JP2003087403A - Remote device and reset system for the remote device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reset system for a remote device that can reset the remote device even when a fault exists in an outgoing digital line and a remote device control section is not normally operated. SOLUTION: The remote device 3 always monitors the outgoing digital line, is reset when the monitor result indicates a stop state denoting no reception of a multiplexed signal, restarts an ordinary operation after the reset and transmits a reset restart notice to a switch 1 via an incoming digital line. The switch 1 stops an output of the multiplexed signal sent to the remote device through an outgoing digital line when it is required to reset the remote device 3 and restarts the output of the multiplexed signal to the remote device 3 via the outgoing digital line when receiving the reset restart notice from the remote device 3 via the incoming digital line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote device and a remote device reset method, and more particularly to a remote device and a remote device reset method for detecting non-reception of a multiplexed signal from an exchange to reset the remote device.

[0002]

2. Description of the Related Art Referring to FIG. 4, which is a diagram showing a relationship between an exchange and a remote device, a remote device (dispersion device)
Is installed between a switch (specifically, a control device for controlling a remote device provided in the switch) and a plurality of telephones, and as a normal operation, a multiplexed signal obtained by multiplexing a plurality of voice signals is provided. Received from the exchange through the down digital line, distributed this multiplexed signal to each voice signal of multiple voice signals and sent to each corresponding telephone, received each voice signal from each telephone and multiplexed. It is in the process of sending to the exchange through the upstream digital line. Therefore, the exchange and the remote device are connected by a pair of downward (2) cables as a downstream digital line and a pair of upward (2) cables as an upstream digital line, and the number of telephones between the remote device and a plurality of telephones. It is connected by the minute cable. And
When initializing the operation of the exchange to support the maintenance of the exchange, the remote device also initializes the operation, or the remote device does not function normally for some reason and the telephone housed by the remote device is normal. When it is necessary to reset this type of remote device in order to normalize the function of the remote device in the event of an abnormal condition such as being unable to use the remote device, the conventional remote device reset method uses the downlink digital line. A bit or pattern for resetting is defined on the signal format to be transmitted to the remote device via the, and the signal for setting this reset bit or pattern is sent from the control device for controlling the remote device provided in the exchange. I'm trying to send to a remote device and the remote device will reset when it receives this signal Further, as another conventional method, assuming that the remote device control unit in the remote device that controls the remote device is operating normally, from the control device for controlling the remote device provided in the exchange, A reset instruction is transmitted as a command to the remote device via the downstream digital line, and the remote device receives this command and decodes this command by the remote device control unit in the remote device to reset it.

[0003]

In the above-mentioned conventional reset method for a remote device, since a signal in which a reset bit or pattern is set is transmitted to the remote device via a downlink digital line, the downlink digital device is used. If the line is faulty, the reset bit or pattern cannot be transmitted to the remote device, so there is a problem that the remote device cannot be reset at this time. Further, in the other conventional method described above, the reset instruction is transmitted to the remote device by a command via the downlink digital line, so that there is a failure in the downlink digital line or in the remote device that controls the remote device. When the remote device controller is not working properly (for example,
There is a problem that the remote device cannot be reset when the CPU that decodes the command in the remote device control unit runs out).

The object of the present invention is to eliminate the above-mentioned conventional drawbacks when there is a failure in the downlink digital line or when the remote device control unit in the remote device for controlling the remote device is not operating normally. Another object of the present invention is to provide a remote device capable of resetting the remote device and a remote device reset method.

[0005]

A remote device of the present invention is installed between an exchange and a plurality of telephones, and receives a multiplexed signal obtained by multiplexing a plurality of voice signals from the exchange through a downstream digital line. , The multiplexed signal is distributed to the respective voice signals of the plurality of voice signals and sent to the corresponding respective telephones, the respective voice signals are received from the respective telephones, multiplexed, and transmitted through the upstream digital line. A line monitoring reset for monitoring the downlink digital line in a remote device for normal operation sent to the exchange and outputting a reset signal when the monitoring result indicates a stop state indicating that the multiplexed signal is not received. An output unit and a remote device for controlling the remote device reset by the reset signal output by the line monitoring reset output unit It is configured to include a control unit, a.

