JP3367958B2 - Communication device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device having an automatic calling function.

[0002]

2. Description of the Related Art Conventionally, as this type of apparatus, for example, a facsimile apparatus having an automatic dial function is known. In this facsimile apparatus, after the automatic dial call (AD call), the other party's procedure signal (for example, DI) for a period of T1 time (about 35 seconds defined by CCITT standard T30)
S) and BT (busy tone). Then, during the monitoring of the T1 time, when the procedure signal is detected, it is regarded as a facsimile communication and when the BT is detected, it is regarded as busy, and a non-delivery process is performed or a process of trying dialing a preset number of times is performed.

[0003]

However, in the above-mentioned conventional example, when the dialed call is incorrect, or when the other party is a facsimile machine (FAX), the result is recorded in a communication management report or the like. On the other hand, the other party is FAX
If not, keep capturing the line for T1 time and wait for the significant signal from the other party, or a person picks up the handset and recognizes that the call destination is FAX and leaves the handset.
Is detected and the line is released. In any case, redialing etc. is performed as a non-delivery process, the use efficiency of the line is significantly reduced, and the communication management report does not distinguish whether the other party or the FAX is not,
The operator had the drawback of not being aware that the dialing was incorrect, simply because he could not communicate.

[0004]

DISCLOSURE OF THE INVENTION According to the present invention, when a call signal is detected within the monitoring time and the disconnection of the call signal is detected, the monitoring time of the data communication procedure signal or the busy signal is extended to thereby perform the data communication. The purpose is to properly perform processing and redial processing so that the line can be used efficiently. In order to achieve the above object, the present invention detects a calling signal indicating that a communication partner is calling, a busy signal indicating that the communication partner is communicating, and a data communication procedure signal after the calling. If the ringing signal is detected within the predetermined time and the ringing signal is cut off within the predetermined time, the communication device performing within the predetermined time is extended the predetermined time, and the extended predetermined Provided is a communication device and a control method thereof, which starts data communication when the data communication procedure signal is detected within a time period and performs redial processing when the busy signal is detected.

[Embodiment] In this embodiment, for example, BT is detected after RBT is detected by monitoring a ringing tone (RBT) returned from a terminal station or the like together with BT and a procedure signal for data communication after transmitting an AD. In this case, it is judged that the destination is a telephone, not a data terminal, and the called party (calling operator) picks up the handset and puts the handset on after recognizing that the caller is the data terminal. By performing an erroneous dialing process such as reducing the number of redials, erroneous dialing is eliminated as much as possible.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the facsimile apparatus of this embodiment.

In the figure, the apparatus is controlled by a control unit 5 composed of a microprocessor element or the like according to a program stored in the ROM 3. The display unit 2 is, for example, a liquid crystal display that displays 20 digits, and displays predetermined characters and the like under the control of the control unit 5. The RAM 7 is a memory that stores device constants and the like, and the control unit 5 performs control by referring to these constants as needed. The device constant may be changed by the operator using the operation unit 1.

Reference numeral 4 is a reading unit for reading an original, and 6 is a recording unit for recording an image of an image signal and various reports. Reference numeral 8 denotes a communication unit that creates a dial signal when making a call, closes or opens a line, and includes a modem, a network control unit (NCU), and the like.

At the time of calling, the BT, RBT, etc. sent through the communication line 10 are detected by the tonal detection unit 9 via the communication unit 8 and the subsequent processing is performed according to the detection.

The tonal detection unit 9 has a structure as shown in FIG. 3, and detects a single frequency control signal defined by CCITT T30 and a DT (dial tone) BT at the time of calling. It is something to do. In addition, FIG.
3 is a diagram showing waveforms of respective signals in FIG.

First, the signal input from the communication line 10
Level adjustment is performed at 52 and 53 through the low pass filter 1 (waveform a) and binarization is performed at the binarization circuit 54 (waveform b). Then, the binarized data is input to the tonal counter (frequency counter) 55 and the integration circuit 5
It integrates in 6 (waveform d) and determines the presence or absence of energy (SDT).

