JPH0332126Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Summary] Regarding the switchboard control device, which identifies whether the switchboard is installed/unmounted and the power-on status at the interface between the switchboard controller and the switchboard, the power-on status of each switchboard is determined by the control line. In order to provide a switchboard control device that is capable of detecting faults and detecting faults, the switchboard control device sends individual response request signals corresponding to each switchboard to all switchboards at regular intervals immediately after IPL. means for sequentially and repeatedly transmitting the response request signal; means for identifying a response from the switchboard to the response request signal; and means for recognizing that the switchboard has been powered on when determining that the response from the switchboard is the first response; and means for determining that a failure has occurred in the corresponding switchboard when there is no response to a subsequent response request signal within a certain period of time. [Industrial Application Field] The present invention relates to a switching system, and in particular, the identification of whether a switching board is installed or not, and the power ON/OFF status at the interface between a switching board control device and a switching board. This invention relates to a switchboard control device that performs the following operations. [Prior Art] Generally, a plurality of switchboards are installed depending on the scale of the exchange system that accommodates the switchboards, and are connected to the exchange air main body via a switchboard control device. FIG. 1 is a schematic configuration diagram illustrating the conventional switchboard control device. In the figure, NW is a switching network, SUB is a subscriber telephone, CC is a central control unit, TTY is a typewriter, TCTL is a switchboard controller, and T ₁ to _{T o} are switchboards. The switchboard control device TCTL is configured one-to-one or one-to-multiple with respect to the switchboard T, but in this embodiment, an example of one-to-multiple is shown. When the switching system is started up and becomes operational, and information on mounting/unmounting of switching boards is input as a command from a typewriter or the like, the central controller CC sends this information to the switching board controller TCTL. The switchboard controller TCTL tests the switchboard according to the sent mounting/non-mounting information. The power-on status (power on/off state) from each switchboard is sent to the switchboard controller TCTL via signal lines C ₁ to _Co and displayed on the display register Reg. Therefore, the switchboard controller TCTL sequentially sends response request signals assigned switchboard number numbers to the control line b for the switchboards whose previous mounted/unmounted information indicates "mounted" and whose power is turned on (turned on). If a response signal is not returned from each switch via control line a within a certain period of time, the switch without the response signal is recognized as a failure. Note that the communication lines are omitted in FIG. 1. [Problem to be solved by the invention] With the above control device, even if the switch board is installed by command, it is necessary to identify whether it is physically (metallic) installed or not. In addition to the control line, there is also a signal line that indicates the power-on status.
It requires C ₁ ~C _o and is not only uneconomical but also
As the number of replacement units increased, wiring work became complicated. An object of the present invention is to provide a switchboard control device that can determine the power-on status of each switchboard using a control line and detect failures. [Means for solving the problem] The present invention is a switchboard control device that exchanges control information with n switchboards (n is 1 or more). means for sequentially and repeatedly transmitting individual response request signals corresponding to each switchboard at regular time intervals; means for identifying a response from the switchboard to the response request signal; and means for identifying that the response from the switchboard is the first response; The system is equipped with means for recognizing that the switch has been powered on when it is determined that the switch has been powered on, and means for determining that a failure has occurred in the switch when there is no response to a subsequent response request signal within a certain period of time. [Operation] When the switchboard control device TCTL is powered on and started up, all of the switchboard mounting/unmounting information during IPL is set to the mounted state, and the switchboard power-on information is set to the OFF state. Next, a response request signal is sent to each switchboard, and responses are monitored for a certain period of time. When a response is detected within a certain period of time (first response), the power-on information is turned on. If a subsequent response is detected, it can be confirmed that the switchboard is normal. On the other hand, if there is no response within a certain period of time, it can be confirmed that a fault has occurred in the switchboard. [Embodiment] FIG. 2 is a schematic configuration diagram illustrating the switchboard control device of the present invention. In the figure, the same reference numerals as in FIG. 1 indicate the same objects. Note that S indicates a communication line. With this configuration, the present invention makes it possible to identify the power-on status of the switchboard and the failure status using the control lines a and b. FIG. 3 is a block diagram showing the relationship between the switchboard and the switchboard control device shown in FIG. 2 in further detail. In the figure, the call information from the switchboard T _i is transmitted via the standby subscriber circuit SLC, passes through a multiplexer/demultiplexer, and then takes the highway HW and is connected to the switchboard side network (in this example, time division is shown) NW. On the other hand, control lines a and b enter the board interface circuit BDI in the switchboard controller TCTL, and the control signals are controlled by the controller MPU and the memory MEM. The interface circuit IN on the highway HW consists of, for example, an inserter and a dropper circuit, and takes in or sends time slot information within a predetermined highway via the line interface circuit LNI, and communicates with the central control unit CC on the exchange side. It exists to exchange information. Under the above configuration, the switchboard controller TCTL initializes all the memory contents indicating the installed/unmounted information and the power-on status of the switchboards T ₁ to _{T o} at system start-up. After that, response request signals are sequentially sent to the switchboards T ₁ to _{T o} , and it is determined whether or not there is a response from the switchboard T _i within a certain time to the response request signal, and the power is turned on and the fault status is determined. Determine. FIG. 4 is a time chart illustrating the control device of the present invention. In the figure, the T _i side indicates the switchboard, TCTL indicates the switchboard control device, and the passage of time is shown from the top to the bottom. switchboard control device
When the TCTL is powered on and started up (IPL; initial program load), during the initial setting (at IPL), all the installed/uninstalled information on the switchboard is set to the installed state, and the power-on information (on the switchboard) is turned off. state. As shown below, a response request signal is sent to each switchboard T _i and responses for a certain period of time t are monitored. switchboard
If T _i is not powered on again, there is no response operation to this response request signal, so there is no response. Therefore, the switchboard controller TCTL detects that there is no response within a certain period of time and assumes that the switchboard is not powered on. When the switchboard T _i detects a response request signal for the first time after being powered on, it returns a response. The switchboard controller TCTL sends a response request signal and if a response is detected within a certain time,
Internal processing checks whether this response is the first response. In other words, if the current power-on status of switchboard T _i is OFF, it is determined that power has been turned on to switchboard T _i upon response from switchboard T _i (first response), and the power is turned on. Turn input information on. In the subsequent exchanges between the switchboard controller TCTL and the switchboard T _i , when a response is detected for sending a response request signal, the power-on information is on and there is a response, so the switchboard T _i is operating normally. You can confirm that. On the other hand, if a failure occurs in the switchboard T _i and the switchboard controller TCTL cannot send a response signal to the response request signal sent (no response), the switchboard controller TCTL will not respond within a certain period of time t. Since the power-on information is on and there is no response, it is known that a fault has occurred in the switchboard T _i . FIG. 5 shows a specific processing configuration of this control device, and particularly explains the operation of the memory MEM and the control section shown in FIG. 3. In the figure, memory
Mounting and unmounting information E of the switch board as information in MEM,
Power-on information P is stored in switchboard correspondence #0 to #n. R ₁ , R ₂ , R ₃ , and R ₄ are registers, C is a counter that counts for a certain period of time and sets the contents of register R ₄ to register R ₂ upon timeout, ALU is an arithmetic circuit, and CMP is a normal/abnormality determination circuit. . The numbers marked with O correspond to the processing shown in FIG. First, when the switchboard control device TCTL is initially started up, all the installed/uninstalled information E is set to the installed state (for example, set to "1", etc.), and all the power-on information P is set to the off state (for example, set to "0", etc.) be done. If the switchboard T _i has not yet been powered on, there is no response to the response request, so the power-on information E
The information set in read register _R1 (off state = “0”) and interface circuit BDI (third
As a result of calculating the information stored in the register R 2 from the register R ₄ to the register R ₂ (no response=“0”) at the time of timeout when no read information is detected (see figure) in the arithmetic circuit ALU, it is determined that there is no change. On the other hand, if a response is detected, register R ₁
Since there is a change (0→1) in the calculation result of the information "0" set in the register R2 and the information "1" (response) set in the register _R2 , the setting information (response) of the register _R3 is used as the first response. Power on state =
“1”) is stored in the corresponding area. Next, when the switchboard is normal, there is a response to the sending of the response request signal, and since the response is "1" when the power is turned on and the switch is "1", it is determined to be normal. If an abnormality occurs, a change is detected due to no response of "0" and it is determined that there is an abnormality. The following table shows this decision logic.

