JPH01177254A - Communication equipment - Google Patents

Abstract

PURPOSE:To eliminate the interference on an ongoing telephone talking by making the operator at a picture communication device side decide whether other telephone executes dialing or not by a display. CONSTITUTION:When a telephone 17 of an exterior device is off-hooked, a control part 1 recognizes dial data outputted to a line and displays a indicator 7 of an operation panel 6. Consequently, an operator using the hand set (a telephone set 16) of facsimile equipment can decide whether the operator of another telephone 17 executes dialing or not. Thus, a calling is executed and applying no interference to an ongoing telephone talking.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication device, and particularly to a communication device in which an image communication device with a calling device and a telephone are connected to a terminal of the same telephone line.

[Prior art] Conventionally, a facsimile device with an integrated telephone and a handset and at least one telephone (slave telephone) are connected to the same line, and the line control unit of the facsimile machine controls the line connection of each terminal. There are known configurations that do this.

FIG. 6 shows a line control procedure performed by the conventional facsimile machine as described above.

A control section including a microprocessor or the like that controls the operation of the entire device first determines in step Sl whether a telephone integrated with the device or an external telephone has gone off-hook. If step S1 is affirmative, the process proceeds to step S2; if negative, the process proceeds to step S20.

In step S20, it is determined whether a calling signal is input from the line. This determination is made using a known calling signal detection circuit included in a modem or the like. If there is a call from the line, a known receiving operation is performed in step S25.

In step 521, it is determined whether the start key on the operation panel has been pressed. If step S21 is negative, the process returns to step S1, and if affirmative, it is determined in step S22 whether or not a document is loaded in the document reading section. If a document is loaded, in step S24, the document loaded in the reading section is read and recorded in the recording section, a so-called copy process. If there is no document, a cutting process is performed in which the recording paper in the recording section is conveyed a predetermined distance and its leading edge is cut off in step S23.

On the other hand, if step S1 is affirmed, step S
2, it is determined whether the start key has been pressed. If step S2 is negative, the process returns to step Sl, and if positive, the process moves to step 326. In step S26, the presence or absence of a document in the reading section is determined in the same manner as described above.

If there is no document, reception processing is performed in step S28, and if there is a document, the document is read and transmitted in step S27.

[Problem to be solved by the invention] In the conventional processing procedure as described above, since both the built-in telephone and the external telephone are connected in parallel to the same line on the telephone side, operations of multiple telephones conflict. there is a possibility.

For example, if one operator takes a second telephone off-hook while one operator is making a call using the facsimile/ Confidentiality of communications is important because the dial signal from the telephone can interfere with conversations on the fax handset, and a second telephone can intercept conversations taking place on the fax handset. But there's a problem.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a communication device in which an image communication device with a telephone communication device and a telephone are connected to a terminal on the same telephone line. A configuration is adopted in which the image communication device is provided with means for detecting dialing information to be output and means for displaying the detected dialing information.

[Function] According to the above configuration, the operator of the image communication device can know from the display whether or not another telephone is dialing, without interfering with the ongoing call.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

FIG. 1 shows the structure of a communication system comprising a facsimile machine and a telephone employing the present invention.

In the figure, reference numeral 1 denotes a control section comprised of a microprocessor, etc., which controls each section of the apparatus shown below and performs image communication.

The communication section 2 modulates and demodulates procedure signals and image signals, and performs line control, and is composed of a modem, an NCU, and the like.

Telephone line 3 is connected to the device via communication section 2 . The communication unit 2 includes a plurality of (two in this embodiment) telephones 16 and 17.
is connected. The telephone 16 is actually integrated into the facsimile machine, with only the handset portion being provided on the machine. The telephone 17 is a slave telephone separate from the facsimile machine, and is placed at a different installation position. The connection structure between the telephone and the communication unit 2 will be described later.

Recording and reading of the original is performed by a recording section 4 and a reading section 5. The recording section 4 is composed of a thermal printer, etc., and the reading section 5 is composed of a CCD line monitor, a document conveyance system, etc.

Communication operations are controlled via the operation panel 6.

The operation panel 6 has a keyboard 8 consisting of a numeric keypad for inputting telephone numbers, various function keys, etc., a one-touch key 9 for making a call to the other party by operating a single key, and a keyboard 8 used for displaying telephone numbers, time, etc. It has a display 7 that can be displayed.

In this embodiment, as will be described later, the display 7 includes a telephone 17.
Display dialing information.

