JPH10200651A - Data communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid collision of incoming and outgoing calls. SOLUTION: This data communication equipment in which an externally mounted telephone set 38 is connected at a post-stage and that has provision for a caller telephone number notice service is provided with a 1st changeover means 50 that selects input of received data to a modem 24 or the externally- mounted telephone set 38, with a 2nd changeover means 52 that selects the reception data received via the 1st changeover means, as to whether or not the data are to be given to the externally mounted telephone set 38, with a signal detection means 60 that detects a signal with a prescribed frequency given to output terminals of the 1st and 2nd changeover means, and with a control use CPU 12. The 2nd changeover means is used to disconnect the externally-mounted telephone set from the telephone line, to allow the data communication equipment to execute a communication sequence of the caller telephone number notice service through the changeover by the 1st changeover means and the reception of a modem signal from the reception of a start (CAR) signal until the reception of a call (IR) signal. When the IR signal is detected, the 2nd changeover means is used to connect the externally-mounted telephone set and the telephone line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication apparatus for performing data communication via a telephone line, and more particularly to a data communication apparatus in which a communication terminal is connected to a downstream terminal under a service for notifying a telephone number of a calling side. The present invention relates to a data communication device that avoids a collision between incoming and outgoing calls that occurs in such a case.

[0002]

2. Description of the Related Art Heretofore, a service for transmitting data representing a telephone number (calling telephone number) of a calling side to a telephone telephone of a receiving side from an exchange of a telephone exchange (hereinafter referred to as a "calling telephone number notification service") has been studied. It is being implemented in earnest.

The following technology has been proposed for the purpose of responding to the calling telephone number notification service.

In Japanese Patent Application Laid-Open No. 4-334245, each time an incoming call arrives at a telephone terminal, the telephone number of the caller is sequentially stored and displayed on a display. A technology for reading and transmitting a telephone number has been disclosed.

Japanese Patent Laid-Open Publication No. Hei 5-347659 discloses a ring signal and an originating telephone number input from an exchange via a telephone line, and determines whether the receiving terminal has responded to the ring signal. There is disclosed a technology for displaying a calling telephone number in a distinguished manner. According to this technique, there is an advantage that the outgoing telephone number to be recalled without responding can be immediately determined.

[0006] All of these technologies are characterized in that their functions are mainly used to display the received telephone number, store it, and use it for recalling.

Here, the flow of the connection operation between the exchange and the receiving terminal (telephone terminal, facsimile machine, etc.) in the calling telephone number notification service will be described with reference to FIG. 9 and the communication sequence of the calling telephone number notification service corresponding to the connection operation in FIG.
Will be shown.

[0008] The exchange 74 and the receiving terminal 76 are connected by a signal line through which an L1 signal (battery) and an L2 signal (information) pass, and as shown in FIG. In a state where there is no call (monitoring state), the L1 signal is held at + and the L2 signal is held at-polarity.

When a call is made from the caller to the data communication device 76, the exchange 74 sets L in the monitoring state (FIG. 8A).
1. The polarity (L1 (+), L2 (-)) of the L2 signal is inverted to L1 (-), L2 (+), and the ID receiving terminal activation signal (CAR signal) after a lapse of a fixed time or more from the polarity inversion.
Is transmitted to the receiving terminal 76 (FIG. 8B). This CA
By the R signal, the receiving terminal knows that information such as the caller telephone number will be transferred from the exchange 74 thereafter.

The electrical conditions of the CAR signal are as follows. Frequency: 15 Hz or more and 20 Hz or less Transmission power: AC 75 Vrms Cadence: 0.5 seconds ON / OFF repetition Next, when a CAR signal is received, the receiving terminal 76 is CA
A primary response signal notifying that the R signal has been received is sent to the exchange 74 (FIG. 8C). The transmission of the primary response signal is performed by the receiving terminal forming a loop between L1 and L2. The loop between L1 and L2 is formed by hook-off (Hook-off) for lifting the receiver of the receiving terminal.
-off) operation.

When the receiving terminal notifies the reception of the CAR signal by hooking off, the exchange 74 transmits the outgoing telephone information including the calling party number to the so-called ITU-T Recommendation V.4. 8 is transmitted to the receiving terminal as a modem signal conforming to H.23 (FIG. 8).
(D)).

Next, upon completion of receiving the outgoing telephone information, the receiving terminal sends a reception completion signal to the exchange 74 by cutting the loop between L1 and L2 (FIG. 8 (e)). Note that the disconnection of the loop between 11 and L2 corresponds to a hook-on operation of placing the receiver of the receiving terminal on the main body.

When the exchange 74 detects the reception completion signal (hook-on) from the reception side terminal 76, the exchange 74
R signal) (FIG. 8 (g)). The IR signal is exactly the same as a normal paging signal, and its electrical conditions are as follows.

Frequency: 15 Hz or more and 20 Hz or less Transmission power: AC 75 Vrms Cadence: ON for 1 second and OFF for 2 seconds In other words, the IR signal and the CAR signal are O in the repeated signal ON / OFF pattern (cadence).
Although the time set as N and the time set as OFF are different, the signals have the same frequency and transmission power. In the following, I
The R signal and the CAR signal are collectively called a 16 Hz signal.

[0015] When the receiving terminal 76 detects the IR signal, it rings a bell if the terminal is a telephone, and when the user picks up the telephone (hook off), the connection between L1 and L2 is established. The response signal is sent to the exchange 74 (FIG. 8 (h)). When the receiving terminal 76 is a facsimile, upon detecting an IR signal, it automatically hooks off and connects L1 and L2, whereby a secondary response signal is sent to the exchange 74 (FIG. 8 (h)). . Then, communication (call) with the calling side can be started (FIG. 8).
(I)).

Even if a response different from the communication sequence shown in FIGS. 8 and 9 is made, this communication sequence is continued if the following continuation conditions are satisfied.

Continuation condition: If the receiving terminal 76 does not hook off in response to the CAR signal within a predetermined time T ₁ (6 seconds) after the polarity inversion, the exchange 74 stops sending the CAR signal and returns to the normal calling signal. Is sent. Thereafter, a normal communication / communication operation is performed.

