JPH03250835A - Terminal equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a terminal device for a communication system in which a plurality of terminal devices are connected to a center device via an ISDN line network. Conventionally, in this type of communication system, as shown in FIG.
For example, if the terminal device's control unit goes out of control due to temporary noise or other factors and goes down, the terminal device will remain in the down state unless the terminal device is reset. As a result, communication becomes impossible. Conventionally, even if a terminal device went down due to a failure caused by the effects of temporary noise, etc. as mentioned above, the system was set to perform the same recovery procedure as for a fatal failure, so even if the failure occurred, it could be easily recovered. Even if the
It takes time and effort to recover a terminal device that has gone down.
As a result, there was a problem in that the operating rate of the communication system deteriorated.

(Problem to be Solved by the Invention) As mentioned above, when a terminal device connected to an ISDN network goes down, even if the cause of the downtime is an easily recoverable failure due to temporary noise etc. If the same recovery procedure as when the terminal device goes down due to a fatal failure is not performed, the terminal device will remain in a down state.
There was a drawback that the operating rate of the terminal device decreased. Therefore, the present invention eliminates the above drawback. When a recoverable fault occurs, the fault is automatically recovered and the terminal device is operated. The purpose is to provide an ISDN terminal device that can be started up.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a solution to problems that occur in each part having an intelligent circuit, such as a line interface part, a line control part, and a device control part, in a terminal device connected to a center device via an ISDN line network. a monitoring means for detecting a fault that has occurred; a reset means for resetting each part having the intelligent circuit when a fault is detected by the monitoring means; and a reset means for resetting each part having the intelligent circuit by the reset means. Thereafter, the configuration includes an initialization means for setting and initializing initial values in each of these parts.

Another configuration is a monitoring means for detecting a failure occurring in each part having an intelligent circuit, such as a line interface part, a line control part, and a device control part, in a terminal device connected to the center device via an ISDN line network. and a reset means for resetting each part having the intelligent circuit when a failure is detected by the monitoring means;
a self-diagnosis means for self-diagnosing all or part of each part having the reset intelligent circuit after each part having the intelligent circuit is reset by the reset means; and a part diagnosed by the self-diagnosis means. The apparatus includes an initialization means for initializing each part having the intelligent circuit when it is diagnosed that all of the parts are normal.

In addition to the above two configurations, the monitoring means extracts the failure factor of the detected failure from the failure occurrence part, and performs control to hold it in the holding means that is not reset, and at the time of failure recovery, first the holding means It has a configuration that includes a transmitting means for transmitting the failure factors held in the center device to the center device.

(Function) In the terminal device of the present invention, the monitoring means detects a failure occurring in each section having an intelligent circuit, such as the line interface section, line control section, and device control section. The reset means resets each part having the intelligent circuit when a fault is detected by the monitoring means. The initialization means initializes each part having the intelligent circuit after the reset means resets each part with the intelligent circuit. Detects failures that occur in parts with intelligent circuits, such as parts and equipment control parts. The reset means resets each part having the intelligent circuit when a fault is detected by the monitoring means. After each part having the intelligent circuit is reset by the reset means, the self-diagnosis means performs a self-diagnosis of all or part of each part having the reset intelligent circuit. When the self-diagnosis means diagnoses that all the parts diagnosed are normal, the initialization means
Initialize each part with the intelligent circuit.

As an effect of the above-mentioned added configuration, the monitoring means extracts the cause of the detected failure from the part where the failure has occurred, and performs control to hold it in the holding means that is not reset. At the time of failure recovery, the transmitting means first transmits the cause of the failure held in the holding means to the center device.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an ISDN terminal device of the present invention. 1 is a line interface unit that acquires and releases the line and performs call origination, reception, etc.; 2 is a line control unit that controls data transmission and reception via the line interface unit 1; and 3 is a unit that issues control commands to the line control unit 2. A device control section 4 monitors the states of the line interface section 1, line control section 2, and device control section 3, and performs reset control. The status monitoring unit 3 is a failure factor holding unit (memory) that holds failure factors when the device goes down.

Here, the status monitoring unit 4 constitutes a monitoring means and a reset means, the line interface unit 1, the line control unit 2, and the device control unit 3 include initialization means, and the line interface unit 1
, a part or all of the line control section 2 and the device control section 3 include self-diagnosis means.

The failure factor holding section 3 constitutes a holding means, and the line interface section 1, line control section 2, and device control section 3 constitute a transmitting means.

Next, the operation of this embodiment will be explained. Normally, each terminal device is connected to the center device S by ISD;
, the line interface section 1 and the line control section 2 use the D channel to send and receive television, alarm, and control signals.
and is performed by the device control section 3. At this time, the status monitoring section 4 monitors whether or not a failure has occurred in the line infrastructure section 1, line control section 2, and device control section 3. here,
When the terminal device shown in FIG. 1 is used in a security system or the like, still images, audio data, etc. are transmitted and received through the B channel, and alarm signals, control signals, etc. are transmitted and received through the D channel.

