer 13, so that the telephone set connected to the non-ringing setting (terminal T1 / T2 is connected by the CI signal) In order to prevent the telephone from ringing due to the ringing signal, the H relay 16 is turned on during standby, so that the telephone is disconnected from the line and a hook cannot be detected by the current from the line. .
[0008]
Therefore, in the facsimile machine FS11, a hook detection DC power source 18 is provided on the ON side of the H relay 16, and the hook state is detected by the current from the DC power source 18.
[0009]
However, in the conventional facsimile apparatus FS11, the DC power supply 18 is usually incorporated in the power supply unit, and the DC power supply 18 itself is a factor that increases the cost of the power supply unit. Further, in the conventional facsimile apparatus FS11, a cable and a connector are required to connect the power supply unit to the NCU (network control circuit unit), and man-hours for connecting these are necessary, which further increases the cost. There is a problem that.
[0010]
In order to eliminate these cost increase factors, a circuit for detecting a hook by using a current from a line even during line acquisition or in a standby state with no ringing has been proposed.
[0011]
[Problems to be solved by the invention]
However, in the conventional facsimile apparatus FS11, the DC power supply 18 is normally incorporated in the power supply unit, and the DC power supply 18 itself increases the cost of the power supply unit. Further, the power supply unit connects to the NCU (network control circuit unit). There is a problem that the cost is greatly increased due to the connectors to be connected and the man-hours required to connect them.
[0012]
For this reason, even when the line is being seized or during a stand-by with no ringing incoming call setting (setting that prevents the telephone connected to the terminal T1 / T2 from ringing by the CI signal), the current from the line is used to make a hook. The main purpose is to reduce the cost of the apparatus by performing detection.
[0013]
Furthermore, it is a further object of the present invention to eliminate the influence of a telephone during communication or dialing, which is caused by performing hook detection using a current from a line.
[0014]
Furthermore, it is a further object to detect a hook of a telephone while eliminating the influence of the telephone during communication or dialing, and reliably detect abandonment during the dialing operation.
[0015]
Furthermore, the present invention can reliably detect the hook state during off-hook dialing in a communication device that does not have a DC power supply dedicated to hook detection, and can dial from the FAX side while the telephone is off-hook, It is an object of the present invention to provide a communication apparatus that can eliminate erroneous dialing when a wrong telephone number is entered and a correct telephone number is input after the telephone is turned on or off hook.
[0016]
[Means for Solving the Problems]
  The present invention provides a communication device capable of dialing from a communication device side with a telephone connected and a handset off-hook, and a line disconnecting means for disconnecting the handset from a telephone line during dial transmission, and the telephone line A rectifying means for rectifying the line current supplied from the dial, and a hook state detecting means for detecting the hook state of the handset by connecting the handset to a telephone line and detecting the hook state of the handset by means of the line current between the dial transmission digits. The rectifying means, the hook state detecting means and the telephone are connected in series, and in a standby state, the telephone is connected to the telephone line via the rectifying means, thereby calling from the telephone line. It is a communication device characterized in that it prevents ringing of the telephone by a signal.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a block diagram showing an NCU 100 used in a facsimile apparatus FS1 according to an embodiment of the present invention.
[0022]
In the above embodiment, a facsimile apparatus will be described. However, the above embodiment may be applied to a communication apparatus other than a facsimile apparatus as long as it can connect a telephone.
[0023]
L1 / L2 is a terminal for connecting a telephone line, and T1 / T2 is a terminal for connecting a communication apparatus such as a telephone or a telephone handset to the facsimile apparatus FS1.
[0024]
The NCU 100 is a network control circuit used for the facsimile apparatus FS1, and includes a diode bridge 1, a P relay 2, a CML relay 3, a transformer 4, a 2-4 wire conversion circuit 5, and HOOK detectors 6, 8. An H relay 7, an H detection relay 9, and a CI detection circuit 10.