The line monitoring reset output section of the remote device of the present invention monitors the downlink digital line,
A reception line monitoring unit that outputs a stop signal when this monitoring result indicates the stop state, and a reset output instruction signal when the stop signal is received from the reception line monitoring unit and this signal continues for a predetermined time And a reset signal output control unit that receives the reset output instruction signal from the timer unit and outputs the reset signal.

Further, the timer unit of the remote device of the present invention receives a clock pulse to count, receives a clear signal to clear the count value, and stops counting while receiving the clear signal, A counter control circuit that outputs the clear signal to the counter, receives the stop signal from the reception line monitoring unit to stop the output of the clear signal, and receives the reset signal from the reset signal output control unit to output the clear signal And a comparator that compares the count value counted by the counter with a predetermined set value corresponding to the predetermined time and outputs the reset output instruction signal when they match each other. There is.

Further, the remote device of the present invention, after resetting, restarts the control of the normal operation of the remote device and outputs a reset restart notification, and the remote device control part performs the reset restart notification. And a transmission control unit for sending the reset restart notification to the exchange through the upstream digital line.

The reset method of the remote device of the present invention is as follows.
It is installed between an exchange and a plurality of telephones, receives a multiplexed signal obtained by multiplexing a plurality of voice signals from the exchange through a downstream digital line, and receives the multiplexed signal from each of the plurality of voice signals. A remote device for performing normal operation, which is distributed to respective corresponding telephones, receives respective voice signals from the respective telephones, multiplexes them, and sends them to the exchange through an upstream digital line. The remote device which monitors a digital line and resets when the monitoring result indicates a stop state indicating that the multiplexed signal is not received, and the downlink digital line when the remote device needs to be reset. And the exchange for stopping the output of the multiplexed signal being sent to the remote device via the switch.

Further, the reset method of the remote device of the present invention, after resetting, restarts the normal operation and sends a reset restart notification to the exchange through the upstream digital line, and through the upstream digital line. And the exchange which receives the reset restart notification from the remote device and restarts the output of the multiplexed signal to the remote device via the downlink digital line.

Further, the remote device of the reset method of the remote device of the present invention monitors the downlink digital line, and when the result of the monitoring indicates the stop state indicating that the multiplexed signal is not received. A line monitor reset output unit that outputs a reset signal and a remote device control unit that controls the remote device that is reset by the reset signal output by the line monitor reset output unit are configured.

The line monitoring reset output unit of the reset system of the remote device of the present invention monitors the downlink digital line, and outputs a stop signal when the result of the monitoring indicates the stop state. A timer section that receives the stop signal from the receiving line monitoring section and outputs a reset output instruction signal when this signal continues for a predetermined time; and a reset signal that receives the reset output instruction signal from the timer section. And a reset signal output control section for outputting.

Further, the timer unit of the reset method of the remote device of the present invention receives and counts clock pulses,
A counter that receives a clear signal to clear the count value and stops counting while receiving the clear signal, and a counter that outputs the clear signal to the counter and receives the stop signal from the reception line monitoring unit A counter control circuit that stops the output and outputs the clear signal by receiving the reset signal from the reset signal output control unit, a predetermined set value corresponding to the count value counted by the counter and the predetermined time And a comparator that outputs the reset output instruction signal when they match with each other.

Also, in the reset method of the remote device according to the present invention, after the reset, the remote device control unit restarts the control of the normal operation of the remote device and outputs a reset restart notification, and the remote device control unit controls the remote device control unit. A transmission control unit that receives the reset restart notification and sends the reset restart notification to the exchange through the upstream digital line;
It is configured with.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a reset method of a remote device according to the present invention.

