JP3242274B2 - Data communication device, switching device, and control method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, for example, dial-in
A data communication device that can be connected to the switching device that performs the service,
Switching device capable of providing dial-in service and it
These control methods are described.

[0002]

2. Description of the Related Art A conventional dial-in service method will be described.

First, the dial-in service connection operation will be briefly described. To provide this service, the local exchange performs the following connection operation. FIG. 2 shows this connection sequence. Hereinafter, the calling of the terminal, the transmission of the extension designation signal, the reception of the extension designation reception completion signal, the extension response, and the communication termination will be described in order with reference to FIG.

(A) Calling a terminal.

When a subscriber's line switch receives a call at a dial-in extension, it first reverses the polarities of L1 and L2 and sends out a calling signal.

(B) Transmission of an extension designation signal.

[0007] When receiving the primary response signal (DC loop) from the terminal, the subscriber line exchange sends out an extension designation signal (PB signal).

(C) Receiving an extension designation reception completion signal.

[0009] After receiving the extension designation reception completion signal (DC loop break) from the terminal, the subscriber line exchange sends a ringing tone to the caller.

(D) Extension response.

[0011] Upon receiving a secondary response signal (DC loop) based on an extension response from the terminal, the subscriber line exchange forms a communication path.

(E) End of communication.

The sequence is performed in the same sequence as that of a general telephone or the like.

In the above dial-in service,
When the facsimile machine detects the extension designation number, it cuts off the DC loop and sends an extension designation reception completion signal to the exchange. Then, in the case of the automatic incoming call mode, the extension designation receiving completion signal is transmitted as it is, and after a predetermined time elapses,
Form a DC loop, send a secondary response signal to the switch,
Facsimile communication can be started.

However, in the case of the manual incoming call mode,
After transmitting the extension designation reception completion signal, call the operator and when the operator's response is detected, send a secondary response signal to the exchange, but if the calling side gives up the call before the operator's response, the call will not be established. Becomes

[0016]

As described above, in the conventional facsimile apparatus, when the dial-in service is set to the manual reception mode, the timing at which the caller abandons the call is not known, and the call is not established. There was a disadvantage that it becomes.

When calling a child telephone by manual incoming call,
A pseudo paging signal is required for the facsimile apparatus, which is wasteful because it has a paging signal transmitting means overlapping the exchange and the facsimile apparatus.

The present invention provides a dial-in service and the like.
Call from the exchange after the extension
Optimum incoming call processing can be performed depending on whether or not
And after the extension designation information is notified,
It is possible to omit the source of the pseudo-call signal required for incoming calls.
The purpose is to be able to.

[0019]

The present invention achieves the above object.
To and by detecting the DC loop at the time of incoming call notification confirming the primary response of the called equipment sends out the extension specifying information on the incoming call side device, the DC loop after delivery of the extension specifying information And confirming the completion of the reception of the extension designation information of the called side device, and confirming the completion of the reception of the extension designation information according to the transmitted extension designation information. A data communication device connectable to an exchange for determining whether or not to send a call signal to the operator, after receiving the extension designation information from the exchange, responding to the detection of the call signal and receiving a call to the operator. Make the first
1 or performs a second incoming call process of automatically performing an incoming call process in response to a notification of completion of reception of the extension designation information to the switching device without detecting the call signal.
The extension designation information sent from the exchange.
Registration means for registering in response to the
The extension designation information and the registration information registered by the registration means.
The first incoming call processing or the second incoming call
Control means for controlling the execution of the communication process.
And a control method therefor.
Thus , after receiving the extension designation information, it is possible to perform an optimal incoming call process depending on whether or not a call signal is transmitted from the switching device.

Further , according to the present invention, extension designation information is notified.
Call signal is sent from the switching equipment after
Since the process for incoming calls is performed, the extension designation information is notified.
Of a pseudo-call signal required when a manual call is received after a call
The source can be omitted.