Continuation condition: Even if the receiving terminal 76 fails to receive the modem signal, if the receiving terminal 76 hooks on within a predetermined time T ₂ (7 seconds) from the time of transmitting the modem signal, the calling telephone number notification service is not executed. The sequence continues.

As described above, as shown in FIGS. 8 and 9, in order for the telephone number to be actually notified to the receiving side when the calling telephone number notification service is implemented, the receiving side needs to communicate with the calling side. Prior to a call (communication), ITU-T Recommendation V. 23
It is necessary to communicate with the exchange using a modem signal conforming to the standard. Therefore, the receiving side performs the communication for receiving the telephone number with the exchange and the communication with the calling side twice. That is, the receiver receives the signal twice for the call. The first signal is a CAR signal received before exchanging a modem signal with the exchange, and the second signal is an IR signal for communicating (communicating) with the caller.

[0020]

However, according to the above-mentioned conventional technology, a user subscribes to a calling telephone number notification service and places another telephone terminal behind a data communication device (telephone terminal or the like) corresponding to the service. When connected, there is a problem that a collision between an outgoing call and an incoming call may occur between two terminals.

That is, in the calling telephone number notification service, the time period between the connection of the line in response to the CAR signal by the preceding data communication apparatus and the transmission of the IR signal from the exchange (NTT public document) If the call processing is started from a telephone terminal connected downstream at a time of 13 seconds or more), a call collision occurs.

If the downstream telephone terminal does not support the calling telephone number notification service, the downstream telephone terminal
In some cases, the sound may be heard in response to the R signal. In such a case, if the user hooks off due to the ringing of the telephone terminal in spite of the fact that the service is not supported, the ITU-T Recommendation V.1 from the exchange will be used. Since it cannot deal with a modem signal conforming to H.23, it is impossible to make a call (communication) with the caller.

The present invention has been made in view of the above-described circumstances, and a call is processed by a subsequent terminal during a period from when a line is connected in response to a CAR signal to when an IR signal is transmitted from an exchange. It is another object of the present invention to provide a data communication device that avoids collision between incoming and outgoing calls.

[0024]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, data communication is possible via a telephone line, a terminal is connected to a downstream terminal, and a telephone number of a calling side is provided. In the data communication device corresponding to the calling telephone number notification service for notifying the receiving side, the received data received via the telephone line is processed so as to be processed by any of the data communication device and the subsequent terminal. A first switching unit capable of switching the input path of the first switching unit; and a receiving data connected via the first switching unit and transmitted through the first switching unit. Second switching means for switching whether or not the call is made, first signal detection means for detecting a call signal from data received via the telephone line, and Information A second signal detecting means for detecting an activation signal sent from the exchange while standing, and under the calling telephone number notification service, switching the second switching means so that received data is not input to a subsequent terminal; When the activation signal is detected, the first switching means is switched to the data communication device side, and after the reception of the information of the outgoing telephone number transmitted after the activation signal is completed, the first switching means is switched to the downstream terminal side. And control means for switching the second switching means so that, when the call signal is detected next time, the received data is input to a subsequent terminal.

First, an outline of a communication sequence under the calling telephone number notification service will be described. Under this service,
When a call is made from the calling side to the receiving side, an activation signal (CAR signal) described below is transmitted prior to the information of the calling telephone number. When the receiving side responds to the CAR signal by hooking off, the exchange sends outgoing telephone number information to the receiving side. After the receiving side receives the information of the calling telephone number and responds by hooking on, the exchange sends a calling signal (IR signal) to the receiving side. Since the start signal and the call signal are in the same frequency band (15 Hz to 20 Hz), a terminal that does not support this service may erroneously recognize the start signal as a call signal, and may lose communication.

According to the first aspect of the present invention, assuming a case where a terminal is connected to the back of the data communication device corresponding to the calling telephone number notification service, the control means prevents the received data from being input to the subsequent terminal. The second switching means is switched. In this way, if the subsequent telephone terminal does not support the outgoing telephone number notification service, it prevents the activation signal from being input to the subsequent terminal and the latter terminal from ringing. Communication failure when hooked off can be prevented.

When the activation signal is detected, the first switching means is switched to the data communication device. Since this is the same operation as hooking off in response to the activation signal, the exchange executes the following sequence and sends the information of the calling telephone number to the data communication device. Here, the data communication device receives the information of the calling telephone number, and switches the first switching means to the subsequent terminal after the reception is completed. Since this corresponds to a hook-on operation indicating reception completion, the exchange next sends a call signal.

When the call signal is detected, the control means switches the second switching means so that the received data is input to the subsequent terminal. As described above, in the present invention, the second switching means is switched so that the received data is not input to the subsequent terminal from the reception of the start signal to the reception of the call signal (that is, the second terminal is connected to the telephone line). Therefore, collision between incoming and outgoing calls can be avoided even if the subsequent terminal is hooked off between the reception of the start signal and the reception of the call signal.

Further, the invention of claim 2 provides a calling telephone number notification service which can perform data communication via a telephone line, connects a terminal at a later position, and notifies the receiving side of the calling side telephone number. A first switching unit capable of switching an input path of received data so that received data received via a telephone line is processed by one of the data communication device and a subsequent terminal in a corresponding data communication device; And a second switch connected to the back of the first switch and capable of switching whether or not the received data sent via the first switch is input to the subsequent terminal. Means, first signal detecting means for detecting a call signal from data received via the telephone line, and an activation signal transmitted from the exchange prior to the information on the calling telephone number under the calling telephone number notification service. A second signal detecting means for detecting a callable calling means succeeding terminal, a hook detecting means for succeeding the terminal detects whether or not a hooking off,
Under the calling telephone number notification service, the second switching unit is switched so that the received data is not input to the subsequent terminal, and the first switching unit is switched to the data communication device when the activation signal is detected. After completion of the reception of the information of the calling telephone number transmitted after the activation signal, the first switching means is switched to a terminal at a subsequent position, and when the call signal is detected next, the first Control means for calling a terminal, and switching the second switching means so that received data is input to the subsequent terminal when a hook-off of the subsequent terminal is detected during the call. I do.