The signal input to the tonal counter 55 is counted by the sampling clock for one cycle (waveform c), and the counted data is output to the control unit 5 in FIG.

The control unit 5 converts the data input from the tonal counter into a frequency based on the number of sampling clocks. At this time, more reliable data can be obtained by checking together with the presence / absence of energy (SDT).

FIG. 2 is a flow chart showing the control operation of the control unit 5 at the time of calling the automatic dial according to this embodiment.
Hereinafter, the control operation of the present embodiment will be described in detail according to the flow of FIG.

First, the auto dial is activated, and the DT
After performing detection and dialing, steps S1 and S
In 2 and S3, the procedure signal, BT, and RBT are monitored, respectively. The BT and RBT are monitored by the tonal detection unit 9 of FIG. 1, and the procedure signal is monitored by using the modem of the communication unit 8 together with the tonal detection unit 9. The signal format and frequency of BT and RBT differ depending on the public network of each country and each PBX.
It is managed on the AM and can be set by the operator via the operation unit 1. T1 hour (CCITT T30
(T1 = 35 + 5 seconds) When neither signal is detected, the communication is tried for a specified number of times after waiting for a preset time stored in the RAM (S10). Further, when the procedure signal is detected, the other party is a FAX, so the processing is promptly shifted to FAX communication (S1). If BT is detected (S2), the other party is busy (communication), and the redial process is performed at the same time when the time T1 is exceeded in step S10. When the RBT is detected, the process waits for the RBT to expire while monitoring the T1 time in steps S4 and S5. If the RBT is not detected after a certain period of time (remaining time of T1), the other party is not a fax machine but an ordinary telephone, and there is a possibility of erroneous dialing. Therefore, this is recorded in the communication management report. Then let the operator decide. If the disconnection of the RBT is detected in step S4, it is assumed that the call connection is established and T is detected in step S6.
One time is reset, and the procedure signals, BT, and RBT are continuously monitored in steps S7, S8, and S9. By resetting the T1 time here, it is not necessary to earn time by the last pause (about 10 seconds) input by the operator due to the delay of the conventional exchange operation. In addition, a timer for the communication time recorded in the communication management report etc. is started at this time, and the time until the line is opened is measured. This allows the conventional measurement method (measurement starts when the line is closed, or measurement begins when a significant signal is detected)
It is possible to measure the time more accurately than the above, and compared to the one that starts the measurement by detecting the polarity reversal, the number of exchanges that do not perform the polarity reversal is increasing, and the current applicable range is wide and effective.

If no signal is detected for T1 hours after the RBT disconnection is detected, it is presumed that the other person is raising the handset by a person, so that the erroneous dialing process is performed as in the case of T1 time over in step S5. I do. If BT is detected after the RBT disconnection is detected in step S8, it is assumed that the calling party is not a FAX but a person responds, and that the handset is placed because he noticed an abnormality on the sending side, and there is a possibility of erroneous dialing. Can be considered. Therefore, also in this case, step S9
An erroneous dialing process is performed in the same manner as when the T1 time has expired.

After the RBT disconnection is detected, FAX is performed in step S7.
If the procedure signal is detected, since the other party is a FAX, the process is immediately shifted to FAX communication. Also, CNG is sent when the auto dial is activated.
Currently, CNG is widely used to determine whether a call is made from a facsimile machine or a telephone call made by a person, and the CNG is sent in order to smoothly switch these machines. For example, the timing is R
It is also effective to make adjustments after the BT has stopped.

In the above-described embodiment, the tonal detection unit 9 is used for detecting BT and RBT, but there is a function of the modem in the communication unit 8 that performs tonal detection. The same effect can be obtained by detecting RBT. In this case, cost reduction of the tonal detection unit 9 can be expected.

Further, the present invention can be applied not only to the facsimile device but also to various data communication devices such as teletex and telex, and various modifications can be made without being limited to the above-mentioned embodiment.

