JPH04192650A - Modem and modem controller - Google Patents

Abstract

PURPOSE:To grasp a fault occurrence time by providing a fault detection means, a counter means, and an edit/transmission means to the controller so as to send a count data from the occurrence of a fault till the transmission. CONSTITUTION:The controller is provided with a fault detection means 8, a counter means 7 starting count when the means 8 detects a fault, and an edit/ transmission means 6 sending a count data based on the count by the means 7 together with alarm information based on a detected fault up to this point of time. Thus, the count data based on the count from the occurrence of a fault till the transmission of alarm information is sent and the fault occurrence time caused in the MODEM is surely grasped and managed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a modem and a modem controller that collects and manages failure information, etc. of the modem.

(Prior Art) For example, in a network using a modem, a plurality of modems 41 are connected by a network line 42 to form a communication system, as shown in FIG. Of course, each modem 41 is connected to a communication terminal, a central processing unit, etc. In such a communication system, each modem 41 is equipped with a function of transmitting failure information, set parameters, etc. for the purpose of maintenance and inspection, and the modem controller 43 is provided with the modem 411 via a line 425.
Connect. The modem controller 43 collects failure information and parameters from each modem 41 via the modem 411 via the line 425 and holds the collected information.

By the way, according to the conventional modem controller 43, when fault information is received, time information at the time of reception is added to the fault information and stored, so time information different from that at the time of the fault occurrence in the modem 41 is likely to be added. Ta. For example, a fault also occurs in the line 42 between the modem 41 and the modem controller 43 that were attempting to send out fault information.
If failure information can be sent after the line is restored. Furthermore, when a failure occurs in multiple modems 41, it takes time to allocate a channel for transmitting the failure information, and if the channels are allocated in a predetermined order that is different from the order in which the failure occurred, The time information provided becomes almost meaningless.

Therefore, a modem has been provided in which each of the modems 41 is provided with a timer to detect the time when a failure occurs and to send out the time when the failure occurs together with alarm information. However, such a modem requires processing to match the timer of each modem with the real time, which is a problem.

(Problems to be Solved by the Invention) As described above, the conventional modem and modem controller have a problem in that it is difficult to accurately grasp and manage the time when a failure occurs.

The present invention was made to solve the problems of conventional modems and modem controllers, and its purpose is to provide a modem and a modem controller that can accurately grasp and manage the time of occurrence of a failure that occurs in a modem. It is to provide.

[Structure of the invention]

(Means for Solving the Problems) A modem according to the present invention includes a fault detection means for detecting a fault in its own device, a counter means that starts counting when the fault detection means detects a fault, and a modem that detects a fault in its own device. editing/sending means for transmitting count value data based on the count values counted by the counter means up to this point along with alarm information based on a fault detected by the fault detecting means at the time of sending monitoring data. It is characterized by

The modem controller according to the present invention includes a fault detection means for detecting a fault in its own device, a counter means that starts counting when the fault detection means detects a fault, and a modem controller that detects the fault when transmitting monitoring data from its own device. connected via a line to a modem comprising editing/transmitting means for transmitting count value data based on the count values counted by the counter means up to this point, together with alarm information based on the fault detected by the means; The present invention is characterized in that it comprises a timer means for measuring time, and a failure occurrence time calculation means for calculating a failure occurrence time in the modem based on the count value data sent from the modem and the output of the timer means.

(Function) Since the modem according to the present invention is configured as described above, it is possible to transmit count value data based on the count value from the occurrence of a failure to the time of transmitting alarm information, and use the data to be used by the modem controller to calculate the time of failure occurrence. become.

Further, according to the modem controller of the present invention, since the time of occurrence of a failure in the modem is calculated based on the count value data given from the modem, the time of failure occurrence in the modem can be calculated taking into account the transmission time from the modem to the modem controller. In general, it is possible to perform appropriate calculations without accumulating errors due to the use of a long-time clock such as time using a timer. - (Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 shows a modem according to an embodiment of the invention. The fault detection circuit 8 detects the opening/closing of the fault detection contacts 2 (there are a plurality of contacts, but only one is shown in the figure) of the modem, and performs data editing/
Fault detection is performed by exchanging test data with other modems via the transmission circuit 6, and when a fault is detected, the data editing/transmission circuit 6 is notified of the occurrence of the fault and the type of fault. At the same time, the counter circuit 7 is reset and started. As a result, the counter circuit 7 receives a clock from a clock source (not shown) and starts counting up. The data editing/transmission circuit 6 receives the output of the counter circuit 7, and detects a fault in a time slot after a predetermined time has elapsed after receiving the transmission request signal sent from the modem controller via the line 3. The alarm information consisting of the type of etc. and the count value data based on the count value given by the counter circuit 7 are edited into one data and sent as the transmission information 5! ! 3 to the modem controller.