[0025]
The diode bridge 1 is a diode bridge that rectifies a signal from a telephone line connected to the terminals L1 / L2 and connects it to the H detection relay 9. Since the signal from the line is converted into a DC voltage by the bridge 1, even if the telephone line is connected to the telephone, the telephone does not ring by the calling signal. Further, since the diode bridge 1 is located closer to the telephone line terminal L1 / L2 than the CML relay 3, even if the CML relay 3 is in an off state (a state where the telephone line is disconnected from the facsimile apparatus FS1) Can be reliably detected by the line current when it is off-hook.
[0026]
The P relay 2 is a relay that transmits dial pulses. The CML relay 3 is a relay that captures or disconnects a line. The transformer 4 is a transformer that generates a DC loop, captures a line, and captures an AC component.
[0027]
The 2-4 line conversion circuit 5 is a circuit for converting the signal received through the transformer 4 to 2 lines to 4 lines, and is present in the facsimile apparatus FS1 via the 2-4 line conversion circuit 5 and is not shown. Signals can be transmitted and received between the modem and the line.
[0028]
The hook detector 6 is a hook detector that detects a hook state when both the CML relay 3 and the H relay 7 are OFF. The hook detector 6 uses the current from the telephone line L1 / L2 to perform hook detection. In this configuration, when the line current flows through the hook detector 6, it is possible to detect the off-hook of the telephone connected to the terminals T1 / T2.
[0029]
The H relay 7 is a relay for switching whether the telephone connected to T1 / T2 is connected to the line via the CML relay 3 or to the line via the H detection relay 9.
[0030]
The hook detector 8 is a hook detector that detects a hook when the H relay 7 and the H detection relay 9 are ON. The hook detector 8 uses the current from the telephone line L1 / L2 to perform hook detection. In this configuration, when the line current flows through the hook detector 8, it is possible to detect the off-hook of the telephone connected to the terminal T1 / T2.
[0031]
The H detection relay 9 is a relay that connects a signal that has passed through the diode bridge 1 to the H relay 7. The H detection relay 9 is a relay that switches whether or not to perform hook detection by the hook detector 8 when the H relay 7 is OFF. When the H detection relay 9 is off, hook detection by the line hook detector 8 is not performed.
[0032]
The CI detection circuit 10 is a detection circuit that detects a call signal from a line.
[0033]
The NCU 100 has a diode bridge 1 and an H detection relay 9 instead of the DC power source 18 shown in FIG. 8, and the current from the L1 / L2 terminal is supplied to the H bridge via the diode bridge 1 and the H detection relay 9. Supply to the ON side of the relay.
[0034]
With this configuration, as will be described later, the telephone connected to the terminal T1 / T2 does not ring even when a call signal is received.
[0035]
FIG. 2 is a block diagram showing the configuration of the facsimile apparatus FS1 according to one embodiment of the present invention.
[0036]
In FIG. 2, the NCU 100 is the same as the NCU 100 shown in FIG.
[0037]
The CPU 101 is a system control unit and controls the entire apparatus. The ROM 102 stores a control program for the CPU 101. The RAM 103 is composed of an SRAM or the like, and stores program control variables and the like. The transmission destination telephone number and e-mail address registered by the operator, various setting values, device management data, and various work buffers are also stored in the RAM 103.
[0038]
The storage memory 104 is configured by a DRAM or the like and stores image data. The external display unit 105 includes an LCD, an LED, and the like, and is used for notifying the user of display. The speaker 106 notifies or warns the user by voice and monitors the signal sound transmitted / received through the PSTN line 112, and has a built-in speaker control unit for turning on / off the speaker.
[0039]
The MODEM 107 performs modulation / demodulation of facsimile transmission / reception signals, and also has a function of generating a selection signal (tone dialer). Further, the MODEM 107 constitutes a communication unit (the CPU 101, the ROM 101, the RAM 103, the storage memory 104, etc. may be added to the communication unit as necessary). The pulse dial is generated by the P relay shown in FIG.
