KR19990038594U - Output Highway Disable Device at Space Switch Board of Electronic Switching System - Google Patents

Abstract

The present invention relates to an electronic switch, in particular, when a function failure is detected on the space switch board itself, by disabling the output highway connected to the link board, PCM (Pulse Code Modulation) output from another space switch board on the link board The present invention relates to an output highway disable device in a space switch board of an electronic exchange.

In the conventional space switch board of the electronic switchboard, if a function error occurs, the call data is disconnected because the control data memory unit is reset regardless of the degree of the function error. There is a problem that the processing for the above is delayed.

The present invention enables the user to quickly select another space switch board by disabling the output highway in the event of a malfunction in the space switch board of the electronic switchboard, thereby quickly dealing with the function of the space switch board. Therefore, it is possible to prevent unnecessary reset of the control data memory unit, thereby preventing call disconnection at the electronic switchboard.

Description

Output Highway Disable Device on Space Switch Board of Electronic Switching System

The present invention relates to an electronic switch, in particular, when a function failure is detected on the space switch board itself, by disabling the output highway connected to the link board, PCM (Pulse Code Modulation) output from another space switch board on the link board The present invention relates to an output highway disable device in a space switch board of an electronic exchange.

In general, the electronic switch is composed of redundancy to improve the reliability. The space switch board and link board in the SSL board (Space Switch & Link Board) are also redundantly implemented, and between each space switch board and the link board. In the case of connected I / O highways, the intersection is redundant.

As described above, the SSL board implemented in redundancy in the conventional all-electronic exchanger includes the first and second space switch boards 12-1 and 12-2, and the first and second spaces as shown in FIG. 2 link boards 13-1 and 13-2, and device processors 11 for controlling the respective space switch boards 12-1 and 12-2 and link boards 13-1 and 13-2. It is done by

The respective space switch boards 12-1 and 12-2 perform a spatial division switching function on the PCM data of each channel input from the time switch board under the control of the device processor 11, and output the switched PCM data. Output to the side of each link board (13-1, 13-2) via the highway, as shown in Figure 2 of the accompanying drawings, the functional abnormality recognition unit 21, the alarm processing unit 22, And a signal analyzer 23, a plurality of output highway processors 24, a reset unit 25 and a control data memory unit 26. The function abnormality recognition unit 21 receives a clock or Detects a function abnormality in the corresponding switch board such as an interfacing with the device processor 11 and applies an alarm signal corresponding to the detected function abnormality content and the corresponding function abnormality to the alarm processor 22, and requests for reset according to the corresponding function abnormality. God The call is applied to the reset unit 25. The alarm processing unit 22 stores the function abnormalities applied from the function abnormality recognition unit 21 in its own register, and applies the corresponding alarm signal to the device processor 11 through the signal analysis unit 23. The signal analyzer 23 applies an alarm signal applied from the alarm processor 22 to the device processor 11 and a reset request signal applied from the device processor 11 to the reset unit 25. Each output highway processor 24 outputs PCM data on the switch board and a valid signal indicating a valid or invalid state of the PCM data through the output highway. To 2). The reset unit 25 generates a reset signal according to a reset request signal applied from the function abnormality recognition unit 21 or a reset request signal applied from the device processor 11 through the signal analysis unit 23 to control data. The memory unit 26 is reset, and the control data memory unit 26 stores control data necessary for switching and outputting PCM data of each channel in the switch board.

The respective link boards 13-1 and 13-2 respectively receive PCM data and valid signals inputted through output highways from the space switch boards 12-1 and 12-2, respectively, and receive the received validity signals. Selects PCM data from the space switch boards 12-1 and 12-2, which is a signal level indicating a valid state, and connects a path with a call.

The device processor 11 controls the operation of each of the space switch boards 12-1 and 12-2 and the link boards 13-1 and 13-2.

The corresponding valid signals generated in each of the space switch boards 12-1 and 12-2 of the conventional electronic switchboard configured as described above and output to the link boards 13-1 and 13-2 are added to the PCM data of each channel. One bit is allocated for each space. When the space division switching is performed by each space switch board 12-1 and 12-2, it is set as a signal of 'low' level, and the space division switching is not performed. Is set to the 'high' level signal.