[0030] Also in the invention of claim 2, the control means includes:
From the detection of the start signal to the detection of the paging signal, the same processing as in the first aspect of the invention is performed, but when the paging signal is detected, the second processing is immediately performed as in the first aspect of the invention. Instead of switching the switching means, the calling terminal calls the subsequent terminal. This calling means can be configured as a device for outputting a signal similar to a calling signal sent from the exchange to a terminal located downstream. And
The control means switches the second switching means so that the reception data is input to the subsequent terminal when the hook detection means detects the hook-off of the subsequent terminal during the calling of the subsequent terminal.

As described above, according to the present invention, the second switching means is switched so that the received data is not input to the subsequent terminal from the reception of the activation signal until the hook of the subsequent terminal is detected. Even if the subsequent terminal is hooked off between the reception of the start signal and the reception of the call signal, the collision between the incoming and outgoing calls can be avoided.

In the second aspect of the present invention, the telephone line is not immediately connected to the subsequent terminal even if the call signal is detected, so that the embodiments as in the third and fourth aspects of the present invention are possible. Become.

That is, according to a third aspect of the present invention, in the second aspect of the present invention, there is provided output means for converting the received information of the calling telephone number into a signal for a subsequent terminal and outputting the signal to a subsequent terminal. The control means may further comprise: after the hook-off of the subsequent terminal is detected, and before the second switching means is switched so that the received data is input to the subsequent terminal, The number information is output to a subsequent terminal by the output means.

Here, as the output means, for example, a voice response device which converts the information of the calling telephone number into a voice signal and outputs the voice signal can be used. As described above, according to the present invention, when the subsequent terminal is hooked off, the telephone number of the calling party is output by the subsequent terminal, so that the call can be answered after the other party's number is known.

Further, the invention according to claim 4 is the invention according to claim 3, further comprising a measuring means for measuring a hook-off time while the subsequent terminal is hooked off from a designated time as a starting point, The control means, after the information of the calling telephone number is output to a subsequent terminal by the output means, the measuring means causes the hook-off time to be measured from the completion of the output of the information as a start point, the hook-off time The second switching means is switched so that the received data is input to the subsequent terminal only when a predetermined time has elapsed.

As described above, according to the present invention, even if the subsequent terminal is hooked off, the terminal is not immediately connected to the telephone line.
Only when the hook-off time after the output of the telephone number of the calling party exceeds a certain time, the telephone line and the subsequent terminal are connected, so that it is not necessary to answer a call that the user does not want to answer. In addition,
If the hook-on is performed before the hook-off time after outputting the information does not exceed the predetermined time, the telephone line is left open. At this time, both the data communication device and the subsequent terminal may not ring in response to the call signal.

According to the above-mentioned inventions of claims 1 to 4, it is possible to avoid call collision at least during the period from the reception of the start signal to the reception of the call signal, but despite the fact that the subsequent terminal is hooked off. It is unkind to be unable to make a call without any notification. Therefore, in the inventions of claims 5 and 6 described below, means for notifying the caller of the subsequent terminal that the call cannot be made is provided.

That is, the invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein after the start signal is detected until the call signal is detected, Notifying means for notifying by sound or displaying on a screen that calling from the terminal is impossible.

According to a sixth aspect of the present invention, in the invention of any one of the first to fourth aspects, the subsequent signal is detected after the start signal is detected until the call signal is detected. A busy tone generating means for outputting a signal for generating a busy tone to a subsequent terminal when the terminal is hooked off.

The above-described inventions of claims 1 to 6 show measures to be taken in the case where the terminal is hooked off from the subsequent terminal between the reception of the start signal and the reception of the call signal. It could be hooked off the device.

Therefore, the present invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the data from the detection of the activation signal to the detection of the call signal is detected. When a hook-off operation is performed on the communication device, a prohibition unit for prohibiting a process corresponding to the hook-off operation is further provided.

Even if the data communication device is hooked off during the period from the reception of the start signal to the reception of the call signal, the prohibition means prohibits the processing corresponding to the hook-off operation, thereby avoiding collision between incoming and outgoing calls. be able to.

[0043]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows an example of a system configuration of a data communication apparatus according to a first embodiment.
As shown in the figure, the system of the data communication device according to the first embodiment connects a data communication device (facsimile device) 10 corresponding to the above-mentioned calling telephone number notification service to a preceding stage, and provides a calling telephone number notification service. An external telephone 38 that is not compatible with the data communication device 10 is connected to the back of the data communication device 10.

The data communication device 10 as a facsimile device manages and manages the entire device based on a predetermined program.
CPU 12 for controlling and measuring time by a timer
A ROM 14 of a non-volatile memory for storing the program of the CPU 12, a RAM 16 used as a memory for temporarily storing the data of the CPU 12 and used as a buffer for the received data, and displays necessary data and serves as a data input means. And a panel display unit 18 to be used, each of which is connected to a bus 20 for transmitting data and instructions. The panel display 18
A warning display unit 19 that warns that a user cannot hook up the external telephone 38 to connect to a line while performing a process for avoiding an incoming / outgoing call collision described later;
And an operation unit 17 having a hook button for hooking off the data communication device 10.

A communication control unit 22 for controlling communication of data transmitted and received via the telephone line is connected to the bus 20. The communication control unit 22 is configured to transmit analog data received via the telephone line. Is converted to digital data and a modem 24 for converting digital data to be transmitted into analog data for telephone lines. Further, the modem 24 is connected to a telephone line via a telephone line interface device 36 for performing a switching process described later according to the present embodiment. The telephone line interface device 36 includes an external telephone 38 in addition to the telephone line and the modem 24.
And is connected to the CPU 12, and switches the connection mode in accordance with an instruction from the CPU 12.

Further, an information compression / decompression unit 26 for compressing transmission data and decompression of reception data, a recording processing unit 30 for processing a recorded image, and a reading processing unit 34 for processing a read image are provided on the bus 20. And are connected.