[0040]
The NCU 100 has a function of sending a selection signal (dial pulse or tone dialer) to the PSTN line (analog public line network) 112, and also performs an automatic incoming call operation by detecting a call signal. Further, the NCU 100 connects a telephone set 117 (which may be a telephone handset) through a T1 / T2 terminal shown in FIG. The NCU 101 turns on / off various relays according to instructions from the CPU 101 in accordance with the detected call signal and hook detection signal.
[0041]
The relay control unit 108 controls various relays shown in FIG. 109 is a CML relay driving unit that drives the CML relay, 110 is an H relay driving unit that drives the H relay, 111 is an H detection relay driving unit that drives the H detection relay, and 113 generates a dial pulse. This is a P relay drive unit that drives the P relay.
[0042]
The image processing unit 114 performs correction processing on the read image data and outputs high-definition image data. The scanner 115 includes a CS image sensor, a document transport mechanism, and the like, and optically reads a document and converts it into electrical image data. The operation unit 116 includes a keyboard, a touch panel, and the like, and is used by an operator to perform various input operations. Here, in addition to the operation unit for dialing, it is possible to set a ringing standby state, a non-ringing standby state, and an F / T switching mode, an automatic reception mode, a lead reception mode, etc. as modes for incoming calls.
[0043]
The printer formatter 118 analyzes a printer description language and converts it into image data when printing file data from an external device such as a PC or a workstation. The printer 119 is a device that records received images and file data on recording paper.
[0044]
Next, how to use the NCU 100 will be briefly described.
[0045]
The following operation is performed by the CPU 101 executing a program stored in the ROM 102. The CPU 101 controls the CML relay, the H relay, the H detection relay, and the P relay on / off by controlling the CML relay driving unit 109, the H relay driving unit 110, and the H detection relay driving unit 111 via the relay control unit 108. I do.
[0046]
3 and 4 are flowcharts showing control operations of various relays in the NCU 100.
[0047]
The CPU 101 determines whether or not the ringing standby state is set (S201). If the ringing standby state is set, both the CML relay 3 and the H relay 7 are turned off in the standby state (see FIG. 1). State of CML relay 3 and H relay 7 shown) (S202). Therefore, the line connected to L1 / L2 is directly connected to the telephone connected to the terminal T1 / T2, and when a call signal is received from the line (S205), the telephone 117 rings and is a manual incoming call (S206). If the telephone is off-hooked (S207), the H relay is turned off and the H detection relay is turned off (S208) while the CML relay is turned off, and a call becomes possible. The hook state of the telephone is monitored by the HOOK detector 6. When the end of the call is detected (S209), each relay is initialized and terminated (S210).
[0048]
Next, it is determined whether the non-ringing standby state is set (S203). If the non-ringing standby state is set, the CML relay 3 is OFF, the H relay 7, and the H detection relay 9 are ON in the standby state. (The state of the H relay 7 is connected to the HOOK detector 8 and the H detection relay 9, and the H detection relay 9 is connected to the diode bridge 1) (S204). The telephone is connected to the line via the diode bridge 1 and the H detection relay 9.
[0049]
In this circuit configuration, the signal from the line is rectified via the diode bridge 1 and a direct current is output. Therefore, when there is a call signal from the line, the telephone 117 does not ring, but the hook state of the telephone 117 can be known by the HOOK detector 8. When the CPU 101 detects that the user has taken off the telephone, the CML relay 3 and the H relay 7 are turned off, the H detection relay is turned off, and the line and the telephone are connected.
[0050]
Here, the non-ringing standby state can be set in the F / T switching mode and the automatic reception mode, and cannot be set in the manual incoming call mode.
[0051]
Next, if it is not in the manual incoming mode, it is in FAX / TEL mode (determines whether the incoming call is FAX or telephone, prompts the telephone to go off-hook if it is a telephone, and automatically receives FAX in the case of FAX) It is determined whether or not (S211).