However, when all the space switch boards 12-1 and 12-2 operate normally, the valid signals applied to the link boards 13-1 and 13-2 have the same level for each channel. Although it should be generated in a signal state, when one of the switch boards 12-1 and 12-2 operated in redundancy causes a malfunction in each of the validity signals, both valid signals are generated differently. have.

Here, when a function abnormality is sensed by the function abnormality recognition unit 21 of the first space switch board 12-1 among the corresponding space switch boards 12-1 and 12-2 implemented by redundancy, The function abnormality recognition unit 21 applies the alarm signal according to the occurrence of the function abnormality to the device processor 11 through the alarm processing unit 22 and the signal analyzing unit 23 and requests the reset unit 25 to reset it. Signal to reset the control data memory unit 26 in the first space switch board 12-1 to invalidate the valid signal for the PCM data output from the first space switch board 12-1. It will be converted to the signal level indicating the state.

In the conventional space switch boards 12-1 and 12-2 as described above, when the function abnormality recognition unit 21 detects a function abnormality, the space switch boards 12-1 and 12-2 each have their own function. The abnormality of the function is transmitted to the device processor 11 through the alarm processor 22 and the signal analysis unit 23, the functional abnormality recognition unit 21 is controlled regardless of the degree of functional abnormality of the switch board. By resetting the data memory unit 26, the switch board state is disabled so that the switch board itself cannot perform the space division switching function. The output highway processor 24 invalidates the valid signal. The signal is converted into a signal of a 'high' level indicating a state and output to the link boards 13-2 and 13-2.

However, such a countermeasure is not capable of interfacing with the instantaneous device processor 11 rather than the continuous function of the corresponding space switch boards 12-1 and 12-2, but reacts too sensitively to the momentary change of the clock. Since the control data memory unit 26 is unconditionally reset, it acts as a factor of degrading the performance of the electronic switchboard as a whole and poses a significant risk factor.

As described above, in the conventional space switch board of the electronic switchboard, if a malfunction occurs, the call is disconnected because the control data memory unit is reset regardless of the degree of the malfunction. In this case, the device processor processes the malfunction. Since there is a problem that the processing for the abnormal function is delayed.

The object of the present invention is to solve the problems described above, and its purpose is to disable the output highway itself so that the space switch board of the electronic switchboard can be immediately selected by selecting another space switch board. In addition, it is possible to promptly deal with the malfunction of the space switch board and to prevent unnecessary reset of the control data memory unit, thereby preventing call disconnection at the electronic switchboard.

Features of the present invention for achieving the above object, the function abnormality recognition unit 31 for detecting a functional abnormality in the space switch board and outputs an alarm signal according to the detected functional abnormality and the corresponding functional abnormality and ; An alarm processor (32) for storing the function abnormal contents applied from the function abnormality recognition unit (31) in its register and outputting an alarm signal applied from the function abnormality recognition unit (31); A signal analyzer 33 which applies an alarm signal applied from the alarm processor 32 to a device processor and receives and outputs a reset request signal from the device processor; A space switch board in an all-electronic switchboard having a control data memory section 37 for storing control data for switching and outputting PCM data of each channel, wherein an alarm signal is applied from the malfunction detection unit 31. An inverter 35 for inverting and outputting an inverted alarm signal; A reset unit 34 receiving a reset request signal applied from the signal analysis unit 33 to generate a reset signal and applying the generated reset signal to the control data memory unit 37; It includes a plurality of output highway processing unit 36 for transmitting the PCM data in the spatial switch board and a valid signal indicating the valid or invalid state of the PCM data to each link board through the output highway.

Each of the output highway processing units 36 performs an AND circuit 36-1 for performing an AND operation on the inverted alarm signal applied from the inverter 35 and the reset request signal applied from the reset unit 34, and outputs an AND product. )Wow; It determines whether to preset according to the signal applied from the AND circuit 36-1, and if the presetting is determined, converts the valid signal for the PCM data to a signal level indicating an invalid state and outputs it to each link board. D flip-flop (36-2) is characterized in that it comprises.