Three memories indicated by reference numerals 10 to 12 are connected to the control unit 1. ROM10 is used to store a control program to be described later. EEPROMll stores telephone numbers stored in correspondence with one-touch keys. RAM12
is used as an image memory and a work area for the control section 1. Image data to be sent and received is encoded and stored in RAM.
12.

FIG. 2 shows the connection structure of the communication section 2 and the telephone set 16 and 17 in FIG.
PPI (programmable input/output port) for controlling 2a
It consists of 2c.

As shown, the telephone line 3 in FIG. 1 has two lines Ll,
L2, and these lines L1 and L2 are connected to N CU 2
a (7) Connected to CM L relay 21.

The CML relay 21 is connected to lines L3 and L on the telephone side at the top of the diagram.
It is used to connect a line to either line L5 or L6 on the facsimile side.

Furthermore, a modem 2b is connected to the lines L5 and L6 via a modem interface circuit 22. The modem interface circuit 22 includes a coil 221 for forming a DC loop, a hybrid transformer 222 that separates the transmission signal output from the modem 2b and the reception signal input from the line, and an operational amplifier.

The modem 2b is connected to the bus of the control unit 1, and inputs and outputs modulated and demodulated signals to and from this bus.

On the other hand, two telephones 16.1 are connected in parallel to the lines L3 and L4.
7 are connected via terminals TI, T2, and Tl', T2'.

An off-hook detection circuit 23 is connected to the line leading to the external telephone 17.

Further, a pulse detection circuit 25. is connected in parallel to the lines L3 and L4.
A DTMF detection circuit 26 is connected. The pulse detection circuit 25 is used to detect a calling signal and a dial pulse signal when the line is a dial pulse system. The DTMF detection circuit 26 detects whether the line is a dial tone (D
This is used to detect a dial tone (hereinafter referred to as DTMF signal) in the case of the TMF (TMF) system. The detection signals of each circuit are input to the bus of the control unit 1 via PPl2c.

FIG. 3 shows the configuration of the pulse detection circuit 25.

As shown in FIG.
LEDs 251 and 251 are connected in parallel to each other with different polarities via varistors. These LEDs
251.251 are phototransistors 252.251 and 251.251, respectively.
Together with 252, it constitutes a photocoupler.

When a dial pulse signal is input from the telephone to the lines L3 and L4, only the alternating current component is taken out by this photocoupler, and the base of the transistor 253 is driven by this signal. Changes in the collector potential of the transistor 253 are directly output as a dial pulse signal detection signal PPl2.
c.

On the other hand, the collector potential of the transistor 253 is input to a comparator 254 and compared with a predetermined threshold value formed by a resistor 256, and an error signal is outputted to PPl2c via a driver 255.

This detection signal is a detection signal of a calling signal, and the line L3,
It becomes high level when a calling signal of a predetermined level is received at L4.

FIG. 4 shows the configuration of the DTMF detection circuit 26.

As shown, the DTMF detection circuit 26 has an audio transformer 262 connected to lines L3 and L4 via a filter circuit consisting of a resistor and a capacitor. An error amplifier consisting of an operational amplifier 263 is connected to the secondary side of the audio transformer 262. This operational amplifier 263
The output is input to a known DTMF detection IC 264.

The DTMF detection IC 264 consists of a frequency discrimination circuit,
A dial tone composed of two groups of frequencies, high and low, is detected, and dial data is output as digital data to PPl2c.

As described above, dial data based on dial pulses and dial tones, and a detection signal of a calling signal are input to PPl2c. Therefore, the control unit 1 uses PPI 2
It is possible to recognize the dial data output from the telephones 16 and 17 through the telephone line c and the presence or absence of a calling signal from the line.

Next, the operation of the above configuration will be explained.

FIG. 5 is a flowchart showing the out-of-plane procedure for the control section.

The control section engineer first determines whether the telephone 17 is off-hook in step S1. This determination is made by the off-hook detection circuit 23. If step Sl is affirmative, the process moves to step S2, and if negative, the process moves to step S29.

In step S29, the display on the display 7 of the operation panel 6 is cleared, and the process moves to step S20. Step 520-
The process at 525 is almost the same as the step with the same number in FIG.

First, in step S20, it is determined whether a calling signal is input from the line. This determination is made using the pulse detection circuit 25. If there is a call from the line, a known receiving operation is performed in step S25.

In step S21, it is determined whether the start key on the operation panel 6 has been pressed. If step S21 is negative, the process returns to step S1, and if affirmative, it is determined in step S22 whether or not a document is loaded in the reading section 5. If a document is loaded, the process proceeds to step S24. If there is no original, a so-called copy process is performed in which the original loaded in the reading section 5 is read and recorded in the recording section 4.If there is no original, step S is performed.
At step 23, the recording paper in the recording unit 4 is conveyed a predetermined distance and a cutting process is performed to cut the leading edge of the recording paper.

