JPH05347695A - Network controller and facsimile equipment - Google Patents

Abstract

PURPOSE:To receive a reply from a called station quickly by discriminating as a reply from the called station when a succeeding call tone is not inputted in a predicted timing in the network controller calculating a call tone time interval at dialing and predicting an input timing of a succeeding call tone. CONSTITUTION:The facsimile equipment is provided with a network controller NCU 8, a recording section 5 of the NCU 8 records a received image or an image at the time of original copying and a read section 6 reads the original image. Then the NCU 8 is provided with a hook relay 22 of a telephone set 10, an off-hook detection circuit 23, a relay 24 switching a line 9 to the telephone set 10 or a MODEM 7, a choke coil 25 to catch the line 9, a DC cut capacitor 26 and an audio transformer 27 to isolate the line 9 and the MODEM 7 to detect a call tone between the line 9 and the telephone set 10 by using a call tone detection circuit 28. Then the NCU 8 calculates the call tone time interval at the time of dialing to predict the input timing of a succeeding call tone. When the input of the succeeding call tone through the prediction is lost, it is discriminated as the reply by the called station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network control unit (NCU) usable for an information processing apparatus having a facsimile machine and a data modem, and also for an answering machine.

[0002]

2. Description of the Related Art For example, in an NCU of a conventional facsimile machine, in the case of automatic transmission, CCITT T.S.T. The T1 timer specified in No. 30 is started and the CNG signal is transmitted, the DIS signal from the called station and the T1 timer are monitored, and the DI from the called station
When the S signal is received, the facsimile protocol is started, and when the T1 timer times out without receiving the DIS signal from the called station, the line is disconnected.

Further, even when a ringing tone is detected at the called station during automatic calling of an answering machine or the like, after detecting this ringing tone, a timer for waiting for detection of the next ringing tone times out. When the timeout is detected, the response of the called station is recognized.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When detecting an IS signal, the CCITT T.264 signal is used. In the case of 30, since the T1 timeout is specified from the incoming call of the called station, the time of the T1 timeout is actually set to the time specified to the PTT, for example, 60 seconds, not 35 seconds specified to CCITT. is doing.

Further, when the ringing tone is detected, the pattern of the ringing tone differs depending on the exchange. Therefore, the timeout time is set in accordance with the ringing tone having a long interval, which is a long setting. There is.

As described above, the conventional apparatus has a drawback in that it is necessary to set a long time in the timer for detecting the response of the called station, and when there is no response, it is not possible to quickly respond. ..

It is an object of the present invention to provide an NCU which can deal with various patterns of ringing tones, can quickly detect the response of the called station at the time of calling, and can efficiently perform the subsequent processing. To do.

[0008]

According to the present invention, a detecting means for detecting a ringing tone, a clocking means for measuring a timing pattern of the ringing tone, and a subsequent ringing tone are different from the pattern expected by the clocking means. It is characterized by having control means for recognizing that the receiving side has responded when the timing comes.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a facsimile apparatus equipped with the NCU of the present invention.

The CPU 1 is composed of a microprocessor and controls the operation of the entire apparatus according to a program stored in the ROM 2. The RAM 3 is used as a work area for the CPU 1. The contents stored in the SRAM 4 are backed up even when the main power is turned off.

The recording unit 5 is composed of a thermal recording head, a recording paper conveying system, and the like, and records an image to be received or an image when a document is copied. The reading unit 6 is composed of a CCD line sensor, a document feeding system, and the like, and reads a document image.

The modem 7 is for modulating / demodulating communication image data and the like, and the NCU 8 is for selectively connecting the telephone line 9 to the modem 7 or the telephone 10.

The operation unit 11 has ten keys, function keys, etc., and is used for various inputs.
Is composed of an LCD or the like, and displays the current time and the operating state.

FIG. 2 is a circuit diagram showing the configuration of the NCU 8.

The NCU 8 has a hook relay 22 of the telephone 10, an off-hook detection circuit 23, and a relay (CML) 24 for switching the line 9 to the telephone 10 or the modem 7.
A choke coil 25 for capturing the line 9, a direct current cut capacitor 26, an audio transformer 27 for separating the line 9 side and the modem 7 side, and a ringing tone between the line 9 and the telephone 10. And a ringing tone detection circuit 28 for detecting.