Further, according to the present invention, an incoming call is
DC loop of the line connected to the local device and the detected DC
Detecting means for detecting the break of the loop, and
When notifying the incoming call, the detecting means sets the DC loop of the line.
When a loop is detected, the primary response of the called device is recognized.
First means, and recognition of the primary response by the first means
The extension designation information is transmitted to the called device in response to the
The second means and the second means have transmitted the extension designation information.
Later, the detecting means detects the break of the DC loop of the line.
The reception of the extension designation information of the called device is completed.
Means for recognizing the completion of the call and the third means for specifying the extension
Upon recognizing the completion of the reception of the information, the connection with the called device is made.
And a fourth means for transmitting a call signal to the line.
And an exchange device characterized by the following:
In a control method for controlling a switching device, a call is received by a called device.
When a call is notified, the line connected to the called
When a flow loop is detected, the primary response of the called device is transmitted.
Recognizing and responding to the primary response in response to the primary response.
Sending the extension designation information to the calling device;
Disconnection of the DC loop of the above line
Then, the completion of the reception of the extension designation information of the called device is notified.
Recognizing step and recognizing completion of reception of the extension designation information.
Then, a call signal is sent to the line connected to the called device.
Controlling the switching device, characterized by having a sending step.
By providing the control method, it is possible to omit a source of a pseudo-call signal required when the called device performs a manual incoming call after the extension designation information is notified.

[0022]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to an embodiment of the present invention.

This facsimile apparatus is connected to an exchange 0 via a line 2a. The exchange 0 has a registration circuit 1 for registering an operation before a secondary response corresponding to a telephone number.
Is provided. The registration information in the registration circuit 1 is read by the exchange 0 via the signal line 1a.

Next, the components of the facsimile machine will be sequentially described.

The NCU (network control unit) 2 connects a terminal to the line in order to use the telephone network for data communication and the like, controls connection of a telephone switching network, switches to a data communication path, holds a loop, and the like. And the connection between the telephone line 2a and the telephone 4 and the connection between the telephone line 2a and the hybrid circuit 6 are selectively switched. The NCU 2 and the telephone 4 are connected by a signal line 2b, and the NCU 2 and the hybrid circuit 6 are connected by a signal line 2c.

The switching operation of the NCU 2 is controlled by a control signal output from a control circuit 30 to be described later via a signal line 30a. When the control signal is "0", the telephone line 2a
And the telephone 4 are connected. On the other hand, when the control signal is “1”, the connection between the telephone line 2 a and the hybrid circuit 6 is performed. When the control signal is "2", the telephone line 2a is opened. further,
When the telephone 4 is off-hook, the signal at the signal level "1" is output to the signal line 2d. When the telephone 4 is on-hook, the signal at the signal level "0" is output.

The hybrid circuit 6 includes a transmission signal transmitted from the transmission system via the telephone line 2a and a telephone line 2a.
, And a reception signal to a reception system received via

The transmission system has a reading circuit 10 composed of an image pickup device such as a CCD and an optical system. The reading circuit 10 sequentially reads an image for one line in the main scanning direction from the transmission document, and outputs white and white corresponding to the read image.
Generate a binary signal for black. The binarized signal from the reading circuit 10 is given to the encoding circuit 12 via the signal line 10a.

The encoding circuit 12 encodes the binary signal input from the reading circuit 10, and outputs the encoded signal via a signal line 12a. As this encoding,
Modified Huffman coding (MH coding) or Modified read coding (MR coding) is used.

The coded signal from the coding circuit 12 is supplied to the V27ter and V29 modulators 14 and V27t
The er, V29 modulator 14 performs a modulation process on the encoded signal to generate a modulated signal. In this modulation processing, differential phase modulation based on ITU-T recommendation V27ter and quadrature modulation based on ITU-T recommendation V29 are performed.

