JP2000049972A - Communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely receive a modem signal from a relay station even in the case that the communication device with a function corresponding to a number display service connects in parallel with one telephone line. SOLUTION: The communication device 3 copes with a caller telephone number guidance service and is provided with a means 11 that discriminates whether or not other device 5 connecting in parallel with one telephone line L makes primary reply corresponding to the caller telephone number guidance service and a means 6 that makes primary reply when the means 11 discriminates it that the other device makes no primary reply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a communication device.

[0002]

2. Description of the Related Art At present, communication devices such as telephone devices and facsimile devices have a function corresponding to a caller telephone number guidance service (number display service), which has been started nationwide on February 1, this year. (For example, see Japanese Patent Application Laid-Open No. 8-204807). This service is a service for notifying the telephone number of the calling side from the relay station at the time of an incoming call. If the above-described apparatus is made compatible with this service, it is possible to confirm the calling side before closing the called side.

[0003]

SUMMARY OF THE INVENTION
There are many cases where not only one communication device is connected to a telephone line but also a plurality of communication devices are connected in parallel.

As described above, when a plurality of communication devices are connected in parallel to one telephone line, if each of the communication devices has a function corresponding to the number display service, each of the devices is provided with the number display service. Therefore, there is a problem that it is not possible to accurately determine the processing timing between each device and the relay station, and as a result, it becomes impossible to support the number display service.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is characterized by a communication apparatus corresponding to a caller's telephone number guidance service, which is connected to one telephone line in parallel. Means for determining whether or not another connected device has made a primary response in response to the caller telephone number guidance service; and, as a result of the determination, it has been determined that the other device has not made a primary response. And a means for making a primary response.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing an example of a procedure for receiving a number display service. First, the procedure for receiving a number display service will be described based on this schematic diagram.

[0007] When receiving a connection request from the calling party, the relay station inverts the polarity of the telephone line connected to the called party, and operates at a cycle of 16 Hz for one second and an intermittent ratio of 50% (ON:
An activation signal (CAR) of OFF = 1: 1) is transmitted to the called terminal via the telephone line. When the called terminal detects the activation signal (CAR) and makes a primary response by closing the line, the relay station detects this and transmits information (telephone number etc.) indicating the calling side to 1200 bps. And sends it to the called terminal. The called terminal completes the reception of this information and releases the line. When this release is detected by the relay station, the relay station sends a 16-Hz normal calling signal (1 second on, 2 second off) to the called terminal via the telephone line.

The activation signal (CAR) is a signal transmitted only for 6 seconds after the polarity inversion of the telephone line. If there is no primary response from the called terminal during this period, the called device will be called the number. Assuming that the display service is not supported, the service is interrupted and a normal call is made. Also, after the completion of the transmission of the modem signal based on the reception of the primary response at the relay station, the called terminal receives the signal within about 2 seconds (when the dial-in function is provided) or 6 seconds (when the dial-in function is not provided). Completion processing must be performed, and if it is not possible to detect the release of the line of the called party terminal indicating that the reception of the modem signal has been completed within this time, an error is generated and a beep tone is sent out to the line, and the calling party sends a beep tone. Cancel the calling process based on the connection request.

FIG. 2 is a block diagram showing a main circuit configuration of a facsimile apparatus to which the present invention is applied.

The apparatus of this embodiment has a facsimile unit having a transformer 1, a modem 2 and a main control unit 3, a telephone unit having a built-in telephone 4 composed of a handset, and a telephone unit to which an external telephone 5 can be connected. Telephone line L is relayed by relay 6
Selectively switch connection between the X section and the telephone section. On the telephone line L side of the CML relay 6, a reversal detection circuit 7 for detecting the reversal of the polarity of the telephone line L and a detection circuit 8 for detecting a 16 Hz signal are connected. The detection results of the circuits 7 and 8 are output to the main control unit 3. In the FAX unit, a transformer 1, a modem 2,
The main control unit 3 is connected in this order. In the telephone section, C
The built-in telephone 4 is connected to a contact b of the ML relay 6 via a first opening / closing relay 9, and the external telephone 5 is connected via a second opening / closing relay 10 and a hook detection circuit 11. The hook detection circuit 11 is constituted by, for example, a photocoupler, and detects a line current generated when the external telephone 5 is connected to the telephone line L via the CML relay 6 and the second opening / closing relay 10. The detection result is output to the main control unit 3. The CML relay 6, the first and second opening / closing relays 9,
Reference numeral 10 is controlled by the main control unit 3. A capacitor 1 is connected between the contacts a and b of the CML relay 6.
3 and so on.