1 is a configuration block diagram of an SSL board implemented by redundancy in a conventional electronic switch.

FIG. 2 is a block diagram illustrating a configuration of a space switch board in FIG. 1. FIG.

Figure 3 is a block diagram of the output highway disable device in the space switch board of the electronic switch according to the present invention.

Explanation of symbols on the main parts of the drawings

31: abnormal function recognition unit 32: alarm processing unit

33: signal analysis section 34: reset section

35: inverter 36: output highway processing unit

36-1: AND circuit 36-2: D flip-flop

37: control data memory

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention in detail as follows.

The output highway disabling device in the space switch board of the electronic switching system according to the present invention has a malfunction detection unit 31, an alarm processing unit 32, and a signal analyzing unit 33 as shown in FIG. ), A reset unit 34, an inverter 35, a plurality of output highway processing units 36, and a control data memory unit 37.

The function abnormality recognition unit 31 detects a function abnormality in a corresponding switch board, such as a clock reception or an interfacing with a device processor, and applies the detected functional abnormality to the alarm processor 32 and at the same time according to the corresponding functional abnormality. The alarm signal is applied to the input terminals of the alarm processor 32 and the inverter 35.

The alarm processing unit 32 stores the function abnormality content applied from the function abnormality recognition unit 31 in its own register, and applies the corresponding alarm signal to the device processor through the signal analysis unit 33.

The signal analyzing unit 33 applies an alarm signal applied from the alarm processing unit 32 to the device processor, and applies a reset request signal applied from the device processor to the reset unit 34.

The reset unit 34 receives a reset request signal applied through the signal analyzer 33 to generate a reset signal, and applies the generated reset signal to the output highway processing unit 36 and the control data memory unit 37.

The inverter 35 inverts the alarm signal applied from the malfunction malfunction recognition unit 31 and applies it to the output highway processing unit 36.

Each output highway processor 36 transmits the PCM data on the corresponding switch board and a valid signal indicating the valid or invalid state of the PCM data to the respective link boards through the output highway, and is inverted from the inverter 35. The AND circuit 36-1 for performing an AND operation on the alarm signal and the reset request signal applied from the reset unit 34 and outputting an ANDed signal, and a signal applied from the AND circuit 36-1 are input to a preset input terminal (/). D flip-flop (36-2), which is inputted to PSET to determine whether to preset or not, and converts a valid signal for the PCM data to a signal level indicating an invalid state when the preset is determined. It is composed of

The control data memory unit 37 stores control data necessary for switching and outputting PCM data of each channel in the corresponding switch board.

The output highway disable operation of the space switch board of the electronic switch according to the present invention configured as described above is as follows.

First, when a function abnormality is detected by the function abnormality recognition unit 31 of the corresponding space switch board and the output highway is disabled, the corresponding function abnormality recognition unit 31 determines whether the corresponding space switch board receives a clock or not, and the device processor. Detects a function abnormality in the corresponding switch board, such as an error in interfacing with the controller, and if any one abnormality occurs, applies the function abnormality content to the alarm processor 32 and generates an alarm signal of a 'high' level. The alarm signal of the 'high' level is applied to the alarm processor 32 and the inverter 35.

Then, the alarm processing unit 32 applies the alarm signal of the corresponding 'high' level applied from the function abnormality recognition unit 31 to the signal analysis unit 33, and stores the function abnormality contents in its own register. The operator can quickly find the cause of the malfunction, and the signal analysis unit 33 applies the 'high' level alarm signal applied from the alarm processing unit 32 to the device processor, thereby causing a malfunction of the corresponding switch board. To check.

In addition, when the inverter 35 inverts the alarm signal of the 'high' level applied from the malfunction detection unit 31 and applies the alarm signal of the 'low' level to the input terminal of the AND circuit 36-1, the corresponding AND The circuit 36-1 combines and outputs the signal applied from the reset unit 34 and the signal applied from the inverter 35. The reset unit is applied because the signal applied from the inverter 35 is 'low' level. Irrespective of the signal applied from (34), a 'low' level signal is applied to the preset input terminal (/ PSET) of the corresponding D flip-flop 36-2.