[Effect of idea]

As explained above, according to the present invention, it is possible to check the power-on status and failure occurrence status by detecting a response signal from the control line or detecting no response for a certain period of time, even if the switch board is not installed. Since it is no longer necessary to supply the conventional power-on information through a separate signal line, it is possible to realize switchboard control that is extremely economical and operationally effective. Furthermore, management by a central control device or the like becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram explaining a conventional switchboard control device, FIG. 2 is a schematic configuration diagram explaining the switchboard control device of the present invention, and FIG. 3 is an example of a system to which the present invention is applied. A detailed configuration diagram, FIG. 4 is a time chart of the control of the present invention, and FIG. 5 is a processing configuration diagram of the present invention. TCTL; switchboard controller, T ₁ ~ _{T o} ; switchboard,
a, b; control line, MPU; control unit, MEM; memory.

Claims (1)

[Scope of Claim for Utility Model Registration] In a switchboard control device that exchanges control information with n switchboards (n is 1 or more), immediately after the switchboard control device performs an IPL, the switchboard controller transmits information to each switchboard for all said switchboards. means for sequentially and repeatedly transmitting corresponding individual response request signals at regular time intervals; means for identifying a response from the switchboard to the response request signal; and determining that the response from the switchboard is the first response. An exchange characterized by comprising means for recognizing that the switch has been powered on, and means for determining that a failure has occurred in the corresponding switch when there is no response to a subsequent response request signal within a certain period of time. Base control device.