In this embodiment shown in FIG. 1, a switch 1 (specifically, a control device 2 for controlling a remote device 3 provided in the switch 1) and a plurality of telephones (not shown) are provided. It is installed and receives a multiplexed signal obtained by multiplexing a plurality of audio signals from the exchange 1 via a downstream digital line,
This multiplexed signal is distributed to the respective voice signals of the plurality of voice signals and sent to the corresponding telephones respectively. The respective voice signals are received from the respective telephones, multiplexed and sent to the exchange 1 via the upstream digital line. The remote device 3 (distributed device) that normally operates, and constantly monitors the downlink digital line, and the result of this monitoring is a multiplexed signal (this signal is a signal that should always be received from the exchange 1 in the normal state). Is reset to indicate a stop state indicating that it has not been received, and after reset, normal operation is resumed, and a remote device 3 that sends a reset restart notification to the exchange 1 via the upstream digital line and maintenance of the exchange 1 Therefore, when the operation of the exchange 1 is initialized (initial), the operation of the remote device 3 is also initialized, or the remote device 3 causes some cause. When it is necessary to reset the remote device 3 in order to make the remote device 3 function normally when an abnormal state occurs such that the telephone housed in the remote device 3 does not function normally and cannot be used normally. , The output of the multiplexed signal being sent to the remote device 3 via the downstream digital line is stopped, and a reset restart notification is received from the remote device 3 via the upstream digital line to the remote device 3 via the downstream digital line. And the exchange 1 which restarts the output of the multiplexed signal. (Note that the stop of the signal output to the digital line usually causes a systematic problem, but the reset control for the remote device 3 is necessary when it is determined that the remote device 3 is not functioning normally. Therefore, it is possible to stop the output of the signal to the downlink digital line by the exchange 1 and the remote device 3.
Also, there is no practical obstacle to the system between telephones. ) The remote device 3 constantly monitors the downstream digital line, and when the monitoring result indicates a stop state indicating that the multiplexed signal is not received, the reset signal 14
Of the line monitoring reset output unit 4 which outputs the following, and a remote device control unit which restarts the control of the normal operation of the remote device 3 after resetting and resetting by the reset signal 14 output by the line monitoring reset output unit 4 and outputs a reset restart notification. 5 and a transmission control section 9 which receives a reset restart notification from the remote device control section 5 and sends this reset restart notification to the exchange 1 via the upstream digital line.

The line monitoring reset output unit 4 constantly monitors the downlink digital line, and outputs a stop signal 13 when the result of the monitoring shows a stop state, and a stop signal from the reception line monitoring unit 6. 13, a timer section 7 which outputs a reset output instruction signal 16 when this signal continues for a predetermined time, and a reset signal output control section 8 which receives the reset output instruction signal 16 from the timer section 7 and outputs a reset signal 14. It is composed of and.

In FIG. 1, a CPU and a CPU peripheral control unit are shown together as an example of the configuration of the remote device control unit 5. Further, an oscillator for supplying clock pulses counted by the timer unit 7 is also shown.

Next, the operation of the reset method of the remote device according to the present embodiment will be described in detail with reference to FIGS.

FIG. 2 is a block diagram showing an example of the timer section. The timer section 7 receives a clock pulse from the oscillator to count, and receives a clear signal 15 from the counter control circuit 10 to obtain a count value. A counter 11 that clears and stops counting while receiving the clear signal 15;
The clear signal 15 is output to the counter 11, the stop signal 13 is received from the receiving line monitoring unit 6, the output of the clear signal 15 is stopped, and the reset signal 14 is received from the reset signal output control unit 8 and the clear signal 15 is output in a pulse form. The counter control circuit 10 that compares the count value counted by the counter 11 with a predetermined set value corresponding to a predetermined time (for example, 5 seconds), and outputs a reset output instruction signal 16 when they match each other. And a container 12.

FIG. 3 is a timing chart for explaining the operation of the present embodiment. The stop signal 13 from the receiving line monitor 6 and the reset output instruction signal 1 from the comparator 12 are shown.
6, reset signal 14 from the reset signal output controller 8
Further, the signal logic of the clear signal 15 from the counter control circuit 10 is all positive logic, and the signal is valid at H level.

