KR20040079182A - Remote power reset circuit at exchange system - Google Patents

Abstract

PURPOSE: A remote power reset device is provided to automatically perform a power reset control function by an upper processor or a remote device when a specific board within a digital exchange fails, thereby being applied to an unmanned system operation. CONSTITUTION: A DC/DC converter(21) converts an input power into a driving power, and supplies the driving power to a circuit portion(22). If the power is to be cut off owing to an abnormal state of the circuit portion(22), an upper processor(30) generates a control signal for power resetting, and supplies the control signal to a power reset controller(23). The power reset controller(23) temporarily cuts off the power supplied to the circuit portion(22) according to the power reset control signal, and recovers the power after a certain time elapses such that the power can be supplied to the circuit portion(22) again.

Description

Remote power reset circuit {Remote power reset circuit at exchange system}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote power reset device, and more particularly, to a remote power reset device that enables a reset control of a power source from a higher processor or a remote device when a normal board or a specific board failure occurs in a digital exchange.

Typically, a switching system is located at a telephone station, and performs switching operations for connecting a subscriber to a call or for connecting a subscriber's call to another switching system.

1 is a view showing a schematic connection configuration for a general digital exchange, the connection configuration, subscriber matching device 13 performing the aggregation function of the subscriber line, the unit switches capable of high-speed switching of several hundred Mbit A relay line matching device 12 for receiving a relay line connected to a switching network 11, another switching station or another network configured therein, a network synchronizer 14 for controlling the entire clock of the system, and a control processor 10 for controlling and managing them It can be configured as.

Devices that perform this particular function always perform the tasks under the control of the top processor board. Here, the various boards (Normal Board) in the digital exchange is driven by the DC power supplied, let's briefly look at the power supply of the board in the digital exchange according to the prior art.

2 is a block diagram showing a power supply of a board in a digital switch according to the prior art.

As shown in FIG. 2, a circuit board 22 in a board is configured in the normal board 20 in the digital exchanger, and a DC / DC converter for supplying driving power DC to the circuit board 22 in the board ( 21) is configured. In addition, the on-board circuit unit 22 is connected to an upper processor 30 which directly controls the on-board circuit (memory).

That is, DC-48V is first input to the input terminal of the DC / DC converter 21 to supply power to the in-board circuit unit 22. The DC -48V input as described above is converted to DC 5V, which is a driving voltage of the circuit board 22 in the board, through the DC / DC converter 21, and is supplied to the circuit board 22 in the board. In this case, power control by the upper processor 30 is not performed, and continuous power is supplied to the circuit unit 22 in the board through the DC / DC converter 21.

However, if each device does not recover due to unknown causes such as receiving error data from a large power station or an error of a commercial IC mounted on the board, the board may be in an abnormal state.

In this case, in most cases, the board is reset by the request of a switch reset by the upper processor, and the board may be recovered from the abnormal state. However, if the board is not recovered from the abnormal state, the board is directly remounted and remounted. There is a problem that the operator must perform manually. .

This phenomenon is more probable for boards that use commercial ICs, which are rapidly shortening their life cycles, and can also be a barrier in an increasingly unattended facility.

Accordingly, the present invention has been made to solve the above-mentioned problems according to the prior art, the object of the present invention, if a situation occurs that can be solved only by shutting off the power of a specific board in the digital exchange directly to the operator The present invention provides a remote power reset device that allows the board to be shut off and restored at the same time by remote control without dismounting and mounting the board.

1 shows a schematic connection configuration for a general digital exchange.

2 is a block diagram showing a power supply of a board in a digital switch according to the prior art.

3 is a diagram showing the pin configuration of the DC / DC converter in the power supply of the board in the digital exchange.

4 is a block diagram showing a device for remote power reset of a board in a digital exchange according to the present invention;

FIG. 5 is a block diagram illustrating a detailed block configuration of the power reset control unit illustrated in FIG. 4. FIG.