In this NCU 8, at the time of calling, the ringing tone detection circuit 28 detects the ringing tone and measures the interval of this ringing tone to predict the input timing of the next ringing tone. If no ring tone is entered,
Judged as the response from the called station.

FIG. 3 is a schematic diagram for explaining the operation in this case.

FIG. 3A shows the result of detecting the received ring back tone and its interval by the timer, and FIG.
Shows the ringing tone expected from the detection result of (A) and its interval time.

That is, in FIG.
RT1 is a timer value that detects the first ring back tone, and RT1 is a timer value that detects the second ring back tone. Also, RT0 '
Is a timer value that detects the interval between the first ringing sound and the second ringing sound, and RT1 ′ is a timer value that detects the interval between the second ringing sound and the third ringing sound. Then, based on these timer values, the expected timer value rt0 of the ringing tone and the expected timer value rt1 of the interval shown in FIG.

FIG. 4 is a flow chart showing the operation of this embodiment.

The monitoring of the ringing tone as described above is usually processed by timer interruption by hardware at regular intervals. Therefore, the time can be measured by the number of times of interruption. Therefore, when the ring tone is detected (S
1), the time of the first ringing tone is counted, and the result is R
It is stored in the memory for T0 (S2). Next, the interval time from the end of the first ringing tone to the detection of the second ringing tone is counted, and the result is stored in the memory for RT0 '(S
3). Further, the time of the second ringing tone is counted, the result is stored in the memory for RT1 (S4), then the interval time from the end of the second ringing tone to the detection of the third ringing tone is counted, and the result is obtained. Is stored in the memory for RT1 '(S5).

Then, the expected timer values rt0 and rt1 are determined based on the data stored in each memory. here,
In a general public line, the ringing tone is 1 second and the interval is 2 seconds. Therefore, RT0 = RT1 = rt0 is normally set.
= 1 second, RT0 '= RT1' = rt1 = 2 seconds.

In this embodiment, two ringing tones and an interval are detected to detect the ringing tone, but this is because the first ringing tone corresponds to the original time due to the specifications of the exchange. Is. If there is a difference between the above timer values, the operation from S2 is repeated again to obtain a regular ringing pattern (S1).
4).

Next, after storing the expected timer values rt0 and rt1 thus determined in the memory (S6, S
7) The subsequent ringing tone and interval are detected (S8, S9), and if the ringing tone is shorter than the expected timer value rt0 and if the interval is longer than the expected timer value rt1, the called station responds. Recognize and CCITT T1
The timer is started (S11). This allows the T1 timer to function as the original T1 timer.

If the stop button is pressed while receiving the ringing tone (S10), the process proceeds to that process (S12). Furthermore, if the called station does not respond, P
If the TT time-out occurs (S13), the line on the own device side is disconnected and the process ends (S15).

In the above embodiment, the ring tone pattern is detected by the hardware timer interrupt.
The present invention is not limited to this, and it may be detected by a loop count by software, for example.

In the above embodiment, the ring back tone is detected by the ring back tone detection circuit. However, the present invention is not limited to this, and the ring back tone may be detected by the tone detection function of the modem.

Further, in the above embodiment, an example in which the present invention is installed in a facsimile machine is shown, but besides this, it can be widely applied to a data communication device, a multifunction telephone and the like.

Next, a facsimile apparatus according to another embodiment of the present invention will be described.

FIG. 5 shows a facsimile machine 1 of this embodiment.
3 is a block diagram showing a state in which 03 and a telephone set 102 are connected in parallel to one telephone line 101. FIG.

Conventionally, in a facsimile apparatus connected in parallel with a telephone set, when an incoming call from the facsimile apparatus of the other party is received by the telephone set, first the manual reception operation of the facsimile apparatus is performed, and then the receiver of the telephone set is placed. Action was needed. For this reason, the operation procedure is very complicated, and reception is often unsuccessful unless operated promptly, and there is a high possibility that the manual reception operation will not be in time, especially when the telephone and the facsimile device are separated. ..

Therefore, in this embodiment, by providing a voltage detection circuit for the telephone line, a CNG monitoring function of the facsimile apparatus, and a message sending function to the telephone line, the facsimile incoming call is received by the telephones connected in parallel. Even in this case, the facsimile device can automatically receive the data.