The main control unit 3 controls each of the above units according to a built-in control program.

FIGS. 3 and 4 are flow charts showing the control operation of the main control unit 3 at the time of an incoming call according to the above control program. Hereinafter, the incoming call operation of the apparatus of this embodiment will be described with reference to this chart.

In the apparatus of this embodiment, at the time of standby, the CML relay 6 is connected to the contact b, and the first and second switching contacts 9,
10 are both closed.

In this state, the main controller 3 determines in step S1 whether there is a call (incoming call) from the relay station. Specifically, at the beginning of an incoming call from the relay station, 16H
z signal arrives via telephone line L or telephone line L
Is inverted. The arrival of the above 16 Hz signal is 16 Hz
The detection circuit 8 detects the signal and sends the detection result to the main control unit 3. The polarity reversal of the telephone line L is detected by the inversion detection circuit 7 and the detection result is sent to the main control unit 3. The main control unit 3 determines whether there is an incoming call from the telephone line L based on the detection result.

When an incoming call is detected in step S1, the main controller 3 determines again whether a 16 Hz signal is coming from the telephone line L based on the output of the 16 Hz detection circuit 8 in step S2. In this determination, the polarity reversal determined in the step S1 is due to a line abnormality, or the output of the 16 Hz signal at the relay station occurs later than the polarity reversal.
In some cases, signal detection cannot be performed.
The presence or absence of the arrival of the Hz signal is determined. If it is determined in this determination that the 16 Hz signal has not arrived, the process returns to the step S1 to be in a standby state.

When the arrival of the 16 Hz signal is detected in step S2, the main control unit 3 resets the built-in monitoring timer to start timekeeping in step S3, and opens the first opening / closing relay 9 in step S3. 4. Prohibit line closing by off-hook of 4.

In the subsequent S4 step, the main control unit 3
The ON period of the 6 Hz signal is measured. Specifically, the time from the rise to the fall of the 16 Hz signal is measured using a built-in period measurement timer circuit.

When the measurement of the ON period of the 16 Hz signal is completed, in step S5, the main control unit 3 determines that the ON time of the 16 Hz signal measured in step S4 is a predetermined time defined as the start signal (CAR). (Approximately 0.5 seconds). The main control unit 3
In this determination, if it is determined that the time is within the predetermined time, the process proceeds to step S6; otherwise, the process proceeds to step S8.
Proceed to step.

In step S6, the main control section 3
The off period of the z signal is measured. Specifically, the time from the fall to the rise of the 16 Hz signal is measured using a built-in period measurement timer circuit.

When the measurement of the off period of the 16 Hz signal is completed, in step S7, the main control unit 3 determines that the off time of the 16 Hz signal measured in step S6 is a predetermined time defined as the start signal (CAR). (Approximately 0.5 seconds). The main control unit 3
In this determination, if it is determined that the time is within the predetermined time, the process proceeds to step S10; otherwise, the process proceeds to step S10.
Proceed to step 8.

That is, in steps S4 to S7, S2
The 16 Hz signal detected in the step is the start signal (CA
R) is determined, and if both are determined to be YES in steps S5 and S7, the 16 Hz signal detected in step S2 is the start signal (CA).
R), the process proceeds to step S10 in order to perform a process according to the reception procedure of the number display service. On the other hand, when it is determined that any one of the above steps S5 and S7 is NO, the 16 Hz signal detected in the above step S2 is not the start signal (CAR) but a normal call signal, and the processing is performed in step S8. Proceed to

In this embodiment, whether or not the 16 Hz signal detected in step S2 is the activation signal (CAR) is determined in both the ON period and the OFF period of the 16 Hz signal. It may be determined.

In step S8, the main controller 3 sets the above-mentioned S
The first opening / closing relay 9 is controlled so that the first opening / closing relay 9 opened in three steps is returned to the closed state. In the subsequent S9 step, the polarity reversal of the telephone line L detected in the above S1 step is reversed. Whether or not this is the case is determined based on the detection result of the reversal detection circuit 7. In this determination, when the caller's terminal releases the telephone line, the relay station reverses the polarity reversal of the telephone line L accordingly, so that the call from the caller's terminal is substantially ended. Is determined.

If it is determined in step S9 that the polarity is reversed, the main control unit 3 returns the process to step S1 and enters a standby state. Otherwise, the main control unit 3 detects 1 in step S2.
The 6 Hz signal is determined to be a normal calling signal, and normal reception processing is executed.