In FIG. 1, during the period T0 to T1 shown in FIG. 3, the reception line monitoring unit 6 of the remote device 3 constantly monitors the downlink digital line and receives the received signal (multiplexed signal) through the downlink digital line. Therefore, the stop signal 13 is not output to the timer unit 7. The counter 11 of the timer unit 7 remains cleared and does not count up until the stop signal 13 is input. At time T1, when the operation of the exchange 1 is initialized for maintenance support of the exchange 1, the remote device 3 is also initialized, or the remote device 3 does not function normally for some reason. When the telephone housed in the remote device 3 falls into an abnormal state such that it cannot be used normally, the control device 2 provided in the exchange 1 resets the remote device 3 in order to make the remote device 3 function normally. Therefore, when the output of the multiplexed signal output via the downlink digital line is stopped, the reception line monitoring unit 6 detects this output stop and outputs the stop signal 13 to the counter control circuit 10 of the timer unit 7. The counter control circuit 10 that has sent this signal stops the output of the clear signal 15 to the counter 11 (releases the clear signal 15), and the clear signal 15 is released. Counter 11 starts to count up.
In the comparator 12, the counter 11 counts (counts up).
When the counted value and the preset value corresponding to the preset time (for example, 5 seconds) are compared and coincident with each other (time T
The reset output instruction signal 16 is output to 2) and the counter 1
1 stops counting. (At this time, when the stop signal 13 is released within a predetermined time (for example, 5 seconds), that is, the reception line monitoring unit 6 detects the reception signal (multiplexed signal) through the downlink digital line. When detecting and releasing the stop signal 13, the counter control circuit 10 outputs a clear signal 15 to the counter 11, and the counter 1
1 stops counting up and clears the count value. The reset signal output control unit 8 receives the reset output instruction signal 16 from the comparator 12 and has a predetermined time (for example, time T2−) sufficient to reset the remote device control unit 5.
The reset signal 14 is output for 1 second until T3). The remote device controller 5 is reset by the reset signal 14 within, for example, one second from time T2 to time T3. Further, the counter control circuit 10 receives the reset signal 14 output from the reset signal output control unit 8 at time T3.
Clear signal 1 when reset signal 14 is released at
5 is output as a pulse to clear the counter 11, and the counter 11 restarts counting. After the time T3 when the reset signal 14 is released, the remote device control unit 5 restarts the control of the normal operation of the remote device 3, sends a reset restart notification to the transmission control unit 9, and the transmission control unit 9 sets the upstream digital line. A reset restart notification for notifying that the reset is normally restarted is sent to the control device 2 provided in the exchange 1, and the control device 2 receives the reset restart notification from the remote device 3 and multiplexes to the downlink digital line. Then, the reception line monitoring unit 6 detects the multiplexed signal and releases the stop signal 13, the counter control circuit 10 outputs a clear signal 15 to the counter 11, and the counter 1 outputs the clear signal 15.
1 stops counting up and clears the count value. Then, a transition is made to a normal operation state between the exchange 1, the remote device 3 and the telephone (time T4). It should be noted that the remote device controller is controlled by the output of the reset signal 14 from the reset signal output controller 8 after the output of the multiplexed signal is stopped by the controller 2 provided in the exchange 1 (that is, the stop signal 13 is output from the receiving line monitor 6). After the resetting of the remote device control unit 5, the control device 2 provided in the exchange 1 sets the duration T1 to T2 (corresponding to the set value of the comparator 12) of the stop signal 13 until the reset of 5 is started to the down digital line. It is set to be sufficiently longer than the time T3 to T4 for restarting the transmission of the multiplexed signal to. In addition, there may be a case where the downlink digital line is disconnected due to a trouble or the like during a normal operation state. In this case, the stop signal 13 is continuously output from the reception line monitoring unit 6 after the downlink digital line is disconnected. Since the output is output, the states of times T1 to T3 are repeated, and the remote device 3 is repeatedly reset, for example, every 6 seconds, and as a result, the control device 2 provided in the exchange 1 has Since the reset restart notification is repeatedly received even though the reset control is not performed, it can be determined that some failure may occur in the downlink digital line.