[0052]
The CML relay 3 is turned on to capture the line, and both the H relay 7 and the H detection relay 9 are turned on (S212). Power is supplied to the telephone via the diode bridge 1. Therefore, the CPU 101 can detect the hook by the hook detector 8 (S213), but the influence of the telephone set on the line is not zero. Here, when an off-hook is detected, the CML relay 3 and the H relay 7 are turned OFF, the H detection relay 9 is turned OFF, the call is transferred, and when the call ends (S215), each relay is initialized and ended. (S216). When the CNG signal is detected without detecting the off-hook (S217), the H relay 7 is turned on, the H detection relay 9 is turned off (S218), and the process proceeds to communication.
[0053]
Here, since the H detection relay 9 is turned OFF during communication, the influence of the telephone can be surely eliminated.
[0054]
When not in the F / T switching mode, that is, in the case of automatic reception (when it is determined that the line is used for communication or the like), the CML relay 3 is turned on to capture the line, the H relay 7 is turned on, and the H detection relay 9 is turned off (S219), and the above-described various relay control units are controlled so that power supply via the diode bridge 1 is not performed. Therefore, the influence on the communication of the telephone 117 can be completely eliminated, but conversely, the hook situation of the telephone cannot be known.
[0055]
However, as mentioned above, even if a hook cannot be detected during communication, it is not important. This is because hook detection is required when the telephone connected to terminal T1 / T2 is meaninglessly off-hooked (S222) at the end of communication (S220) (S223). This is because of the degree. For this reason, it is sufficient to control the H detection relay driving unit 111 so as to turn on the H detection relay 9 (S221) and detect the hook state when it is determined that the communication is completed. When the telephone is on-hooked (S222), the process of step S216 is performed.
[0056]
If it is determined that the automatic call for FAX communication is made (224), the CML relay 3 is turned on to capture the line, the H relay 7 is turned on, the telephone is disconnected from the line, and the H detection relay 9 is turned off ( S225), power supply via the diode bridge 1 is not performed. Thereafter, a dial signal is sent out, but it is not necessary to detect a hook, so the CPU 101 does not detect the hook. Here, the reason for not detecting the hook is that the dialing operation cannot be abandoned in the middle by on-hooking the telephone connected to the terminal T1 / T2.
[0057]
However, if the telephone connected to T1 / T2 is off-hook and dialed from the FAX side (S226), and the user notices an input error after entering the telephone number, the user once returns the telephone and then again Go off-hook and enter the correct phone number. However, in the above configuration, since the hook state of the telephone connected to T1 / T2 cannot be detected during dialing, the CPU 101 on the apparatus side does not notice that it is on-hooked. Therefore, the telephone number that has been input incorrectly is dialed from the FAX side, and subsequently, the telephone number that the user has re-input is dialed from the FAX side.
[0058]
Since the exchange is connected to the telephone number dialed first, there is a problem that the telephone is connected to the telephone number dialed first even though the user dials again.
[0059]
Next, the off-hook dial operation in the above embodiment will be described.
[0060]
FIG. 5 is a flowchart showing the off-hook dialing operation in the above embodiment. This operation is executed by reading a program stored in the ROM 102 by the CPU 101. The CPU 101 controls the CML relay, the H relay, the H detection relay, and the P relay on / off by controlling the CML relay driving unit 109, the H relay driving unit 110, and the H detection relay driving unit 111 via the relay control unit 108. It is carried out.
[0061]
When the CPU 101 detects the hook state of the telephone 117 and determines that the off-hook dialing is started by the operation of the operation unit 116, in S301, the relay is initialized. Here, the CML relay 3 is turned ON, the line is captured, the P relay 2 is turned OFF, the signal can pass, the H relay 7 is turned ON, the telephone is disconnected from the line, and the H detection relay 9 is turned OFF. Then, it is set so that connection via the diode bridge 1 is not performed.