FIG. 6 is a block diagram showing the structure of the facsimile apparatus 103.

The facsimile apparatus 103 is a central processing unit for controlling the entire apparatus, and a display apparatus 211 for displaying various information such as line usage and telephone numbers.
And an RO storing the control program of the CPU 210
An M212, a RAM 213 used as a work area of the CPU 210, a modem 214 that modulates / demodulates transmitted / received data, and an input device 215 that allows an operator to perform various key inputs such as facsimile settings, start / stop, and telephone number input. ..

Further, a relay driver 216, which is a drive circuit for the relay, and a dialer 21 for making a dial call.
7 and a CNG detection circuit 218 for detecting the CNG signal from the transmitting facsimile with the DC circuit open.
A telephone line voltage detection circuit 219 for detecting an off-hook state of the telephone set 102, a ringer drive circuit 220 for detecting a call signal by the call signal detection circuit to ring the voltage buzzer 221 and a dial pulse. Dial pulse sending circuit 222, call circuit 223 for making a call, and handset 22 for making a call
4 and a speaker 225 for monitoring the sound of the telephone line
Have and.

Further, transformers 226 and 232 for insulating the telephone line, an operational amplifier 227 for amplifying a received signal, an operational amplifier 228 for amplifying a signal to be transmitted, and a direct current component of the telephone line are cut. Capacitors 229 and 233, a choke coil 230 for flowing a direct current component of the telephone line, a relay 231 for switching the telephone line, an amplifier 234 for amplifying the sound of the telephone line, and connection of the telephone line. It has a disconnection switch and a hook switch 235 for detecting an on-hook state and an off-hook state of the handset, and a voice synthesis circuit 236 for generating a voice message.

FIG. 7 is a flow chart showing an operation example of this embodiment.

The operation shown in FIG. 7 is an operation in the state where the facsimile apparatus is set to the manual reception.
When the call signal detection circuit in the ringer driving circuit 220 detects the call signal (S50) and the telephone line voltage detection circuit 219 detects the off-hook of the telephone (S51), the CNG signal from the transmission side is CNG.
The detection circuit 218 monitors for a certain period of time, and when this CNG signal is detected (S52), the relay 231 turns into the transformer 2
26, and the DC circuit is closed (S53). And
The voice synthesizing circuit 236 sends, for example, a message "Incoming call from facsimile, please leave the handset" to the telephone line (S54). After that, facsimile reception is performed (S55), the relay 231 is tilted to the transformer 232 side, and the DC circuit is opened (S56).

When the CNG signal is not detected in S52, the line in use is displayed on the display device 211 (S57). After that, when the telephone line voltage detection circuit 219 detects the on-hook of the telephone (S58), the line busy display of the display device 211 is erased (S59).

As described above, in the present embodiment, when the telephone receives an incoming call from the partner facsimile machine,
The user of the telephone can perform proper facsimile reception simply by placing the handset according to the message in S54 described above.

FIG. 8 shows, as a modification of the present invention, a telephone 104 instead of the facsimile apparatus 103 and a line 10.
FIG. 3 is a block diagram showing a state in which it is connected to 1 in parallel.

FIG. 9 is a block diagram showing the configuration of the telephone 104.

The telephone 104 is a central processing unit for controlling the entire device, a CPU 70, a display device 71 for displaying various information such as line usage and telephone numbers, and the above-mentioned C.
ROM 72 storing a control program for the PU 70, and RAM 7 used as a work area for the CPU 70.
3 and a hold tone circuit 7 for sending a hold tone to the telephone line
4, an input device 75 for the operator to input various keys such as a telephone number, a relay driver 76 which is a drive circuit of a relay, and a dialer 77 for dialing.
A telephone line voltage detection circuit 78 for detecting an off-hook of the telephone set 102, a ringer drive circuit 79 for detecting a call signal by the call signal detection circuit and ringing a voltage buzzer 80, and a dial pulse for sending out. It has a dial pulse transmission circuit 81, a call circuit 82 for making a call, a handset 83 for making a call, and a speaker 85 for monitoring the sound of the telephone line.