In the above description, the control device 2 provided in the exchange 1 resumes the output of the multiplexed signal to the downlink digital line after waiting for the reception of the reset restart notification from the remote device 3, but it is provided in the exchange. As the operation of the control device described above, without waiting for the reception of the reset restart notification from the remote device 3,
It is also possible that the control device counts the output stop time of the multiplexed signal to the downlink digital line and restarts the output of the multiplexed signal when 5 seconds or more has elapsed from the stop. Also, the reset signal 1 is monitored by monitoring the duration of the stop signal 13.
4 is generated, but the reset signal generation condition is set to, for example, the stop signal 13 generation pattern is “2 seconds continues.
The reset signal 14 may be generated by releasing the second, continuing for 2 seconds, etc. This can be done only by reexamining the configuration of the timer unit 7. In such a case, the physical signal is transmitted to the downlink digital line. In the case of a physical failure, the stop signal 13 does not have the above-mentioned pattern because the stop signal 13 has an infinite duration, so that the reset signal 14 is not generated and the reset is not performed. The system can control the reset of the remote device by generating the above stop signal generation pattern by controlling the device.Furthermore, the stop signal continuation time, the stop signal generation pattern, the reset signal output time, etc. are fixed to the device. Instead, the configuration may be freely changed by switch setting or the like.

[0025]

As described above, according to the reset method of the remote device of the present invention, when the exchange needs to reset the remote device, it sends it to the remote device via the downlink digital line. Since the output of the multiplexed signal is stopped and the remote device monitors the downlink digital line and resets when the monitoring result indicates a stop state indicating that the multiplexed signal is not received, the downlink digital line is not disturbed. In some cases, or when the remote device control unit in the remote device that controls the remote device is not operating normally, the remote device can be reset.

After being reset, the remote device restarts control of normal operation and sends a reset restart notification to the exchange via the upstream digital line, and the exchange sends a reset restart notification from the remote device via the upstream digital line. In order to restart the output of the multiplexed signal to the remote device via the incoming / outgoing digital line, the remote device control unit in the remote device that controls the remote device resets the remote device when the downstream digital line fails and runs out of control. When the remote device automatically resets even after falling into a state, it can send a reset restart notification to the exchange even if the upstream digital line is normal. There is an effect that the state can be grasped.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a reset method of a remote device according to the present invention.

FIG. 2 is a block diagram showing an example of a timer unit.

FIG. 3 is a timing chart explaining the operation of the present embodiment.

FIG. 4 is a diagram showing a relationship between an exchange and a remote device.

[Explanation of symbols]

1 exchange 2 controller 3 remote devices 4 Line monitoring reset output section 5 Remote device controller 6 Reception line monitoring unit 7 Timer section 8 Reset signal output controller 9 Transmission control unit 10 Counter control circuit 11 counter 12 Comparator 13 Stop signal 14 Reset signal 15 Clear signal 16 Reset output instruction signal

Claims (15)