On the other hand, if step S1 is affirmed, step S
2, it is determined whether the start key has been pressed. If step S2 is negative, the process moves to step S3, and if it is affirmative, the process moves to step S26.

The processing in steps 326 to 528 is also the same as described above.

That is, in step S26, the presence or absence of a document in the reading section 5 is determined in the same manner as described above. If there is no original, step S28
A reception process is performed in step 327, and if there is a document, the document is read and transmitted in step 327.

If step S2 is negative, it is determined in step S3 whether the slave phone, that is, the telephone 17 is in the DTMF mode. If step S3 is affirmed, the process moves to step S4, and if negative, the process moves to step S9.

In step S4, the output of the DTMF detection circuit 26 is
2c to determine whether a dial tone signal is being output to lines L3 and L4. Step S4
If the answer is negative, the process moves to step S5, and if the answer is affirmative, the process moves to step S6.

In the loop of step S6, the DTMF detection circuit 26 detects dial tone signals inputted in sequence. The dial data is sequentially input to the control section 1.

In step S7, the presence or absence of a dial tone signal is detected again, and if there is no signal, the process loops to step S4. Also,
In step S5, it is determined whether a predetermined waiting time T seconds has elapsed. When step S5 is negative, the process returns to step S4, and when it is affirmative, the process moves to step S8.

If there is no dial tone signal after T seconds, it is assumed that the operator has finished dialing, and the process moves to step S8, where the dial data detected so far is displayed on the display 7 of the operation panel 6. Return to step S1.

On the other hand, in step S9, since the slave phone, that is, the telephone 17 is a dial pulse mode telephone, 1. In step S9, the pulse rate is detected. telephone 1
If the pulse rate of 7 is 20 pps, step SI
In the case of 10 pps, the process moves to step 511.

In steps S10 and Sll, the pulse detection circuit 25, P
Detected via Pl2c and counted the number of pulses.

Since the number of dial pulses can be treated as dial data as is, the process moves to step S12, where the dial data input so far is displayed on the display 7 of the operation panel 6, and the process returns to step S1.

According to the above configuration, when the telephone 17 external to the device goes off-hook, the control section recognizes the dial data output to the line and displays it on the display of the operation panel. The operator using telephone 16) can determine whether the operator of another telephone 17 is dialing, so that he does not interrupt an ongoing call by making a call.

In addition, according to the procedure described above, in order to automatically identify whether the external telephone is using dial pulse or dial tone and perform appropriate control, the method of the connected line can be changed instead. It also has the advantage of not requiring any switching.

In the above, the dial data of the slave telephone outside the facsimile machine is displayed, but simply displaying whether or not dialing is in progress by blinking the LED can also be effective in preventing collisions of operations. According to this method,
Even when there are two or more slave telephones, it can be easily handled.

[Effects of the Invention] As is clear from the above, according to the present invention, in a communication device formed by connecting an image communication device with a communication device and a telephone to a terminal on the same telephone line, dialing information output from the telephone can be transmitted. Since the image communication device is equipped with a means for detecting the dialing information and a means for displaying the detected dialing information, the operator of one image communication device can check whether the other telephone is dialing based on the display. This has the advantage of not interfering with ongoing calls.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a communication system consisting of a facsimile machine and a telephone that employ the present invention, Fig. 2 is a block diagram of the communication section surrounding the communication section of Fig. 1, and Fig. 3 is a circuit diagram of the pulse detection circuit of Fig. 2. , FIG. 4 is a circuit diagram of the DTMF detection circuit of FIG. 2, FIG. 5 is a flowchart showing the control procedure of the control section of FIG. 1, and FIG. 6 is a flowchart showing the control procedure of the conventional device. be. l...Control unit 2...Communication unit 3...Telephone line 4...Recording unit 5...Reading unit
6...Operation panel 7...Display unit
8...Keyboard 9...One-touch key lO・
...ROM11...EEPROM12...R
AM16.17...Telephone 23...Off footer detection circuit 25...Pulse detection circuit 26...DTMF detection circuit! 11g51 pro, black figure 1

Claims (1)

[Claims] In a communication device in which an image communication device with a communication device and a telephone are connected to a terminal of the same telephone line, means for detecting dialing information outputted by the telephone and means for displaying the detected dialing information are provided. A communication device characterized in that it is provided in an image communication device.