The modulation processing speed of the V27ter / V29 modulator 14 is set based on a signal output from the control circuit 30 via the signal line 30c. That is, when the signal level output from the control circuit 30 via the signal line 30c is "0", the modulation processing speed is 9600b
/ Sec, and similarly, the signal level is “1”,
When “2” or “3”, the modulation processing speed is 720
0b / sec, 4800b / sec, 2400b / sec
c. And such V27t
er, the modulation signal from the V29 modulator 14
The signal is supplied to the addition circuit 16 via a.

The V21 modulator 8 performs a modulation process on the procedure signal output from the control circuit 30 via the signal line 30b to generate a modulation signal. This modulation process includes ITU
A modulation based on -T Recommendation V21 is used.

The adder circuit 16 receives the modulated signal output from the V21 modulator 8 via the signal line 8a and V27ter, V27ter and V27ter.
The modulation signal from the 29 modulator 14 is added, and the added signal is output to the hybrid circuit 14 via the signal line 16a as a transmission signal.

On the other hand, the receiving system is a V21 demodulator 18
And a V27ter and V29 demodulator 20. V2
The 1 demodulator 18 performs a demodulation process on the reception signal output from the hybrid circuit 6 via the signal line 6a based on the ITU-T Recommendation V21, and generates a procedure signal. This procedure signal is provided to the control circuit 30 via the signal line 18a.

The V27ter and V29 demodulators 20 demodulate the received signals from the hybrid circuit 6 to generate demodulated signals. The ITU-
Demodulation processing and I based on T recommendations V27ter and V29
A demodulation process based on TU-T Recommendation V29 is performed. V27t
er, the modulation processing speed of the V29 demodulator 20 is set based on a signal output from the control circuit 30 to be described later via a signal line 30d.

When the signal level output from the control circuit 30 via the signal line 30d is "0", the demodulation processing speed is set to 9600 b / sec, and similarly, the signal levels are "1" and "2". , “3”, the demodulation processing speed is 7200 b / sec, 4800 b / sec, 2400 b
/ Sec.

The demodulated signal output from the demodulator 20 via the signal line 20a is supplied to a decoding circuit 22. The decoding circuit 22 decodes the demodulated signal (MH (Modified Huffman) decoding or MR (Modified Read) decoding), and outputs the decoded signal to the signal line 22.
a to the recording circuit 24.

The recording circuit 24 performs recording on recording paper based on the image data from the decoding circuit 22.

The registration circuit 28 is a circuit for registering an incoming call operation corresponding to the telephone number of the dial-in service via the signal line 28a. For example, the telephone number A is registered as a manual incoming call, and the telephone number B is registered as an automatic incoming call.

The DTMF signal detection circuit 32 is a circuit for detecting the extension designation number after the primary response at the time of dial-in service. The detection circuit 32 inputs the signal output to the signal line 6a and outputs information of the detected DTMF to the signal line 32a.

The display circuit 34 is a circuit for inputting information output to the signal line 30h and displaying an incoming call operation corresponding to the telephone number of the dial-in service.

The operation unit 36 has a button for setting whether or not to transmit a call signal from the exchange when transmitting the DC loop of the secondary response signal, a button for registering an incoming call operation corresponding to the telephone number of the dial-in service, Numeric keys, one-touch dial keys, speed dial keys, start key,
In addition, a function key or the like is provided, and the pressed information is output to a signal line 36a.

The control circuit 30 executes the entire control of the present apparatus. In particular, in the first embodiment of the present invention,
When the exchange sends a call signal, it detects a DC loop and
After confirming the next response, send the extension designation number, detect the break of the DC loop and confirm the extension designation reception completion signal, and then detect the DC loop of the secondary response signal without sending the calling signal, Alternatively, a process of transmitting a calling signal and selecting whether to detect a DC loop is performed. Such selection can be set in accordance with the telephone number, that is, the extension designation number.

Further, in the first embodiment, when the automatic incoming call corresponding to the telephone number is performed by the registration circuit 1 of the exchange 0, the DC loop of the secondary response signal is not transmitted without transmitting the calling signal. When a manual incoming call is made corresponding to a telephone number, a setting is made so that a call signal is transmitted to detect a DC loop.