FIG. 6 is a diagram showing a detailed circuit configuration for each block shown in FIG. 5; FIG.

7 is a signal timing diagram for a change in output level after a power reset.

* Description of the symbols for the main parts of the drawings *

20: Board 21: DC / DC converter

22: circuit part on board 23: power reset control unit

23a: charge and discharge control unit 23b: DC power supply control unit

23c: discharge part

According to an embodiment of a remote power reset device according to the present invention for achieving the above object, a power reset device for a specific board in the digital switch, comprising: a power supply for supplying driving power to a specific board in the digital switch; A reset control signal supply unit which detects an abnormality in a specific board in the digital exchanger and provides a reset control signal for performing a reset function of power supplied to the specific board; The apparatus may include a power reset controller configured to reset the power of the power supply unit according to a reset control signal supplied from the reset control signal supply unit.

The reset control signal supply unit may include at least one of an upper processor or a remote monitoring apparatus of the specific board, and the power supply unit is configured as a DC / DC converter.

The power reset controller may include a charge and discharge controller configured to provide a power supply or shutdown signal according to a reset control signal supplied from the reset control signal supply unit; A power supply controller configured to control the power supply ON / OFF terminal of the power supply unit to charge and discharge the power according to a power supply or a disconnect signal provided from the charge / discharge controller; It may include a discharge unit for rapidly discharging the power of the board in accordance with the power supply or blocking signal supplied from the charge, discharge controller.

The charge / discharge control unit may include: a relay configured to switch according to a signal provided to control the power supply control unit and the discharge unit; And a relay driver for driving the relay according to the reset control signal provided from the reset control signal supply unit.

The power supply controller may include an RC circuit in which a resistor R and a capacitor C are connected in series to perform charge and discharge according to ON / OFF switching of a relay of the charge / discharge controller. The discharge unit may include a Schottky diode D configured to rapidly discharge and discharge the board power charged when the power supply unit cuts off the power supply according to the relay driving of the charge / discharge control unit.

Hereinafter, a preferred embodiment of a remote power reset device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a diagram illustrating a pin configuration of a general DC / DC converter in a power supply of a board in a digital exchanger. Referring to the pin configuration of the DC / DC converter 21, a power source for receiving power of DC -48V is shown. It consists of an input pin, an ON / OFF pin for ON / OFF control of the supply of DC power in the board, a pin for adjusting the output level of the DC power supplied into the board, and a DC power supply pin for supplying driving DC power in the board. Can be.

The configuration and operation of the remote power reset device according to the present invention including the DC / DC converter 21 shown in FIG. 3 will be described.

4 is a block diagram illustrating a remote power reset device of a board in a digital exchange according to the present invention.

As shown in FIG. 4, the remote power reset apparatus according to the present invention includes a DC / DC converter 21 and a power reset controller 23 in a specific board, and an upper processor 30 is connected to the specific board. It is composed.

The DC / DC converter 21 converts the input power (DC -48V) into the driving power (DC 5V) of the circuit in the board and provides it to the circuit part 22 in the board.

When an abnormal state occurs in the circuit part 22 on the board while being driven by the power supplied in this way, and the power supply is required to be shut off, the upper processor 30 generates a control signal for power reset to the power reset controller 23. to provide.

Accordingly, the power reset controller 23 controls the on-board DC power supply control ON / OFF terminal of the DC / DC converter 21 shown in FIG. 3 according to the power reset control signal provided from the upper processor 30. The power supplied to the circuit board 22 in the board is temporarily cut off, and then restored after a predetermined time so that power is supplied to the circuit board 22 in the board. That is, the power reset control unit 23 resets the DC / DC converter 21 according to the power reset control signal provided from the upper processor 30.

Here, a detailed operation of the power reset controller 23 illustrated in FIG. 4 will be described with reference to FIGS. 5 to 7.