As described above, according to the present embodiment, by monitoring the BT and procedure signals for data communication as well as the monitoring of the RBT returned from the terminal or the like, there is no communication during non-communication. The processing such as redialing, which was performed under the conditions, is performed by the RBT.
Depending on the case of detection / non-detection and the like, it is possible to reduce erroneous dialing as much as possible by performing erroneous dialing processing such as reducing the number of redials for a destination that is likely to be erroneously dialed.

As described above, according to the present invention, when the ringing signal is detected within the monitoring time and the disconnection of the ringing signal is detected, the monitoring time of the data communication procedure signal or the busy signal is extended. Even if the called side responds within the monitoring time after calling, the data communication procedure signal and the busy signal can be detected, so that the data communication process and the redial process can be appropriately performed, and the line can be used efficiently.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile apparatus of this embodiment.

FIG. 2 is a flowchart showing a control operation of this embodiment.

FIG. 3 is a diagram showing a detailed configuration of a tonal detection unit 9.

FIG. 4 is a diagram showing a waveform of each signal of the tonal detection unit 9.

[Explanation of symbols]

1 Operation part 2 Display 3 ROM 4 Reader 5 control unit 6 recording section 7 RAM 8 Communications department 9 Tonal detector 10 communication lines

Claims (11)

(57) [Claims] 1. A communication device for detecting a ringing signal indicating that a communication partner is calling, a busy signal indicating that the communication partner is communicating, and a data communication procedure signal within a predetermined time after calling. In the case where the call signal is detected within the predetermined time and the call signal is disconnected within the predetermined time, the predetermined time is extended and the data communication procedure is performed within the extended predetermined time. A communication device, wherein data communication is started when a signal is detected, and redial processing is performed when the busy signal is detected. 2. The number of redials when the ringing signal is detected within the predetermined time, and the busy signal is detected after the ringing of the ringing signal, and the number of redials within the predetermined time. A communication device, wherein the number of redials is different from the number of redials when the busy signal is detected without a ringing signal being detected. 3. The communication device according to claim 1, wherein the processing for extending the predetermined time is resetting the predetermined time. 4. The operator according to claim 1, wherein when the ringing signal is detected within the predetermined time and the busy signal is detected after the ringing of the ringing signal, the operator is informed that the dialing is wrong. A communication device characterized by: 5. The operator according to claim 1, wherein, when the ringing signal is detected within the predetermined time and the busy signal is detected after the disconnection of the ringing signal, the communication partner is a telephone. A communication device characterized by notifying the user. 6. The calling signal according to claim 1, wherein the ringing signal is detected within the predetermined time, and the busy signal is detected after the disconnection of the ringing signal. A communication device characterized in that the number of redials is reduced as compared with the case where the busy signal is detected without being detected. 7. The communication device according to claim 1, wherein redial processing is performed even when the ringing signal, the busy signal, and the data communication procedure signal are not detected within the predetermined time. 8. The communication device according to claim 1, further comprising management means for managing management information relating to communication, wherein the management means detects the call signal within the predetermined time period, and the call signal. When the busy signal is detected after the disconnection, the communication device records the call as an erroneous dial in a communication management report. 9. The communication device according to claim 1, further comprising: management means for managing management information regarding communication recorded in a communication management report, wherein the management means detects disconnection of the calling signal, A communication device characterized by starting measurement of communication time recorded in a communication management report. 10. The communication device according to claim 1, wherein the communication device has a sending means for sending a data communication procedure signal, and the sending means sends the data communication procedure signal after the call signal is cut off. Characterized communication device. 11. A communication device for detecting a ringing signal indicating that a communication partner is calling, a busy signal indicating that the communication partner is communicating, and a data communication procedure signal within a predetermined time after calling. In the control method, the ringing signal is detected within the predetermined time, and when the ringing signal is disconnected within the predetermined time, the predetermined time is extended, and within the extended predetermined time, the A method of controlling a communication device, comprising: starting data communication when a data communication procedure signal is detected, and performing redial processing when the busy signal is detected.