The recording processing section 30 is connected to a recording scanning section 28 for recording an image of the received data on a sheet. The recording processing section 30 reads out the received data stored in the RAM 16 and performs a recording scan. The interface for transferring the data to the unit 28 is controlled. Further, the reading processing unit 34 includes:
A reading scanning unit 32 that scans and reads an image of a transmission original is connected, and the reading processing unit 34 converts the read image into digital image data and converts the data into digital image data.
It controls the output interface when transferring to AM16.

Next, the telephone line interface device 36
2 is shown in FIG. As shown in FIG. 2, the telephone line interface device 36 connects the telephone line to the modem 24.
And the first for connecting to any of the external telephones 38
Switching means 50 is provided. The first switching means 50
It has an input terminal for inputting L1 and L2 signals from the telephone line, an output terminal on the ON side connected to the modem 24, and an output terminal on the OFF side to the external telephone 38. Switching is possible so as to be connected to one of the ON-side and OFF-side output terminals. That is, when the first switching means 50 is turned on, the telephone line is connected to the modem 24 and can communicate with the facsimile apparatus 10, and when the first switching means 50 is turned off, the telephone line can be connected to the external telephone 38. , The external telephone 38 can make a call.

The output terminal on the OFF side of the first switching means 50 is connected to the output terminal on the OFF side of the second switching means 52. The second switching means 52 is a means for switching whether or not the external telephone 38 is actually connected to the telephone line when the first switching means 50 is OFF, and has an input terminal connected to the external telephone 38. The ON-side output terminal is connected to a 24 V (volt) power supply circuit 72.
Then, the second switching means 52 sets the input terminal to the ON side and to the O
Switching is possible so as to be connected to one of the output terminals on the FF side. That is, when the second switching unit 52 is turned off, the external telephone 38 is connected to the telephone line when the first switching unit 50 is off, and the second switching unit 5 is turned off.
When the external telephone 38 is turned on, the external telephone 38
Connected to.

First switching means 50 and second switching means 5
2 is connected to a CPU 12 and can be switched between ON and OFF in accordance with a command from the CPU 12.
The first switching means 50 and the second switching means 52 can be realized by ordinary mechanical relays or semiconductor relays, and the use thereof is generally known. When a relay is used as the switching means, switching between ON and OFF is performed by:
It is driven by a transistor or a relay driver connected to the CPU 12.

Further, between one input terminal of the second switching means 52 and the external telephone 38 connected to the terminal, it is detected whether the external telephone 38 is hooked on or off. Hook detecting means 54 is interposed. As the hook detecting means 54, for example, a current detector using a photocoupler or a Hall element can be used.

That is, when the external telephone 38 is hooked off and a loop connection is made between L1 and L2 while the second switching means 52 is turned off, a 48V current of the telephone line flows to the hook detection means 54. However, when the external telephone 38 is hooked off and the loop between L1 and L2 is cut, no current flows to the hook detecting means 54. Also, the second
When the external telephone 38 is hooked off and a loop connection is made between L1 and L2 when the switching means 52 is turned ON, the current from the 24V power supply circuit 72 flows to the hook detecting means 54, but the external telephone 38 38 is hooked off and L
When the loop between 1 and L2 is cut, the hook detecting means 5
The current stops flowing through 4. Thus, the hook detecting means 5
By detecting whether or not a current flows through the external telephone 4, it is possible to determine whether the external telephone 38 is hooked on or off. In practice, this determination is made by the CPU 12 connected to the hook detecting means 54.

The hook detecting means 54 in FIG. 2 detects the light emitting element 56 interposed between the input terminal of the second switching means 52 and the external telephone 38, and the light emitted by the light emitting element 56. And a phototransistor 58. One electrode of the phototransistor 58 is connected to the ground, and the other electrode is connected to the CU 12. When the external telephone 38 is hooked off, the light emitting element 5
6 emits light when a current flows, and the phototransistor 58 that has detected this light conducts. Therefore, the CPU 12 determines whether or not a current has flowed through the hook detecting means 54, that is, the external telephone 3
8 can be detected as to whether or not the hook 8 has been hooked off.

A 16 Hz signal (C) is supplied to the OFF-side output terminals of the first switching means 50 and the second switching means 52.
Signal detection means 60 for detecting an AR signal and an IR signal) is connected. The signal detection means 60 is provided by the first switching means 5
A capacitor 62, a resistor 64, and a light emitting element 66 connected between one of the OFF-side output terminals of the zero and second switching means 52 and the other OFF-side output terminal. The light emitting device includes a light emitting element 68 mounted in parallel and in the opposite direction, and a phototransistor 70 disposed at a light receiving position of the light emitting element 68. One electrode of the phototransistor 70 is grounded, and the other electrode is
It is connected to PU12.

In the signal detecting means 60, only the AC component of the signal sent from the telephone line is used for the light emitting elements 66 and 68.
, And one of the light emitting element 66 and the light emitting element 68 emits light in an amount of light corresponding to the current value according to the current flowing in either direction. Then, the phototransistor 70
Is turned on when any of the light-emitting elements emits light with a light amount equal to or more than a certain amount, so that a rectangular wave corresponding to the frequency of the transmitted signal is output to the CPU 12. The CPU 12 detects the frequency of the signal by counting the number of rectangular waves within a certain period of time, and detects whether the signal sent from the telephone line is a 16 Hz signal (CAR signal, IR signal). be able to.

Further, as described above, the CAR signal and the IR signal have the signal O in one repeated pattern.
N and OFF time are different from each other.
By determining this difference, the detected 16H
It is possible to detect whether the z signal is a CAR signal or an IR signal.

Further, the telephone line interface device 36 according to the present embodiment is provided with a sound generator 73 connected to the output terminal of the second switching means 52 in parallel with the 24V power supply circuit 72. The sound generator 73 has a CPU 1
When the external telephone 38 is hooked off when the second switching means 52 is ON, the CPU 1
In response to the command from 2, an audio signal is output to notify the caller of the external telephone that connection to the line is not possible. This sound signal is input to the external telephone 38, and the external telephone 38 outputs a sound corresponding to the sound signal.