[0062]
In S302, one-digit dialing is performed. The dial sending method is well known and will not be described in detail. In the case of DTMF, the modem 107 sends out a DTMF signal. In the case of a pulse, the P relay 2 is turned on and then the CML relay 3 is turned on. After turning OFF and eliminating the influence of the transformer 4, the P relay 2 is turned OFF / ON to generate a pulse. After the desired number of pulses are generated, the CML relay 3 is turned on, the P relay 2 is turned off, and the transmission of the dial for one digit is finished.
[0063]
FIG. 6 is a timing chart showing the operation of the above embodiment.
[0064]
In S303, it is checked whether or not all the digits have been dialed. If all the digits have been dialed, the dialing process is terminated, and if the remaining digits have not yet been dialed, the process proceeds to Step S304. move on.
[0065]
In S304, it is checked whether it is an off-hook dial. For hooks other than off-hook dialing, hook detection is unnecessary and hook detection is not performed. In S306, after waiting for the inter-digit pause time, the process returns to step S302 to continue dialing. Here, the reason why the hook detection is not necessary except for the off-hook dial is to detect abandonment of the dial by detecting depression of a stop key (not shown) or key operation such as a hook key.
[0066]
If it is determined in S304 that it is an off-hook dial, it is checked in S305 whether a communication start instruction is received. In this embodiment, when the user presses the start key, it is determined that a communication start instruction has been received. When an instruction to start communication is received, the dial transmission operation is subsequently stopped by a stop key (not shown) of the operation unit 116, so that a telephone hook is not detected. For this reason, in S306, it waits for the pause time between digits, and then returns to step S302 to continue dialing.
[0067]
If it is determined in S305 that an instruction to start communication has not been received, in S307, the H detection relay 9 is turned on so that a hook can be detected. Thereafter, in S309, the HOOK1 signal is checked. Here, if it is an off-hook state, in S310, the H detection relay 9 is turned off, it returns to S302, and dialing is continued.
[0068]
If it is determined in S309 that the device is in the on-hook state, in S311, a wait is performed for an arbitrary time. In this embodiment, it is assumed that this arbitrary time is 500 ms. In S312, it is checked whether or not on-hook has been confirmed. In this embodiment, the hook determination is executed by a task different from the dial, and the dial execution task refers to the determination result and controls it. A method for determining the hook will be described later.
[0069]
In S312, if it is determined that the on-hook has been confirmed, the dial processing is terminated. If it is determined that the on-hook is not authorized, the process returns to S309 and the HOOK1 signal is checked again. Thereafter, the loop of S309 to S312 is repeated until the on-hook is confirmed or the HOOK1 signal returns to the off-hook state.
[0070]
The above is the operation of the dial processing in the above embodiment.
[0071]
Next, the hook determination process in the above embodiment will be described.
[0072]
FIG. 7 is a flowchart of the hook determination processing operation in the above embodiment. This operation is executed by reading a program stored in the ROM 102 by the CPU 101.
[0073]
The hook determination process is performed by a periodic task having a 1 ms period, and variables are initialized before the process is started.
[0074]
The variables used in this embodiment are a variable Result for storing a hook result, an ON timer for certifying on-hook, and an OFF timer for certifying off-hook. The variable Result is initialized by ON, and the ON timer is Initialized at 2200, the OFF timer is initialized at 200. In other words, since this process is performed at a cycle of 1 ms, on-hook certification is executed in 2.2 s and off-hook certification is executed in 0.2 s.
[0075]
First, in S401, it is checked whether or not the H relay 7 is ON. If it is ON, in S402, it is checked whether or not the H detection relay 9 is ON. If the H detection relay 9 is ON, power is supplied to the telephone from the line via the diode bridge 1 → H detection relay 9 → H relay 7, and the HOOK detector 8 can detect the hook. Therefore, in S404, the HOOK1 signal is read, and the process proceeds to step S406.