FIG. 5 is a diagram illustrating a detailed block configuration of the power reset controller shown in FIG. 4, FIG. 6 is a diagram illustrating a detailed circuit configuration of each block illustrated in FIG. 5, and FIG. 7 is a diagram illustrating an output level after a power reset. Signal timing diagram for change.

As shown in FIG. 5, the power reset controller 23 may include a charge and discharge controller 23a, a DC power supply controller 23b, and a discharge unit 23c.

The charge / discharge control unit 23a provides a power supply or cutoff signal to the DC power supply control unit 23b according to the reset control signal provided from the upper processor 30.

The DC power supply control unit 23b controls the DC power supply ON / OFF control terminal of the DC / DC converter 21 shown in FIG. 3 according to the power supply or cutoff signal provided from the charge / discharge control unit 23a. Perform charging and discharging of the power supply.

The discharge unit 23c performs a sudden discharge of the board power when the power is turned off.

The detailed circuit configuration of the power reset circuit 23 having such a configuration is shown in FIG. That is, as shown in FIG. 6, the charge / discharge control unit 23a switches according to a signal provided to control the DC power supply control unit 23b and the discharge unit 23c. And a relay driver 23a-1 for driving the relay 23a-2 according to the reset control signal provided from the upper processor 30.

In addition, the DC power supply control unit 23b is composed of an RC circuit that performs charging and discharging according to ON / OFF switching of the relay 23a-2. Here, the resistor R and the capacitor C are connected in series with each other.

In addition, the discharge unit 23c may include a Schottky diode for discharging and discharging the charged board power when the power is cut off according to the switching of the relay 23a-2 in the charge and discharge control unit 23a (D). It can be made of).

A detailed operation of the remote power reset device according to the present invention having such a configuration will be described.

First, as shown in FIG. 6, the charge / discharge control unit 23a sets the reset control signal provided from the upper processor 30 as an input (Active Low). That is, the relay driver 23a-1 of the charge / discharge control unit 23a outputs the inverted signal LOW of the signal input to the IN1 (HIGH) input terminal to the OUT1 terminal when the input trigger is input from the upper processor 30. do. The state is maintained here until the relay driver is reset.

The relay 23a-2 is driven by the signal output to the OUT1 terminal of the relay driver 23a-1, and as the switching unit of the relay 23a-2 is turned on, that is, the DC power supply controller 23b. Then, the GND status signal is transmitted to the input of RC circuit.

Before the relay 23a-2 is driven, the RC circuit charged up to the voltage level of the ON / OFF terminal of the DC / DC converter 21 shown in FIG. 3 is discharged by the relay drive (GND state). .

This serves to raise the input of the ON / OFF terminal of the DC / DC converter 21 to the GND level.

Here, the relay 23a-2 of the charge / discharge control unit 23a usually has a release time of about 2 ms, and the DC power supply control unit 23b uses the RC circuit so that the discharge time is faster than this time. It must be configured to rise to the GND level.

Usually, the voltage level of the ON / OFF terminal of the DC / DC converter 21 is equal to the converted DC voltage level (-48V) value, the power is cut off when it is + 2V or more above this level value. Since the voltage level of the ON / OFF terminal of the DC / DC converter 21 has risen to the GND level by the RC circuit 23b, the DC / DC converter 21 is turned off and the DC / DC The power supply from the converter 21 to the board is cut off.

The Schottky diode D of the discharge unit 23c shown in FIG. 6 has a faster drop of the voltage charged on the board when the power supply from the DC / DC converter 21 is cut off. ). At this time, when the power supply to the board is cut off from the DC / DC converter 21, the power of the relay driver 23a-1 of the charge, discharge controller 23a is also cut off.

Therefore, the signal output from the OUT1 terminal of the relay driver 23a-1 to the relay 23a-2 is output again to the initial value HIGH, and the relay 23a is output according to the signal output from the relay driver 23a-1. The driving of -2) is cut off, and the capacitor C of the DC power supply control unit 23b starts to be charged again by the relay output in the float state.