The sound generated by the sound generator 73 includes, for example, voice, melody, busy sound, and the like. Of these, the busy tone is a signal consisting of ON and OFF of 400 Hz and 0.5 seconds repeated, and the level is about -10 dbM to -20 dbM. Therefore, the busy tone generating circuit is a Wien bridge type transmission circuit. It can be easily created using a well-known oscillator circuit such as.

Next, the processing flow of the data communication device 10 according to the first embodiment will be described with reference to the flowchart of FIG. It should be noted that the flowchart described below (FIG. 3)
7 to FIG. 7) are based on the call priority mode. That is, when the power of the data communication apparatus 10 is turned on and there is an incoming / outgoing call, the first switching means 50 is switched to the off side, and the case where the telephone line can be connected to the external telephone 38 is handled.

As shown in FIG. 3, when the power of the data communication apparatus 10 is turned on (step 200), the second switching means 52 is turned on immediately (step 202). Thereby, even in the call priority mode, even if the external telephone 38 and the telephone line are disconnected and a CAR signal is sent from the exchange, the signal does not reach the external telephone 38, and erroneous detection can be prevented. In this case, the 24V power supply circuit 72 is connected to the external telephone 38.
And the hook detection means 54 is operated by the supply current of the 24V power supply circuit 72.

Next, the hook detecting means 54 is connected to the external telephone 3
It is determined whether the hook-off of No. 8 has been detected (step 204). Note that detection of hook-on and hook-off below refers to hook detection means 54 unless otherwise specified.
Detection of hook-on and hook-off in the external telephone 38 by the following.

When hook-off is detected (step 20)
4 Affirmative determination), that is, if the user voluntarily lifts the handset of the external telephone 38 and hooks off instead of calling by an IR signal, the second switching means 52 is turned off to start a call (step 242). . At this time,
Since the first switching means 50 is turned off in the call priority mode, the telephone line and the external telephone 38 are connected.
Then, a call is started (step 248), and if hook-on is detected during the call (step 250, affirmative determination), the call ends (step 252), and the process returns to step 202, where the second switching means 52 is again turned on. C as ON
The same processing is repeated so that the AR signal does not reach the external telephone 38.

On the other hand, when the hook-off is not detected (No at step 204), the CAR
It is determined whether a signal has been detected (step 20).
6). When no CAR signal is detected (step 206)
(No determination), returning to step 204, and repeating the same determination processing until hook-off detection or CAR signal detection.

When a CAR signal is detected (step 2
06 affirmative determination), since the line is not connected even if a call is made from the external telephone 38 while the second switching means 52 remains ON,
The process for notifying the caller of the call disabling (call disabling notification process) is started (step 210).

More specifically, in the call disabling notification processing in step 210, when the hook detecting means 54 detects a hook-off, the sound generator 73 outputs any one of voice, melody and busy tone for notifying call disabling. A signal is output to pick up the handset of the external telephone 38 and notify the caller who has hooked off. In addition, the data communication device 1
0 is displayed on the warning display unit 19, for example, "Calling telephone number is being processed. Outgoing / outgoing calls cannot be made. ] Is displayed. Of course, instead of letters, turn on the alarm lamp
The data may be blinked or a synthesized voice or a melody may be played from the data communication device. Further, the above methods may be combined, and the call processing notification processing is not limited to the above example.

Next, the first switching means 50 is turned on (step 212). As a result, the opened telephone line is connected to the modem 24, and the loop between L1 and L2 shifts from the open hook-on state to the closed loop-off hook-off state. That is, the data communication device 10 has transmitted a hook-off which is a primary response signal in response to the CAR signal (see FIG. 8C). As a result, the exchange executes the normal sequence under the calling telephone number notification service and sends out the information of the calling telephone number to the data communication device 10, so that the modem 24 and the communication control unit 22 start the modem communication (step). 21
4). Note that the information of the calling telephone number received by the modem communication is stored in a memory such as the RAM 16.

When the modem communication is completed (Yes at step 216), the first switching means is turned off (step 218). This causes a transition from the hook-off state in which the loop between L1 and L2 is closed to the hook-on state in which the loop is released. That is, the data communication device 10 has transmitted a hook-on signal which is a reception completion signal after the reception of the modem signal is completed (see FIG. 8E). As a result, the exchange executes a normal sequence under the calling telephone number notification service and transmits an IR signal, and thus determines whether or not an IR signal has been detected (step 219).

When an IR signal is detected (step 21)
(9 affirmative determination), the call disabling notification processing is stopped (step 220), the second switching means 52 is turned off (step 240), and the external telephone 38 is connected to the telephone line.
Thereby, the IR signal is input to the external telephone 38,
The external telephone 38 generates a ringing tone. At this time, the information of the calling telephone number received by the modem communication in step 214 may be read from the RAM 16 and displayed on the panel display unit 18 or the like.

If hook-off is detected in this state (step 244, affirmative determination), the user picks up the handset of the external telephone 38 in response to the ringing tone, so that a call is started (step 248), and a hook-on is performed during the call. Is detected (Yes at Step 250), the call ends (Step 252), and the process returns to Step 202 to turn on the second switching means 52 again so that the CAR signal does not reach the external telephone 38. The same processing is repeated.

If hook-off is not detected while the telephone line is connected to the external telephone 38 (No at Step 244), it is determined whether an IR signal is still detected (Step 246). If an IR signal is detected (Yes at step 246), the process returns to step 244 to determine again whether a hook-off is detected. As described above, while the IR signal is being detected, it is determined whether or not the external telephone 38 has been hooked off. However, if the IR signal is not detected before the hook-off is detected (No at Step 246), the call is terminated without picking up the handset of the external telephone 38, so that the process returns to Step 202 and returns to the second step again. By turning on the switching means 52, the similar processing is repeated so that the CAR signal does not reach the external telephone 38.

In the communication priority (facsimile priority) mode, the first switching means 50 is switched to the ON side, and the data communication device 10 corresponds to a sequence corresponding to the caller telephone number notification service. As described above, in the present embodiment, even if there is a call from the external telephone 38 at a later position between the reception of the CAR signal and the reception of the IR signal,
During this time, since the external telephone 38 on the rear side is disconnected from the telephone line, call collision can be prevented. In addition, since the call is prohibited from being notified during the period from the reception of the CAR signal to the reception of the IR signal, it is possible to prevent the user from being confused by the call failure. In the first embodiment, it is assumed that the downstream telephone terminal does not support the outgoing telephone number notification service, but the same applies to the case where the downstream terminal supports the service. The effect can be achieved.