[0076]
If it is detected in S402 that the H detection relay 9 is OFF, hook detection cannot be performed, and the hook determination process ends. At this time, since the variables such as the hook result are not updated, the result when the hook detection is possible is taken over.
[0077]
If the H relay 7 is OFF in S401, it is checked in S403 whether the CML relay 3 is OFF. If the CML relay 3 is OFF, the CML relay 3 → H relay 7 is connected from the line. Since the power is supplied to the telephone, the HOOK detector 6 can detect the power.
[0078]
Therefore, in S405, the HOOK2 signal is read, and the process proceeds to step S406. In S403, if it is detected that the CML relay 3 is ON, hook detection is impossible, so the hook determination process is terminated. At this time, variables such as the hook result are not updated, so hook detection is possible. Take over the results when it was.
[0079]
In S406, it is determined whether the hook result read in step S404 or S405 is ON or OFF. If the hook result is ON, in S407, it is checked whether or not the previous reading result is ON. If the previous time is also ON, the value of the ON timer is checked in S410. If the value of the ON timer is larger than 0, 1 is subtracted in S413. In S415, it is checked whether or not the subtraction result is 0. If the subtraction result is 0, ON is written in the variable Result in S417.
[0080]
In S410, if the value of the ON timer is 0, ON is already written in the variable Result, and the process ends without performing the subsequent processing. In S415, if the value of the ON timer is larger than 0, it is in the middle of authorization, so the process is terminated without updating the variable Result.
[0081]
In S407, if the previous time is not ON, the current time has changed from OFF to ON. Therefore, in order to start the ON test, in S409, the initial value 2200 is written in the ON timer, and the process ends.
[0082]
As described above, when the result of the HOOK1 signal or the HOOK2 signal changes from OFF to ON and remains ON for 2200 ms, it is recognized as on-hook and the variable Result is updated to ON. . In other cases, the variable Result is not updated.
[0083]
Similarly to the above, when it is determined that the off-hook authorization is OFF in S406, in S408, it is checked whether or not the previous reading result is OFF. If the previous reading is also OFF, in S411, the OFF timer If the OFF timer value is larger than 0, 1 is subtracted by 1 in S414.
[0084]
If the subtraction result is 0 in S416, OFF is written in the variable Result in S418. In S411, if it is determined that the value of the OFF timer is 0, since OFF is already written in the variable Result, the process is terminated without performing the subsequent processing.
[0085]
In S416, if it is determined that the value of the OFF timer is greater than 0, the process is terminated without updating the variable Result because the authorization is in progress.
[0086]
Also, if it is determined in S408 that the previous time is not OFF, this time has changed from ON to OFF, so in order to start OFF verification, in S412, the initial value of 200 is written in the OFF timer, and the process ends. To do.
[0087]
The above operation is hook determination processing.
[0088]
In S312 of the dial processing flow shown in FIG. 5, the variable Result is read to determine whether or not dialing is possible.
[0089]
According to the above embodiment, in off-hook dialing, the H detection relay is turned off during dial transmission to eliminate the influence of the telephone, and the H detection relay is turned on between dial digits to detect the hook state of the telephone. It is.
[0090]
Moreover, since the time between digits of the dial is very short, it is difficult to reliably determine on-hook. For example, according to the technical data of NTT, the separation time of the disconnection signal is 0.3 s or more when hooking is not allowed, and 2.2 s or more when hooking is allowed, but the interdigit pause time in the case of DTMF is It is only about several tens to one hundred and several tens of ms, and even pulse dialing is about several hundred ms.
[0091]
Therefore, in the above embodiment, when an on-hook state is detected between dial digits, a sufficient hook detection time is obtained by delaying transmission of the next digit, and the accuracy of hook detection is improved. .