If, for example, an abnormality occurs in the data being read or written to the memory (not shown) of the device control unit 3 in such a state, or if the device control unit 3 goes out of control, the status monitoring unit 4 identifies these abnormalities as a cause of the failure. , and saves this failure factor in the failure cause holding unit 5. Thereafter, the status monitoring section 4 provides a reset signal for resetting the intelligent enclosure sections of the device control section 3, line control section 2, and line interface section 1 to each section. As a result, each section performs a reset operation. Incidentally, at this time, the failure factor holding section is not reset. When the device control section 3 performs the above reset processing, it performs self-diagnosis processing such as a memory test or an interface test, and then performs initialization to set initial values for each circuit section.If these processes are performed smoothly, the device The control unit 3 will start up. Regarding the line control section 2 and line interface section 1, those having a self-diagnosis function are reset, perform self-diagnosis, and then initialize.

Then, when the concave line interface section 1, line control section 2, and device control section 3 start up, the entire terminal device starts up.
First, the device control section 3 notifies the center device S of the fault factor held in the fault factor holding section etc. via the line control section 2 and the line interface section 1 using the D channel of the ISDN network 10. Depending on the cause of the received failure, the center device S monitors the situation for a predetermined period and then starts transmitting and receiving video, audio data, etc. with the terminal device again using the B channel of the ISDN network 10.

FIG. 2 is a flowchart showing the processing procedure of the device control section 3 when the terminal device is down. First, step 20
1 to trigger the condition monitoring unit 4. , l, and then self-diagnosis processing is performed in step 202. Next, in step 203, it is determined whether or not the self-diagnosis process has ended abnormally, but if it has ended normally, the process proceeds to step 208, where an abnormal end is displayed on a display section (not shown), and then the device is controlled. All operations of section 3 are stopped.

Next, if the self-diagnosis result is normal in step 203, the process proceeds to step 204 to initialize the hardware and software of the own device, and the process proceeds to step 205 to determine whether the initialization result is normal or abnormal. Make a judgment.

As a result, if it ends abnormally, proceed to step 208,
If the process ends normally, the process advances to step 206. Step 2
In step 06, the fault factor holding unit 5 is searched to determine whether or not the fault factor is held. If the fault factor is held, the process advances to step 207. If not, the process returns to the operation start routine and returns to the center. Start transmitting and receiving data with device S. If the process proceeds to step 207, the failure factor held in the failure cause holding unit 5 is read out, and after transmitting it to the center device via the D channel, the process returns to the operation start routine.

According to this embodiment, even if a failure occurs, recovery is possible because the failure is eliminated and the device is automatically restarted by resetting and initializing the part where the failure occurred. Even if a failure occurs in a terminal device, it can be restored in a short time and data can be sent and received, which improves the operating rate of the terminal device and improves the reliability of security systems and the like.

〔Effect of the invention〕

As described above, according to the terminal device of the present invention, when a recoverable failure occurs, the failure can be automatically recovered and the terminal device can be started up.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the terminal device of the present invention, FIG. 2 is an operation flowchart of the device control section shown in FIG. 1, and FIG. 3 is an example of a conventional ISDN communication system. It is a block diagram. 1...Line interface section 2...Line control section 3
...Device control section, 4...Status monitoring section 3.
・Failure factor holding section

Claims (3)

[Claims] (1) In a terminal device connected to a center device via an ISDN line network, a monitoring means for detecting a failure occurring in each section having an intelligent circuit such as a line interface section, a line control section, and a device control section; a reset means for resetting each part having the intelligent circuit when a failure is detected by the monitoring means; and a reset means for resetting each part having the intelligent circuit by the reset means, and then setting an initial value to each of these parts. What is claimed is: 1. A terminal device comprising: initialization means for initializing the terminal device. (2) In the terminal equipment connected to the center equipment via the ISDN line network, monitoring means for detecting failures occurring in each part having intelligent circuits such as the line interface part, the line control part, and the equipment control part; a reset means for resetting each part having the intelligent circuit when a failure is detected by the monitoring means; and after each part having the intelligent circuit is reset by the reset means, the reset intelligent circuit is reset. self-diagnosis means for self-diagnosing all or part of each part, and an initial stage for initializing each part having the intelligent circuit when all the parts diagnosed by the self-diagnosis means are diagnosed as normal; 1. A terminal device characterized by comprising: (3) The monitoring means extracts the failure cause of the detected failure from the failure occurrence part, and performs control to hold it in the holding means that is not reset, and when recovering from the failure, first extracts the cause of the failure held in the holding means. 3. The terminal device according to claim 1, further comprising a transmitting means for transmitting the cause to the center device.