Further, if the external telephone 38 at the rear does not support the calling telephone number notification service, the external telephone 3
Since the CAR signal is not input to the terminal 8, there is no possibility that the external telephone rings due to the CAR signal and the user hooks off, and communication failure due to hook-off of the subsequent terminal can be prevented.

As described above, in the present embodiment, the first and second switching means which can be realized by a simple relay or the like, and the hook detection means 54 and the signal detection means 60 which can be realized by a photocoupler or the like are constituted. Only by using the telephone line interface device 36, the subsequent telephone terminal can make a call and receive an incoming call in the same manner as a normal telephone regardless of whether or not the telephone number notification service is compatible.

(Second Embodiment) Next, a second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described.

FIG. 4 shows the configuration of a telephone line interface device 36 according to the second embodiment. As shown in the figure, the output terminal of the second switching means 52 has:
An output device 71 for outputting information of the calling telephone number and a signal generator 75 for generating a call signal are connected in parallel with the 24V power supply circuit 72.

The output device 71 is connected to the CPU 12 and, in response to a command from the CPU 12, outputs the information of the calling telephone number stored in the RAM 16 to a signal for a downstream terminal (for example, a voice signal, a downstream signal). Output code on the terminal display) and output. Here, the output device 7
1 is, for example, a voice response device, a DTMF (Dual Tone Mul
ti Frequency) signal, and the like. Here, the DTMF signal is a signal having two frequencies and is used as a push-button dial signal.

The voice response device synthesizes and converts the information of the caller telephone number as a character code into a voice signal and outputs it to the external telephone 38. When the external telephone 38 is hooked off, the caller telephone number is output. Can actually be heard as audio. As the voice response device, a commercially available voice response device can be used. In the case of the DTMF generator, since the modem 24 corresponding to the outgoing telephone number notification service has the function, it can be realized without adding hardware.

The output device 71 can be used not only as a means for notifying the calling telephone number, but also for the call disapproval notification process (step 210 in FIG. 3) according to the first embodiment.

The signal generator 75 is connected to the CPU 12, and generates a ringing tone in response to a command from the CPU 12.
Switch between N and OFF. This ringing tone is set to a signal (16 Hz, 75 Vrms, repetition of ON for 1 second, OFF for 2 seconds) similar to the IR signal sent from the exchange via the telephone line. Note that the signal generator 75 is set to 24 V
The power supply circuit 72 may be connected in series.

When the ringing tone is output from the ringing tone generator 75 when the second switching means 52 is ON, the ringing tone is input to the external telephone 38 and the external telephone 38 rings. . As the signal generator 75, a commercially available signal generator can be used.

Note that also in the second embodiment, the sound generator 73 of FIG. 2 may be connected to the output terminal of the second switching means 52 and used in the outgoing call notice processing.

Next, the flow of processing of the data communication device according to the second embodiment will be described with reference to the flowchart of FIG. The processing of FIG. 5 is similar to that of the first embodiment in that the CAR
During the period from signal reception to IR signal reception, external telephone 38
Is separated from the telephone line, except that the external telephone 38 is called by a signal from the signal generator 75. Note that, in the steps in FIG. 5, the same processes as those in FIG. 3 are denoted by the same step numbers, and the description thereof is omitted in principle, and the different process steps will be described together with the related same process steps.

As shown in FIG. 5, in the second embodiment, the IR signal is detected (step 219, affirmative determination), and the outgoing call notification process is stopped (step 220), and then the first embodiment is executed. As in the embodiment, immediately switch the second switching means 52 to O
Instead of inputting an IR signal from the exchange as an FF to an external telephone, a call signal is generated by the signal generator 75 (step 222). Thus, the calling signal output from the signal generator 75 is input to the external telephone 38 via the second switching means 52 which has been switched to the ON side, and the telephone rings.

If hook-off is detected in this state (Yes at step 224), the user picks up the handset of the external telephone 38 in response to the ringing tone, and stops the operation of the signal generator 75 to call the telephone. The sound is stopped (step 228). Next, the information of the calling telephone number stored in the RAM 16 is read (step 23).
0) The read out telephone number information is output by the output device 71 (step 232), and then the second switching means 52 is turned off (step 242). As a result, the call is started with the user knowing the telephone number of the caller (step 248).

If hook-off is not detected while the telephone line is connected to the external telephone 38 (No at Step 224), it is determined whether an IR signal is still detected (Step 226). If an IR signal is detected (Yes at step 226), the process returns to step 224 to determine again whether a hook-off is detected. As described above, while the IR signal is being detected, it is determined whether or not the external telephone 38 has been hooked off. However, if the IR signal is not detected before the hook-off is detected (No at Step 226), the call is terminated without taking up the handset of the external telephone 38, and the operation of the signal generator 75 is stopped. Then, the ringing sound of the telephone is stopped (step 227). Then, the second switching means 5
Returning to step 204 with 2 being ON, the second switch 52 is turned ON again, and the same processing is repeated so that the CAR signal does not reach the external telephone 38.

As described above, the second embodiment is an example in which a subsequent telephone terminal is called by a calling signal of the signal generator 75, and also in this case, the same effect as in the first embodiment can be obtained. be able to. In addition, there is an advantage that the receiving side can know the telephone number of the caller even if a downstream terminal that does not support the caller telephone number notification service is used.

(Third Embodiment) Next, a third embodiment will be described. Since the configuration of the third embodiment is the same as that of the second embodiment, the same reference numerals are given and the detailed description is omitted. However, it is assumed that the CPU 12 has a function of measuring the time during which the hook detection unit 54 detects the hook-off from the designated time as a starting point.

The flow of processing of the data communication device according to the third embodiment will be described with reference to the flowchart of FIG.
Since the flowchart of FIG. 6 is the same as the flowchart of FIG. 5, the same steps as those in FIG. 5 are denoted by the same step numbers, and the description thereof is omitted in principle. A description will be given together with the same processing steps.