[0092]
In addition, when the user instructs fax transmission by pressing the start key after entering the dial in the off-hook state, the user usually returns immediately to the telephone, so that the dialing may end in the middle and the fax transmission may not be performed. is there. Therefore, in the above-described embodiment, when receiving an instruction to start transmission from the user, the utility is further enhanced by preventing hook detection between digits.
[0098]
【The invention's effect】
  According to the present invention,If no ringing incoming call is set, incoming calls can be made without ringing the phone by rectifying the incoming signal, and if the phone goes off-hook, it can be reliably detected even when hook detection is performed by line current. There is an effect.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an NCU 100 used in a facsimile apparatus FS1 according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a facsimile machine FS1 according to an embodiment of the present invention.
FIG. 3 is a flowchart showing control operations of various relays.
FIG. 4 is a flowchart showing control operations of various relays.
FIG. 5 is a flowchart showing an off-hook dialing operation in the embodiment.
FIG. 6 is a timing chart showing the operation of the embodiment.
FIG. 7 is a flowchart of a hook determination processing operation in the embodiment.
FIG. 8 is a block diagram showing an NCU 200 used in a conventional facsimile apparatus FS11 to which a telephone can be connected.
[Explanation of symbols]
100 ... NCU used in the facsimile apparatus FS1 of the embodiment,
FS1 ... facsimile machine,
1 ... Diode bridge,
2 ... P relay,
3 ... CML relay,
4 ... Trance,
5 ... 2-4 wire conversion circuit,
6, 8 ... HOOK detector,
7 ... H relay,
9 ... H detection relay,
10: CI detection circuit.

Claims (14)

In a communication device capable of dialing from the communication device side with the telephone connected and the handset off-hook,
A line disconnecting means for disconnecting the handset from the telephone line during dial transmission;
Rectifying means for rectifying the line current supplied from the telephone line;
Hook state detecting means for connecting the handset to a telephone line and detecting the hook state of the handset by line current between dial transmission digits;
Have
The rectifying means, the hook state detecting means and the telephone are connected in series,
A communication apparatus characterized in that, in a standby state, the telephone is ringed by a call signal from the telephone line by connecting the telephone and the telephone line via the rectifying means . In claim 1,
The communication apparatus according to claim 1, wherein the hook state detection means includes a stop means for stopping transmission of the next digit when it is determined that the handset is in an on-hook state between digits. In claim 1,
The hook state detecting means is
Digit transmission delay means for delaying transmission of the next digit when it is detected that the handset is in an on-hook state between digits;
A dial interruption means for interrupting the dial when the on-hook state continues continuously for an arbitrarily specified on-hook determination time;
Dial processing continuation means for continuing the dial processing when returning to the off-hook state before the on-hook determination time elapses;
A communication apparatus, characterized by comprising: In any one of Claims 1-3,
The hook state detection means is a means that, when receiving a communication start instruction from a user before dialing, does not perform hook monitoring between the digits after receiving the communication start instruction. Communication device. In communication equipment,
Connecting means for connecting a telephone through the communication device;
First switch means for switching a communication unit of the communication device and the telephone to connect a telephone line;
Rectifying means for rectifying the line current supplied from the telephone line;
Hook detecting means connected to the telephone line without going through the first switch means and detecting a hook state of the telephone by a current supplied from the telephone line;
Second switch means for allowing current in the telephone line to flow through the telephone and the hook detection means when the telephone is off-hook;
Have
The rectifying means, the hook detecting means and the connecting means are connected in series,
In a standby state, the first switch means disconnects the communication unit of the communication device and the telephone line, and the second switch means connects the telephone and the telephone line via the rectifying means. By connecting, the ringing of the telephone by the calling signal from the telephone line is prevented,
When dialing out by the communication unit of the communication device, the communication unit of the communication device and the telephone line are connected by the first switch means, and the telephone and the telephone line are connected by the second switch means. A communication device characterized by disconnecting. In communication equipment,
Connecting means for connecting a telephone through the communication device;
First switch means for switching a communication unit of the communication device and the telephone to connect a telephone line;
Rectifying means for rectifying the line current supplied from the telephone line;