Further, a transformer 89 for insulating the telephone line and an operational amplifier 8 for amplifying the received signal.
7, an operational amplifier 88 for amplifying a signal to be transmitted, a capacitor 90 for cutting a direct current component of a telephone line,
A choke coil 91 for flowing the direct current component of the telephone line,
It has a relay 92 for switching the telephone line, an amplifier 86 for amplifying the sound of the telephone line, a switch for connecting and disconnecting the telephone line, and a hook switch 84 for detecting the on-hook state and the off-hook state of the handset. .

In such a configuration, when the handset of the telephone set 102 is lifted, the telephone line voltage detection circuit 78 of the telephone set 104 can detect the off-hook state of the telephone set 102, so that the display device 71 displays "line in use". ..
Further, when the telephone receiver of the telephone 102 is placed, this can be detected by the telephone line voltage detection circuit 78, so that the display of "line in use" on the display device 71 disappears.

As a result, even if the telephones 102 and 104 are connected in parallel, it is not necessary to pick up the handset of another telephone while the line is being used. Also, when a communication device such as a facsimile is connected instead of the telephone 102, an error will occur if the handset of another telephone 104 in communication picks up, but "line in use" is displayed. For example, such a thing will disappear.

Therefore, as a result, there is no erroneous telephone call, and no unnecessary telephone charges are incurred.

[0048]

According to the first aspect of the present invention, there is an effect that the response of the called station can be promptly detected by the pattern of the ringing tone at the time of transmission and the CCITT T1 timer can function as an original timer. .. In addition, it is possible to send a message after detecting a response from the called station when an automatic call is made from an answering machine or the like.

According to the second to fifth aspects of the present invention, by providing a voltage detection circuit for the telephone line, a CNG monitoring function of the facsimile machine, and a message sending function to the telephone circuit, a facsimile incoming call can be received. Even if it is received by a telephone connected in parallel with, a message is sent to the telephone side and the facsimile device side automatically receives the message just by lowering the handset. Therefore, even if the user of the telephone is unfamiliar with the facsimile, it can be received easily and surely.

When the telephone is in use,
By displaying that the line is being used, the wrong phone call due to noise during off-hook is eliminated. Therefore, since there is no mistaken telephone call, no unnecessary telephone charges are incurred.

[Brief description of drawings]

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

FIG. 2 is a circuit diagram showing an NCU in the first embodiment.

FIG. 3 is a schematic diagram showing a ringing tone pattern detection operation in the first embodiment.

FIG. 4 is a flowchart showing an operation at the time of making a call in the first embodiment.

FIG. 5 is a block diagram showing a connection state in the second embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a facsimile apparatus according to the second embodiment.

FIG. 7 is a flowchart showing an operation in the second embodiment.

FIG. 8 is a block diagram showing a connection state in a third embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a telephone according to the third embodiment.

[Explanation of symbols]

 1 ... CPU, 2 ... ROM, 3 ... RAM, 7 ... Modem part, 8 ... NCU, 9 ... Telephone line, 10 ... Telephone, 8 ... Hook relay, 23 ... Off-hook detection circuit, 24 ... CML, 25 ... Choke coil, 26 ... Capacitor, 27 ... Audio transformer, 28 ... Ring detection circuit.

Claims (5)

[Claims] 1. A detecting means for detecting a ringing tone; a clocking means for measuring a timing pattern of the ringing tone; a subsequent ringing tone, when the timing is different from the pattern predicted by the clocking means, an incoming call is received. And a control means for recognizing that the side has responded. 2. A facsimile apparatus connected in parallel with a telephone, wherein the telephone detects the voltage of the telephone line to detect whether the telephone is in use. 3. The facsimile according to claim 2, wherein the telephone receives an incoming call from the facsimile machine of the other party by detecting a CNG signal from the facsimile machine of the other party in the on-hook state. apparatus. 4. The facsimile apparatus according to claim 2, wherein when the telephone is in use, a display indicating that the line is in use is displayed. 5. The message to the telephone line according to claim 2 or 3, when the telephone receives an incoming call from the facsimile machine of the other party, the off-hook state of the telephone and the CNG signal from the facsimile machine of the other party are detected. The facsimile device is characterized in that the above-mentioned telephone is informed that it is an incoming call from the facsimile device, an instruction to put the receiver is placed, and the automatic reception of the facsimile is started.