FIGS. 3 and 4 are flowcharts showing the control on the exchange 0 side in the first embodiment.

First, in S42, it is determined whether or not an incoming call has been selected. If no incoming call has been selected, the flow proceeds to S74. When an incoming call is selected, the process proceeds to S44, where L1,
Invert the polarity of L2. Then, in S46, a calling signal is sent to the facsimile machine.

In S48, it is determined whether or not a DC loop has been detected, that is, whether or not a primary response signal has been detected. If a DC loop has been detected, the flow proceeds to S54. If no DC loop has been detected, the flow proceeds to S50.

In S50, it is determined whether or not the other party has abandoned the call, and if abandoned, the process proceeds to S52, where the polarities of L1 and L2 are reset. If not, the process returns to S46.

At S54, the extension designation number is transmitted, and at S56, the break of the DC loop is detected, that is, the extension designation reception completion signal from the facsimile apparatus is received.

In step S58, the information of the registration circuit 1 is checked, and it is determined whether or not the extension designation signal is a destination for transmitting a call signal. If the call is to be performed, the process proceeds to S60, where a call signal is transmitted. If the destination does not transmit a call signal, specifically, if an automatic incoming call is to be performed, the process proceeds to S70.

In S62, it is determined whether a DC loop has been detected, that is, whether a secondary response signal has been detected. If a secondary response signal has been detected, in S66, after the polarities of L1 and L2 have been restored, At S68, various operations (specifically, a call operation)
I do.

If the secondary response is not detected in S62, the process proceeds to S64, in which it is determined whether or not the other party has abandoned the call. If the call is abandoned, the process proceeds to S52, in which the call is abandoned. If not, proceed to S60.

In S70, it is determined whether or not a DC loop has been detected, that is, whether or not a secondary response signal has been detected.
When the secondary response signal is detected, the process proceeds to S66, where L1, L2
And various operations (specifically, communication operations) are performed in S68.

If the secondary response is not detected, S7
The process proceeds to S2, where it is determined whether or not the other party has abandoned the call. If the call is aborted, the process proceeds to S52. If the call is not abandoned, the process proceeds to S70.

In step S74, after detecting the extension designation reception completion signal from the facsimile apparatus, it is determined whether or not registration of whether or not to transmit a calling signal is selected.
In step 6, whether or not a call signal is transmitted in correspondence with each telephone number is registered in the registration circuit 1, and if not selected, the process returns to S42 to be in a standby state.

FIGS. 5 to 7 are flowcharts showing the control of the facsimile machine in the first embodiment.

First, in S80, the signal "0" is output to the signal line 30a to turn off the CML, that is, the signal line 2a is connected to the signal line 2b.

In S82, it is determined whether registration of an incoming call operation corresponding to the telephone number of the dial-in service has been selected. If selected, the process proceeds to S84, and if not, the process proceeds to S86.

At S84, the incoming call operation corresponding to the dial-in telephone number is registered in the incoming call operation registration circuit 28. For example, automatic incoming call corresponding to telephone number A and manual incoming call corresponding to telephone number B are registered. The registered information is displayed on the display circuit 34 via the signal line 30h. Thereafter, the process proceeds to S86.

In S86, after detecting the extension designation reception completion signal to the exchange, it is determined whether or not the registration of whether or not to transmit the calling signal has been selected. It outputs whether or not a call signal is transmitted in accordance with the telephone number.

For example, since the telephone number A is set for automatic incoming call, no call signal is transmitted. Since the telephone number B is set to the manual incoming call, if it is not selected in S86 for transmitting the calling signal, the process proceeds to S90.

In S90, it is determined whether or not a calling signal has been detected. If a calling signal has been detected, the process proceeds to S94, and
If the calling signal is not detected, other processing (S
92) is performed.