As shown in the flowchart of FIG. 6, after the information of the calling telephone number is outputted by the output device 71 (step 232), the counting of the hook-off time Tf is started from the time of outputting the information (step 23).
4). This counting is performed in parallel during the processing of the following steps. Then, it is determined whether or not the hook-off time Tf has exceeded the fixed time C (step 236).

When the hook-off time Tf exceeds the predetermined time C (step 236, affirmative determination), the second switching means 52 is turned off and the telephone line is connected to the external telephone 38, assuming that the receiving user is willing to talk. Connect and make calls possible.

On the other hand, when the hook-off time Tf does not exceed the predetermined time C (No in Step 236), it is determined whether or not hook-on is detected (Step 23).
8). If hook-on is not detected (step 23
(8 negative determination), returning to step 236 again and repeating the same processing. When hook-on is detected (step 23)
8 Affirmative determination), that is, if the receiver is put down before the hook-off time Tf does not exceed the predetermined time C, it is considered that the receiving user does not intend to talk, and the second switching means 52 remains ON and proceeds to step 204. Return and repeat the same process.

In the third embodiment, the data communication device 1
Since it is also possible to prevent both the 0 and the external telephone 38 from ringing in response to the ringing signal, it is possible to keep the telephone line open so that it is noisy and does not have to answer a call that the user does not want to answer.

(Fourth Embodiment) Next, a fourth embodiment will be described. Since the configuration of the fourth embodiment is the same as that of the first embodiment, the same reference numerals are given and the detailed description is omitted. Note that the fourth embodiment shows a coping method when the user directly operates the hook button 17 of the panel display unit 18 in FIG.

The flow of processing according to the fourth embodiment will be described with reference to the flowchart in FIG. As shown in the flowchart of FIG. 7, first, preprocessing is executed (step 30).
0). This preprocessing corresponds to steps 200 and 202 in FIGS.

Next, the hook detecting means 54 is connected to the external telephone 3
It is determined whether the hook-off of No. 8 has been detected (step 302). When hook-off is detected (step 302)
An affirmative determination), and a call process is executed (step 314).
This call processing corresponds to steps 242 to 252 in FIGS.

If no hook-off is detected (step 3
02 negative determination), it is determined whether or not a CAR signal is detected (step 304). If no CAR signal is detected (No at Step 304), the process returns to Step 302 and repeats the same processing.

When a CAR signal is detected (step 30)
4 affirmative determination), it is determined whether a hook-off signal transmitted to the CPU 12 when the user presses the hook button 17 of the data communication device 10 is detected (step 3).
08). When a hook-off signal is detected (step 3
08 affirmative decision), and ignores the hook-off signal (step 310). That is, even if the user presses the hook-off button 17 for the purpose of making a call from the data communication device 10 or the like,
Before the detection of the CAR signal and the detection of the call signal to the external telephone 38, the calling from the data communication device is prohibited.

Then, it is determined whether or not an IR signal has been detected (step 312). If an IR signal has not been detected yet (step 312, negative determination), step 308 is performed again.
And the same processing is repeated. When an IR signal is detected (Yes at Step 312), a call process is executed (Step 314).

As described above, in the fourth embodiment, during reception of the outgoing telephone number from when the data communication device 10 receives the CAR signal to when the data communication device 10 receives the IR signal, the user presses the hook button 17 for the purpose of making a call or the like. Is pressed and a hook-off request is issued to the data communication device 10, the request is ignored, so that a collision between an incoming call to the external telephone 38 and a call from the data communication device 10 can be avoided.

Note that the processing of FIG. 7 is applicable to the processing of FIGS. The above is each embodiment according to the present invention, but is not limited only to the above example. For example,
As the data communication device 10, other than a facsimile, a device capable of performing data communication, for example, a personal computer, a data modem device, a telephone, or the like having a communication function can be applied. Further, the external telephone 38 connected to the rear side can be constituted by a device capable of data communication as described above.

Further, the telephone line interface device 3
6 may be used by a single adapter device. In this case, a CPU for executing the processes of FIGS. 3 to 7 is built in the telephone line interface device.

Further, the telephone line interface device may be configured as a device for preventing communication failure of a single data communication device not supporting the calling telephone number notification service. In this case, the first switching unit 50 is omitted, and the telephone line is directly connected to the OFF-side output terminal of the second switching unit.

Further, the present invention can be applied to a data communication device which can be connected to a telephone line other than a general telephone line, or can be adapted to a dial-in service.

It goes without saying that the contents of the processing in the above embodiment are changed in accordance with the change of the communication sequence, for example, the change of the time such as T ₁ and T ₂ .

[0106]

As described above, according to the first aspect of the present invention, the telephone line and the downstream terminal are disconnected, and the communication from the reception of the start signal to the reception of the call signal is performed by the data communication device. Since we executed the sequence and connected the subsequent terminal to the telephone line when the ringing signal was received,
The effect is obtained that the collision of the incoming and outgoing call can be avoided even if the subsequent terminal is hooked off between the reception of the start signal and the reception of the call signal.

According to the second aspect of the present invention, the telephone line and the downstream terminal are disconnected, and the data communication apparatus executes a communication sequence from the reception of the start signal to the reception of the call signal, thereby executing the call. When a signal is received, the subsequent terminal is called, and when a hook-off is detected, the subsequent terminal is connected to the telephone line. There is an advantage that collision between incoming and outgoing calls can be avoided even if the terminal at the other end is hooked off.

Further, according to the invention of claim 3, in the invention of claim 2, after the hook-off of the subsequent terminal is detected and before the subsequent terminal is connected to the telephone line, the signal is received. Since the information of the calling telephone number is converted into a signal for the terminal at the back and output to the terminal at the back, a further effect that the telephone number of the caller can be known and answered can be obtained. Can be

Further, according to the invention of claim 4, in the invention of claim 3, even if the subsequent terminal is hooked off, it is not immediately connected to the telephone line but the telephone number of the caller is output. The telephone line and the subsequent terminal are connected only when the hook-off time after the call exceeds a certain time, so that it is not necessary to answer a call that the user does not want to answer, and both the data communication device and the subsequent terminal receive a call signal. In this case, it is possible to prevent the sound from ringing in response to the above.