Figure 2 shows LA using the modem 4 shown in Figure 1 above.
A block diagram is shown in which a modem controller 1 is configured and connected to a modem controller 1. Modem controller 1 has
A transmitting/receiving section 11, a control section 12, a timer 13, a management memory table 14, and an input/output boat 15 are provided. The control section 12 sends a transmission request signal from the transmitting/receiving section 11 to each modem 41 to 45 as shown in FIG. 3 in response to an operator's input or at a predetermined time.

This transmission request signal is received by modems 41 to 45, and each modem 4 returns a response signal after a predetermined delay time. Each delay time is determined so that collisions do not occur in the signals. This response signal includes the transmission information 5 when a failure occurs as explained in FIG. The response signal is received by the transmitter/receiver 11 and sent to the controller 12. The control unit 12 analyzes the response signal, and when it detects that it is the transmission information 5, the modem 4 that sent this transmission information 5
(This data is tabled in advance for each modem 4 and held in the control unit 12.)
The failure occurrence time is calculated from the count value data of the transmission information 5, the transmission time related to the above-mentioned detection, and the current time determined by the timer 13. The time information of the occurrence of this fault is detected based on the fault type, modem identification information, and in which time slot the transmission information 5 was received. ) and stored in the management memory table 14. When the reception of the response signal is finished, the control section 12 controls the transmitter/receiver section 11 to send a response signal indicating that the transmission information 5 has been received. For example, destination information indicating that the modem associated with the failure is the destination is added to this response signal. As a result, all the modems 4 receive the reply signal, but the modem 4 associated with the failure knows that the transmission information 5 has been accepted, and, for example, the failure detection diagram B8 resets the counter circuit 7.

Note that, as the line 3 described above, a dedicated line for modem monitoring, which is different from that for data transmission and reception of the communication terminal, is generally used.

The information in the management memory table 14 is instructed to be output by an operator using a key (not shown), and is output to the input/output port 1.
5 to a printer or CRT display device (not shown) for output display.

〔Effect of the invention〕

As explained above, according to the modem of the present invention, since the count value data from the time of occurrence of a fault to the time of transmission is sent, the time of occurrence of a fault can be determined from this.

Further, according to the modem controller of the present invention, since the timer means is provided and the time of occurrence of a failure is calculated from the count value data sent from the modem, it becomes clear when the failure has occurred.

In the above, the count value data, unlike the time data, has a low degree of accumulation of errors in the clock, so that it is possible to accurately determine the time when a failure occurs.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of main parts of a modem according to an embodiment of the present invention, FIG. 2 is a block diagram of a communication system configured by a modem and a modem controller according to an embodiment of the present invention, and FIG. 3 is a block diagram of a communication system according to an embodiment of the present invention. FIG. 4 is a block diagram of a communication system composed of a modem and a modem controller. 1... Modem controller 3, 31-35... Lines 41-45... Modem 6... Data editing/transmission circuit 7... Counter circuit 8... Fault detection circuit 11... Transmission/reception unit 12... Control unit 13... Timer 14... Management memory table 15... Input/output boat agent Patent attorney Nori Chika Ken Double amount Sanno −

Claims (3)

[Claims] (1) A fault detection means for detecting a fault in the own device; a counter means that starts counting when the fault detection means detects a fault; and a counter means for starting counting when the fault detection means detects a fault; A modem comprising editing/transmitting means for transmitting count value data based on the count values counted by the counter means up to this point along with alarm information based on a failure. (2) The modem according to claim 1, wherein the counter means continues counting up until it is confirmed that the transmission of the alarm information and count value data has been accepted. (3) a fault detection means for detecting a fault in the own device; a counter means for starting counting when the fault detection means detects a fault; and a counter means for starting counting when the fault detection means detects a fault; timer means connected via a line to a modem comprising an editing/sending means for transmitting count value data based on the count values counted by the counter means up to this point along with alarm information based on the failure; and timer means for measuring time. A modem controller comprising: a failure occurrence time calculation means for calculating a failure occurrence time in the modem based on count value data sent from the modem and an output of the timer means.