In S94, a signal "1" is output to the signal line 30a to turn on the CML, form a DC loop, and transmit a primary response signal. Then, in S96, the extension designation number is received.

Next, in S98, it is determined whether or not the call is to the telephone number A.
Proceed to 00 and perform facsimile communication. If the incoming call is to the telephone number B, the process proceeds to S108, and a manual incoming call is made.

First, in S100, a signal "2" is output to the signal line 30a to open the telephone line 2a, and the DC loop is cut. That is, an extension designation reception completion signal is transmitted. Then, in S102, a wait is performed for a predetermined time, for example, 0.5 seconds.

Thereafter, in S104, a signal "1" is output to the signal line 30a to turn on the CML, that is, the signal line 2a.
Is connected to the signal line 2c to form a DC loop, and a secondary response signal is transmitted.

Then, in S106, facsimile reception is performed, and when this facsimile reception is completed,
Return to 0.

On the other hand, also in S108, the signal "2" is output to the signal line 30a to open the telephone line 2a and break the DC loop. That is, an extension designation reception completion signal is transmitted. Then, in S110, it is determined whether or not a calling signal has been detected.
To output the signal "0" to the signal line 30a to turn off the CML, that is, connect the signal line 2a to the signal line 2b.

Next, in S114, it is determined whether or not the telephone has been off-hook. If the telephone has been off-hook, a call is made in S116. Then, in S118, it is determined whether or not the telephone is on-hook.
If not, the call is continued in S116.

If the hook is not off-hook in S114,
Proceeding to S120, it is determined whether there is a call signal. If there is, a return is made to S114 to continue the off-hook detection.
Return to 82.

As the second embodiment of the present invention, as in the first embodiment, in the exchange 0, it is registered whether or not to transmit a calling signal after detecting the extension designation reception completion signal corresponding to the telephone number. Alternatively, an incoming call mode corresponding to the telephone number may be registered, and a call signal may not be sent out in the automatic incoming call mode, and a call signal may be sent out in the manual incoming call mode.

[0072]

According to the first and sixth aspects of the present invention, the extension
A switching signal is sent from the exchange after the specified information is notified.
Handling manual calls or automatic calls, depending on whether
, So it is possible to perform optimal incoming call processing
This has the effect.

When a manual call is received, the extension designation information
Can be connected to an exchange that sends out a call signal after notification
Thus, it is possible to omit the source of a pseudo call signal required for performing a manual incoming call after the extension designation information is notified.

Further, the invention according to claims 7 to 9 is characterized in that, after notifying the extension designation information, the switching apparatus transmits the extension designation information to the called apparatus.
Because it sends a call signal Te, an effect that it is possible to omit the source of the pseudo ringing signal required when called equipment performs manual call.

[Brief description of the drawings]

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

FIG. 2 is a sequence chart showing a conventional dial-in service connection operation.

FIG. 3 is a flowchart showing an operation on the exchange side according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing an operation on the exchange side in the first embodiment.

FIG. 5 is a flowchart showing an operation of the facsimile apparatus in the first embodiment.

FIG. 6 is a flowchart showing an operation of the facsimile apparatus in the first embodiment.

FIG. 7 is a flowchart showing an operation of the facsimile machine in the first embodiment.

[Explanation of symbols]

 0 ... exchanger, 1,28 ... registration circuit, 2 ... NCU, 4 ... telephone, 6 ... hybrid circuit, 8, 14 ... modulator, 10 ... reading circuit, 12 ... encoding circuit, 16 ... addition circuit, 18,20 ... demodulator, 22 ... decoding circuit, 24 ... recording circuit, 30 ... control circuit, 32 ... DTMF signal detection circuit, 34 ... display circuit, 36 ... operation unit.