Next, when the switch itself is reset or when the device processor determines that a reset is required, the device processor generates a reset request signal and disables the output highway. When the signal is applied to the reset unit 34 through the signal analysis unit 33, the reset unit 34 generates a reset signal of the 'low' level and generates a reset signal of the 'low' level generated by the AND circuit 36. And the AND circuit 36-1 outputs the OR signal from the reset unit 34 and the signal from the inverter 35 in a logical sum. Since the applied signal is at the 'low' level, the 'low' level signal is applied to the preset input terminal (/ PSET) of the corresponding D flip-flop 36-2 regardless of the signal applied from the inverter 35.

Accordingly, the D flip-flop 36-2 is outputted from the 'low' level alarm signal or the device processor inverting the 'high' level alarm signal applied from the malfunction detection unit 31 in the inverter 35. When the 'low' level signal is applied to the preset input terminal (/ PSET) by the corresponding 'low' level reset request signal, the preset driving is performed to drive the presetting. The valid signal is converted to a 'high' level indicating an invalid state, and a converted 'high' level valid signal is applied to each link board.

Accordingly, each link board ignores PCM data applied from the spatial switch board in which the corresponding valid signal is output at the 'high' level, and from another spatial switch board in which the valid signal is output at the 'low' level. It selects authorized PCM data and connects the route with a call.

On the other hand, when the reset request signal is applied to the reset unit 34 from the device processor, the reset unit 34 generates a reset signal and applies it to the output highway processing unit 36 and at the same time the control data memory unit 37 Since the control data memory unit 37 is reset, the space switch board cannot perform the space division switching function on its own.

As described above, in the space switch board of the electronic switch according to the present invention, if the function abnormality is detected by the function abnormality recognition unit 31 and generates a function error, an alarm signal is generated and outputted, and the output highway processor 36 outputs the corresponding alarm. Preset is driven by the alarm signal, and the high signal is sent to the link board until the corresponding alarm signal is released.The high signal is sent from the link board. Since any PCM data applied from the spatial switch board is ignored and PCM data is applied from another spatial switch board to which a low-level valid signal is transmitted, the path is connected to a call. Even if a function error occurs in the controller or the control data memory unit 37 is reset, Select PCM data that is to be continuously connected in the path in a call it is possible to minimize the cutting arc at the former electronic exchange.

As described above, the present invention enables to promptly select another space switch board by disabling the output highway itself in case of a malfunction in the space switch board of the electronic switchboard, thereby quickly dealing with the function of the space switch board. It is possible to prevent unnecessary reset of the control data memory section, thereby preventing call disconnection at the electronic switchboard.

Claims (2)

A function abnormality recognition unit 31 for detecting a function abnormality in the space switch board and outputting an alarm function according to the detected function abnormality content and the corresponding function abnormality; An alarm processor (32) for storing the function abnormal contents applied from the function abnormality recognition unit (31) in its register and outputting an alarm signal applied from the function abnormality recognition unit (31); A signal analyzer 33 which applies an alarm signal applied from the alarm processor 32 to a device processor and receives and outputs a reset request signal from the device processor; In the space switch board in an all-electronic exchange having a control data memory section 37 for storing control data for switching and outputting PCM data of each channel, An inverter 35 for inverting the alarm signal applied from the function abnormality recognition unit 31 and outputting the inverted alarm signal; A reset unit 34 receiving a reset request signal applied from the signal analysis unit 33 to generate a reset signal and applying the generated reset signal to the control data memory unit 37; And a plurality of output highway processor (36) for transmitting the PCM data in the spatial switch board and a valid signal indicating the valid or invalid state of the corresponding PCM data to each link board through the output highway. Output highway disable device in the space switch board of the electronic exchange. The method of claim 1, Each of the output highway processing units 36 performs an AND circuit 36-1 for performing an AND operation on the inverted alarm signal applied from the inverter 35 and the reset request signal applied from the reset unit 34, and outputs an AND product. )Wow; It determines whether to preset according to the signal applied from the AND circuit 36-1, and if the presetting is determined, converts the valid signal for the PCM data to a signal level indicating an invalid state and outputs it to each link board. And output flip-flop (36-2).