When the main control unit 3 advances the processing to the step S10, as described above, the 1
This is a case where it is determined that the 6 Hz signal is the activation signal (CAR). In this case, first, in S10, it is determined whether the external telephone 5 has detected the activation signal (CAR) and made a primary response. Do. Specifically, in this state, since the external telephone 5 can be connected to the telephone line L via the CML relay 6 and the second opening / closing relay 10, the external telephone 5 responds to the activation signal (CAR). When the line is closed (primary response), a call current flows with the telephone line L via the CML relay 6 and the second switching relay 10, and this is detected by the hook detection circuit 11, Based on this detection result, the main control unit 3 can detect the primary response of the external telephone 5. In step S10, the main control unit 10
Proceeds to the step S13 shown in FIG. 4 when the primary response of the external telephone 5 is detected.
Proceed to step 11.

In step S11, the main control unit 3 sets
In the step, it is determined whether or not the time counted by the built-in monitoring timer that started the time measurement is equal to or longer than a predetermined time. In this determination, as described above, the generation period of the activation signal (CAR) is about 6 seconds after the reversal of the polarity of the telephone line L. If the primary response is not performed within this period, the relay station determines that the called party device has the number. If the external telephone 5 does not make a primary response, it is determined to make a primary response on the FAX unit side because the service is interrupted, assuming that the external service does not support the display service. In this embodiment, the above-mentioned predetermined time is shorter than the generation period of the activation signal (CAR), and the time required from the detection of the activation signal (CAR) to the primary response in a normal device of this type is taken into consideration. It is set to about 4 seconds.

In step S11, the main control unit 3
Returns the process to step S10 if it is determined that the time measured by the built-in monitoring timer is not longer than the predetermined time, and otherwise proceeds the process to step S12.

In step S12, the main control section 3 makes a primary response to the activation signal (CAR) in place of the external telephone 5. Specifically, the main control unit 3 switches and connects the CML relay 6 to the contact a side, and connects and closes the FAX unit to the telephone line L. Thereafter, the main control section 3 advances the processing to the step S13 shown in FIG.

That is, in the above steps S10 to S12,
Predetermined time (about 6 seconds) from the start of generation of start signal (CAR)
If the external telephone 5 does not make a primary response during
The device of the present embodiment itself makes a primary response.

In step S13 shown in FIG. 4, the main control unit 3 sets up the modem 12 in a mode corresponding to the reception of a 1200 bps modem signal, and starts timing after resetting a built-in monitoring timer.

In the following S14 step, the main control unit 3
Performs modem signal reception. More specifically, when it is detected in step S10 that the external telephone 5 has made the primary response, the CML relay 6 is in a state of being connected to the contact b, so that the modem signal transmitted from the relay station is Can be received by the external telephone 5 and also received by the modem 12 via the high impedance capacitor 13. When the external telephone 5 makes a primary response by switching and connecting the CML relay 6 to the contact a in step S12 without making a primary response, the CML relay 6 is connected to the contact a. Therefore, the modem signal transmitted from the relay station cannot be received by the external telephone 5, but the modem 12
The signal is received via the L relay 6. Modem 1 above
The modem signal received at 2 is demodulated into a form that can be processed by the main control unit 3 and then transmitted to the main control unit 3.

If it is determined in step S14 that a modem signal has been received, the main control unit 3 proceeds to step S1.
The process proceeds to step 6, but if not, the step S15 is processed.

In step S15, the main control unit 3 determines whether
In three steps, it is determined whether or not the time measured by the built-in monitoring timer that started the time measurement has become equal to or longer than a second predetermined time. This determination is an error if the reception is not completed within a specific time (2 seconds or 6 seconds) from the completion of the transmission of the modem signal in the relay station, as described above, so even if the modem signal is not received. This is for forcibly shifting to the reception completion processing. Since the time from the detection of the primary response at the relay station to the completion of the transmission of the modem signal is specified to be about 3 seconds, the second predetermined time is set to 4 in this embodiment.
Seconds.

In step S15, the main control unit 3
If it is determined that the monitoring timer has not counted the second predetermined time, the process returns to step S14, and if it is determined that the time has counted, the process proceeds to step S16.

In step S16, the main control unit 3 determines whether
In three steps, the modem 12 set to the mode corresponding to the reception of the 1200 bps modem signal is set to the DTMF,
The mode is restored to the mode corresponding to the reception of other signals such as CNG, and information indicating the caller side in the modem signal received in step S14 is displayed on a display unit (not shown).