Claims (9)

(57) [Claims] When a DC loop is detected at the time of notification of an incoming call and a primary response of a called device is confirmed, extension designation information is transmitted to the called device, and a DC loop is transmitted after the extension designation information is transmitted. And confirms the completion of the reception of the extension designation information of the called-side device, and in accordance with the transmitted extension designation information, confirms the completion of the reception of the extension designation information. In a data communication device connectable to an exchange for determining whether or not to send a call signal, after receiving the extension designation information from the exchange, responding to the detection of the call signal, the operator performs an incoming call operation in response to the detection of the call signal. whether to first call processing to be performed, without performing the detection of the calling signal, automatically a second incoming performing call processing in response to the reception completion notification of the extension specifying information to said switching apparatus
Specify the extension to be sent from the above switching equipment
Registration means for registering the information in accordance with the information; the extension designation information received from the switching device ;
According to the registered contents registered in the recording means, the first
To perform the incoming call process or the second incoming call process
Control means for controlling the data communication device. 2. The method according to claim 1, wherein said control means, when performing an incoming call process for causing an operator to perform an incoming call operation in response to detection of said call signal, sets a line in response to detection of said call signal. A data communication device connected to a telephone and forming a DC loop according to an incoming call operation of an operator. 3. The communication device according to claim 1, wherein the control unit automatically performs an incoming call process in response to a notification of completion of reception of the extension designation information to the switching device. A data communication device which automatically forms a DC loop in response to a reception completion notification of extension designation information. 4. The extension specifying information according to claim 1, wherein the selection by the control means is performed in accordance with extension designation information received from the switching device, wherein the switching device sends the call signal.
Alternatively, the data communication apparatus has a setting means for setting extension designation information for not sending the call signal to the switching apparatus. 5. The extension designation information according to claim 1, wherein the switching device sends the call signal.
Alternatively, the data communication device is characterized in that it is possible to register extension designation information from which the switching device does not transmit the call signal to the switching device. 6. When a DC loop is detected upon notification of an incoming call and a primary response of the called device is confirmed, extension designation information is sent to the called device, and the DC loop is transmitted after sending the extension designation information. And confirms the completion of the reception of the extension designation information by the called device, and calls the called device after confirming the completion of the reception of the extension designation information according to the transmitted extension designation information. A method for controlling a data communication device connectable to an exchange for determining whether or not to send a signal, comprising: receiving an extension designation information from the exchange; whether to first call processing to perform the operation, automatically a second incoming performing call processing in response to the reception completion notification of the extension specifying information to the calling signal detection the switching apparatus without place
The extension designation information sent from the exchange.
A registration step of registering the information corresponding to the extension information ; the extension designation information received from the switching device ;
According to the registration contents registered in the recording process, the first
Control to execute the incoming call process or the second incoming call process
Control method for data communication apparatus characterized by having a; control step of the. 7. A switching device for connecting to a called device.
Between the DC loop of the line and the detected DC loop break.
Detecting means for detecting; when notifying the called device of the incoming call, the detecting means
When a DC loop of the line is detected,
First means for recognizing a primary response; and in response to recognition of the primary response by the first means ,
Second means for transmitting extension designation information to a called device; and after the second means has transmitted the extension designation information,
When the detecting means detects the break of the DC loop of the above line,
Recognize completion of reception of the extension designation information of the called device
Third means; and the third means recognizes completion of reception of the extension designation information.
A call signal to the line connected to the called device.
Exchange apparatus characterized by having: a fourth means for output. 8. The method according to claim 7, wherein the transmission of the call signal by the fourth means is performed by the second step.
A switching device, which is performed in accordance with the extension designation information transmitted by a stage . 9. A control method for controlling a switching device, wherein when a call is notified to a called device, a connection with the called device is made.
When the DC loop of the connected line is detected,
Recognizing a primary response of the caller ; and in response to the recognition of the primary response,
Sending the fixed information; breaking the DC loop of the line after sending the extension designation information
When There is detected, a step of recognizing the completion of the reception of the extension specifying information of the incoming call side device; recognizes the completion of the reception of the extension specifying information, the incoming call side
Control method for exchanging apparatus characterized by having: a step of sending a call signal to the line connected with the device.