Hook detecting means connected to the telephone line without going through the first switch means and detecting a hook state of the telephone by a current supplied from the telephone line;
Second switch means for allowing current in the telephone line to flow through the telephone and the hook detection means when the telephone is off-hook;
Have
The rectifying means, the hook detecting means and the connecting means are connected in series,
In a standby state, the first switch means disconnects the communication unit of the communication device and the telephone line, and the second switch means connects the telephone and the telephone line via the rectifying means. By connecting, the ringing of the telephone by the calling signal from the telephone line is prevented,
When the communication unit of the communication device determines whether the incoming call is a FAX or a telephone, the communication unit of the communication device is connected to the telephone line by the first switch unit, and the second switch unit is connected. A communication apparatus, characterized in that the telephone and the telephone line are connected with each other. In communication equipment,
Connecting means for connecting a telephone through the communication device;
First switch means for switching a communication unit of the communication device and the telephone to connect a telephone line;
Rectifying means for rectifying the line current supplied from the telephone line;
Hook detecting means connected to the telephone line without going through the first switch means and detecting a hook state of the telephone by a current supplied from the telephone line;
Second switch means for allowing current in the telephone line to flow through the telephone and the hook detection means when the telephone is off-hook;
Have
The rectifying means, the hook detecting means and the connecting means are connected in series,
In a standby state, the first switch means disconnects the communication unit of the communication device and the telephone line, and the second switch means connects the telephone and the telephone line via the rectifying means. The communication apparatus is characterized in that the telephone is not ringed by a call signal from the telephone line. In claim 5,
During dial transmission, the telephone and the telephone line are disconnected by the second switch means, and between the digits in the dial sender, the telephone and the telephone line are connected by the second switch means. A communication apparatus for detecting a hook state by a detecting means. In claim 8,
A dialing device is stopped when an on-hook of the telephone is detected by the hook detecting means. In any one of Claims 5-9,
The communication apparatus according to claim 1, wherein the second switch means is connected to the telephone line side more than the first switch means. In any one of Claims 5-10,
Second hook detecting means connected to the telephone line via the first switch means and detecting a hook state of the telephone by a current supplied from the telephone line;
Third switch means for allowing current of the telephone line to flow through the telephone and the second hook detection means when the telephone is off-hook;
In a ringing standby state in which the telephone is ringed in response to an incoming signal, the communication unit of the communication device is disconnected from the telephone line by the first switch means, and the telephone is connected by the second switch means. And the telephone line are disconnected, the telephone is connected to the telephone line by the third switch means, and the telephone is ringed by a call signal from the telephone line. In any one of Claims 5-11,
In a state in which a line is used for communication, the communication device and the telephone line are connected by the first switch means, and the telephone and the telephone line are disconnected by the second switch means. A communication device. In claim 12,
When communication is completed, the communication device is characterized in that the second switch means connects the telephone and the telephone line, and the hook detection means detects the hook state of the telephone. In communication equipment,
Connecting means for connecting a telephone through the communication device;
First switch means for switching a communication unit of the communication device and the telephone to connect a telephone line;
Hook detecting means connected to the telephone line without going through the first switch means and detecting a hook state of the telephone by a current supplied from the telephone line;
Second switch means for allowing current in the telephone line to flow through the telephone and the hook detection means when the telephone is off-hook;
Determining means for determining the state of the communication device;
Control means for controlling the first switch means and the second switch means in accordance with the determination result of the determination means;
Second hook detecting means connected to the telephone line via the first switch means and detecting a hook state of the telephone by current supplied from the telephone line;
Third switch means for allowing current of the telephone line to flow through the telephone and the second hook detection means when the telephone is off-hook;
The control means is means for controlling the first switch means, the second switch means, and the third switch means in accordance with a determination result of the determination means. A communication device.

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