In the following S17 step, the main control unit 3
The fax unit and the telephone unit are all opened from the telephone line L and the completion of reception is clearly indicated to the relay station. Specifically, the main control unit 3
The ML relay 6 is connected to the contact b side, and the first and second switching relays 9 and 10 are opened. After maintaining this state for about 1.2 seconds, the first and second switching relays 9 and 10 are opened. Return to closed state. As a result, the relay station can detect the completion of reception, and thereafter sends a normal call signal on line L.

When the reception completion processing in step S17 is completed, the main control section 3 executes a normal reception operation based on a normal paging signal sent from the relay station.

As described above, according to this embodiment, the external telephone 5
Has a function corresponding to the number display service, the relay station gives priority to the primary response from the external telephone 5 and takes the reception timing of the modem signal based on the primary response. And the processing timing can be accurately determined.

If the external telephone 5 does not make a primary response or has no primary response function, the apparatus of this embodiment detects that there is no primary response from the external telephone 5, Since the primary response is performed instead, the primary response can be reliably performed.

Further, after receiving the modem signal, the external telephone 5
Irrespective of the line release processing, all the devices are disconnected from the line, so that the reception completion notification to the relay station can be reliably performed.

In this embodiment, the presence or absence of the primary response of the external telephone 5 is always determined. For example, the presence or absence of a function corresponding to the number display service of the external telephone 5 is determined in advance by a switch or the like. When a telephone having no function corresponding to the number display service is set to be connected as an external telephone, the primary response detection of the external telephone 5 in steps S10 and S11 is passed. Can be configured. Thereby, the time for the primary response processing can be reduced. In this case, in order to prevent the line from being closed in response to the ringing of the external telephone 5 by the activation signal (CAR), off-hook is prohibited during the number display service of the relay station as in the case of the built-in telephone 4. It is preferable that the second switching relay 10 is kept open.

[0042]

As is apparent from the above description, according to the present invention, even if a communication device having a function corresponding to the number display service is connected in parallel to one telephone line, the communication from the relay station is performed. Can be reliably received.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a number display service.

FIG. 2 is a block diagram showing a main circuit configuration of an embodiment to which the present invention is applied.

FIG. 3 is a flowchart for explaining the operation of the present embodiment.

FIG. 4 is a flowchart for explaining the operation of the present embodiment.

[Explanation of symbols]

 2 Modem 3 Main control unit 5 External telephone 6 CML relay 7 Inversion detection circuit 8 16 Hz detection circuit 10 Second open / close relay 11 Hook detection circuit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K027 BB05 HH23 JJ01 5K036 BB13 EE03 JJ05 5K101 PP03 QQ03 QQ08 QQ10 UU06 UU18

Claims (5)

[Claims] 1. A communication device corresponding to a caller telephone number guidance service, wherein another device connected in parallel to one telephone line makes a primary response in accordance with the caller telephone number guidance service. A communication device comprising: means for determining whether or not the other device has not made a primary response as a result of the determination by the means; and means for making a primary response when the other device has not made a primary response. 2. Corresponding to a caller telephone number guidance service,
A communication device connected to one telephone line in parallel with another device, a means for detecting an activation signal, and detecting the presence or absence of a primary response of the other device within a predetermined time after the detection of the means. And a means for performing a primary response when the primary response presence / absence detecting means fails to detect a primary response of the other device. 3. Corresponding to a caller telephone number guidance service,
A communication device connected to one telephone line in parallel with another device, comprising: means for releasing the telephone line as a predetermined time elapses after a primary response corresponding to a caller telephone number guidance service. A communication device characterized in that: 4. Corresponding to a caller telephone number guidance service,
A communication device connected to one telephone line in parallel with another device, a means for detecting an activation signal, and detecting the presence or absence of a primary response of the other device within a predetermined time after the detection of the means. Means, means for performing a primary response when the primary response presence / absence detection means cannot detect the primary response of the other device, and detection of the primary response of the other device by the primary response presence / absence detection means or the primary response A communication device comprising: means for releasing the telephone line as a predetermined time elapses after a response by the response means. 5. A means for detecting an activation signal of a caller directory service, a means for detecting a primary response corresponding to the caller directory service, and a means for receiving a modem signal of the caller directory service. And a means for releasing all devices connected to the telephone line from the line in response to the reception of the modem signal by the receiving unit.