According to the fifth and sixth aspects of the present invention, a call cannot be made from a subsequent terminal during a period from the detection of an activation signal to the detection of a call signal. Since the notification means is provided, a further effect that the human interface is improved can be obtained.

According to the seventh aspect of the present invention, even if the data communication device is hooked off during the period from the reception of the activation signal to the reception of the call signal, the process corresponding to the hook-off operation is prohibited. An additional effect is obtained that call collision can be avoided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a system configuration of a data communication device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a detailed configuration of a telephone line interface device provided in the data communication device according to the first embodiment.

FIG. 3 is a flowchart showing a processing flow of the data communication device according to the first embodiment.

FIG. 4 is a block diagram showing a detailed configuration of a telephone line interface device provided in the data communication device according to the second and third embodiments.

FIG. 5 is a flowchart showing a processing flow of a data communication device according to a second embodiment.

FIG. 6 is a flowchart illustrating a processing flow of a data communication device according to a third embodiment.

FIG. 7 is a flowchart illustrating a processing flow of a data communication device according to a fourth embodiment.

FIGS. 8A and 8B are diagrams showing a communication flow between the exchange and a receiving terminal supporting the service when the outgoing telephone number notification service is implemented, wherein FIG. 8A is a monitoring state, and FIG.
AR signal transmission, (c) primary response signal transmission for CAR signal, (d) outgoing telephone information transmission, (e) reception completion signal transmission for outgoing telephone information transmission, (g) IR signal transmission, (h) Is the transmission of a secondary response signal to the IR signal,
(I) is a diagram showing a state of communication (call) start.

FIG. 9 is a diagram showing a communication sequence between the exchange and a receiving terminal supporting the service when the outgoing telephone number notification service is implemented.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Data communication apparatus 12 CPU 18 Panel display part 24 Modem 36 Telephone line interface apparatus 38 External telephone 50 First switching means 52 Second switching means 54 Hook detection means 60 Signal detection means 71 Output device 72 24V power supply circuit 73 Sound Generator 75 Signal generator

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideki Fujii 3-7-1, Fuchu, Iwatsuki-shi, Saitama Fuji Xerox Co., Ltd. Iwatsuki Office

Claims (7)

[Claims] 1. A data communication apparatus which is capable of data communication via a telephone line, has a terminal connected thereto, and supports a calling telephone number notification service for notifying a receiving side of a calling side telephone number. A first switching unit capable of switching an input path of the reception data so that the reception data received via the telephone line is processed by any of the data communication device and a subsequent terminal; A second switching means connected to the downstream of the means and capable of switching whether or not the received data sent via the first switching means is input to the downstream terminal; and First signal detecting means for detecting a call signal from the data received by the telephone, and a second signal for detecting an activation signal transmitted from the exchange prior to the information on the calling telephone number under the calling telephone number notification service. Issuing means, under the calling telephone number notification service, switching the second switching means so that received data is not input to a subsequent terminal, and performing data communication with the first switching means when the activation signal is detected. Switch to the device side, switch the first switching means to the subsequent terminal after the reception of the information of the calling telephone number sent after the activation signal is completed, and then, when the call signal is detected, Control means for switching the second switching means so that is input to a subsequent terminal. 2. A data communication device which is capable of data communication via a telephone line, has a terminal connected thereto, and has a calling telephone number notification service for notifying a receiving side of a telephone number of a calling side. A first switching unit capable of switching an input path of the reception data so that the reception data received via the telephone line is processed by any of the data communication device and a subsequent terminal; A second switching means connected to the downstream of the means and capable of switching whether or not the received data sent via the first switching means is input to the downstream terminal; and First signal detecting means for detecting a call signal from the data received by the telephone, and a second signal for detecting an activation signal transmitted from the exchange prior to the information on the calling telephone number under the calling telephone number notification service. Issuing means, calling means capable of calling a subsequent terminal, hook detecting means for detecting whether or not the subsequent terminal has been hooked off, and, under the calling telephone number notification service, receiving data of the subsequent terminal The second switching means is switched so as not to be input to the first communication means, and when the activation signal is detected, the first switching means is switched to the data communication device side, and reception of information on the outgoing telephone number transmitted after the activation signal is received. After the completion, the first switching means is switched to the subsequent terminal, and when the call signal is detected, the subsequent terminal is called by the calling means, and the hook-off of the subsequent terminal is detected during the call. Control means for switching the second switching means so that the received data is input to a subsequent terminal when the data communication is performed. 3. An output unit for converting the received information of the calling telephone number into a signal for a downstream terminal and outputting the signal to a downstream terminal, wherein the control unit includes: After the hook-off is detected and before the second switching means is switched so that the received data is input to the subsequent terminal, the information of the calling telephone number is output to the subsequent terminal by the output means. 3. The data communication device according to claim 2, wherein the data communication is performed. 4. A measuring means for measuring a hook-off time while a subsequent terminal is hooked off from a designated time as a starting point, wherein the control means outputs the information of the calling telephone number to the output. Means for outputting to the subsequent terminal, the measuring means causes the hook-off time to be measured from the time when the output of the information is completed as a starting point, and only when the hook-off time exceeds a certain time, the received data is output to the subsequent terminal. To be input to the second
4. The data communication apparatus according to claim 3, wherein said switching means is switched. 5. A notifying means for notifying by sound or displaying on a screen that calling from a subsequent terminal is not possible during a period from the detection of the activation signal to the detection of the calling signal. 5. The method according to claim 1, further comprising:
The data communication device according to any one of the above. 6. A signal for generating a busy tone is output to a subsequent terminal when a subsequent terminal is hooked off between the detection of the activation signal and the detection of the call signal. 5. A busy tone generating means, further comprising:
The data communication device according to any one of the above. 7. When a hook-off operation is performed in the data communication device between the detection of the activation signal and the detection of the call signal, prohibition of processing corresponding to the hook-off operation. 7. The method according to claim 1, further comprising:
The data communication device according to any one of the above.