[Claims] 1. Installed between an exchange and a plurality of telephones,
A multiplexed signal obtained by multiplexing a plurality of voice signals is received from the exchange through a downlink digital line, and the multiplexed signal is distributed to the respective voice signals of the plurality of voice signals and sent to the corresponding telephones. In a remote device which receives the respective voice signals from the respective telephones, multiplexes them, and sends them to the exchange through the upstream digital line, the remote device monitors the downlink digital line, and the monitoring result is the multiplexed signal. A line monitoring reset output unit that outputs a reset signal when indicating a stop state indicating that the remote device is not received, and a remote device control that controls the remote device that resets by the reset signal output by the line monitoring reset output unit And a remote device. 2. The remote device according to claim 1, wherein the line monitoring reset output unit outputs the reset signal when the stopped state continues for a predetermined time. 3. The line monitoring reset output unit monitors the downlink digital line, and outputs a stop signal when the monitoring result indicates the stop state, and the reception line monitoring unit outputs the stop signal. A timer unit that receives a stop signal and outputs a reset output instruction signal when this signal continues for a predetermined time; and a reset signal output control unit that receives the reset output instruction signal from the timer unit and outputs the reset signal, The remote device according to claim 2, further comprising: 4. The timer unit receives a clock pulse to count, receives a clear signal to clear the count value, and stops counting while receiving the clear signal; and the clear signal to the counter. And a counter control circuit for receiving the stop signal from the receiving line monitoring unit to stop the output of the clear signal and receiving the reset signal from the reset signal output control unit and outputting the clear signal, and the counter counting 4. The comparator, which compares the counted value with a preset value corresponding to the preset time, and outputs the reset output instruction signal when they match each other. Remote device. 5. The reset signal output control unit is configured to output the reset signal for a predetermined time period sufficient to reset the remote device control unit. Remote device. 6. A remote device control unit that restarts control of the normal operation of the remote device after resetting and outputs a reset restart notification, and a reset restart notification received from the remote device control unit. 6. A transmission control unit for sending to the exchange via the upstream digital line.
The described remote device. 7. Installed between the exchange and a plurality of telephones,
A multiplexed signal obtained by multiplexing a plurality of voice signals is received from the exchange through a downlink digital line, and the multiplexed signal is distributed to the respective voice signals of the plurality of voice signals and sent to the corresponding telephones. A remote device that receives the respective voice signals from the respective telephones, multiplexes them, and sends them to the exchange through an upstream digital line, performs a normal operation, monitors the downstream digital line, and the result of the monitoring is the multiplexing. The remote device that is reset when indicating a stop state indicating that a signal is not being received, and the remote device that is transmitting to the remote device via the downlink digital line when the remote device needs to be reset. A reset system for a remote device, comprising: the exchange that stops outputting multiplexed signals. 8. The remote device which resets the normal operation after resetting and sends a reset restart notification to the exchange through the upstream digital line, and the reset restart notification from the remote device through the upstream digital line. 8. The reset method for a remote device according to claim 7, further comprising: the exchange that resumes the output of the multiplexed signal to the remote device via the downlink digital line. 9. The remote device reset method according to claim 7, wherein the remote device is reset when the stopped state continues for a predetermined time. 10. The line monitoring reset output, wherein the remote device monitors the downlink digital line and outputs a reset signal when the monitoring result indicates the stop state indicating that the multiplexed signal is not received. 10. The remote device according to claim 7, 8 or 9, further comprising: a unit, and a remote device control unit that controls the remote device reset by the reset signal output by the line monitoring reset output unit. Reset method. 11. The line monitoring reset output unit outputs the reset signal when the stopped state continues for a predetermined time.
Reset method for the described remote device. 12. The line monitoring reset output unit monitors the downlink digital line, and outputs a stop signal when the monitoring result indicates the stop state, and the reception line monitoring unit outputs the stop signal. A timer unit that receives a stop signal and outputs a reset output instruction signal when this signal continues for a predetermined time; and a reset signal output control unit that receives the reset output instruction signal from the timer unit and outputs the reset signal, The reset method for a remote device according to claim 11, further comprising: 13. The timer unit receives a clock pulse to count, clears a count value by receiving a clear signal, and stops counting while receiving the clear signal; and the clear signal to the counter. And a counter control circuit for receiving the stop signal from the receiving line monitoring unit to stop the output of the clear signal and receiving the reset signal from the reset signal output control unit and outputting the clear signal, and the counter counting 13. The comparator, which compares the counted value with a predetermined set value corresponding to the predetermined time and outputs the reset output instruction signal when they coincide with each other, 13. Remote device reset method. 14. The reset signal output control unit outputs the reset signal for a predetermined time sufficient to reset the remote device control unit. Remote device reset method. 15. The remote device control unit that restarts control of the normal operation of the remote device and outputs a reset restart notification after reset, and receives the reset restart notification from the remote device control unit, and sends the reset restart notification to the remote device control unit. 11. A transmission control unit for sending to the exchange via the upstream digital line, the transmission control unit comprising:
The reset method of the remote device according to 3 or 14.