As such, when the power of the capacitor C of the DC power supply controller 23b is charged from -48V to + 2V or less, the DC / DC converter 21 is driven again to board the input DC input power (-48V). Is converted to the driving voltage (5V), and the supplied DC power is resupplied to the circuit unit 22 in the board.

To summarize this operation with reference to FIG. 7, the input level of the ON / OFF terminal of the DC / DC converter 21 is -48V before the relay 23a-2 of the charge / discharge control unit 23a is turned on. When the signal is raised to the GND level by the relay 23a-2 ON operation, the on-board power is turned off as shown in the waveform shown in FIG. That is, since the power supply of the relay 23a-2 and the relay driver 23a of the charge / discharge control unit 23a is turned off, the output of the relay 23a-2 is floated, which causes RC of the DC power supply control unit 23b. The circuit is charged.

Subsequently, when the charge level of the RC circuit 23b falls below -48V (input DC voltage) + 2V or less, the DC / DC converter 21 is driven, and the circuit part on the board is driven by the DC / DC converter 21. The power is supplied to 22 again.

As a result, in the remote power reset apparatus according to the present invention, when an abnormality occurs in a specific board in the digital exchange, the mechanical interruption of the relay 23b-2 of the charge / discharge control unit 23a by the control of the upper processor 30 is performed by DC / DC. The discharge trigger is provided to the ON / OFF terminal control RC circuit 23c of the converter 21, and the electric power charged by the RC circuit 23c is discharged by the discharge trigger provided.

After the power supply is cut off from the DC / DC conversion section 21 to the circuit board 22 on the specific board by the discharge of the RC circuit 23c, and after a certain time elapses after the discharge is performed by the RC circuit 23c, In addition, the capacitor of the RC circuit 23c is charged, and when the charge is made to a predetermined level, the power is supplied from the DC / DC converter 21 to the circuit board 22 in the board again.

In the above embodiment, only an embodiment in which the power reset function is performed by the upper processor of the specific board in the digital switchboard is described. For example, a person with ordinary knowledge in this field can easily understand that a power reset control signal is received by a HMI (Human Machine Interface) to perform a reset function of a power supply to a specific board in which an abnormal condition has occurred. It is part.

In the remote power reset device according to the present invention as described above, the power supplied to a specific board in the digital exchange is cut off by the control of the upper processor or the remote device, and at the same time, the automatic power supply is performed after a few seconds. In other words, when an abnormality occurs in a specific board in the digital switchboard, the operator directly cuts off and re-supplies the power supply (reset function) by directly removing or mounting the board. However, in the present invention, the power is automatically reset by an upper processor or a remote device. By enabling the control, it has an effect that can be usefully applied to the unmanned operation of the system.

Claims (4)

In the power reset device of a specific board in the digital exchanger, A power supply unit supplying driving power to a specific board in the digital exchanger; A reset control signal supply unit which detects an abnormality in a specific board in the digital exchanger and provides a reset control signal for performing a reset function of power supplied to the specific board; And a power reset control unit for performing a power reset of the power supply unit according to a reset control signal supplied from the reset control signal supply unit. The method of claim 1, The reset control signal supply unit, And at least one of an upper processor or a remote monitoring device of the specific board. The method of claim 1, The power reset control unit, A charge and discharge control unit configured to provide a power supply or shutdown signal according to a reset control signal supplied from the reset control signal supply unit; A power supply controller configured to control the power supply ON / OFF terminal of the power supply unit to charge and discharge the power according to a power supply or a disconnect signal provided from the charge / discharge controller; Remote power reset device including a discharge unit for rapidly discharging the power of the board in accordance with the power supply or cut-off signal supplied from the charge, discharge controller. The method of claim 4, wherein The charge and discharge control unit, A relay for switching in accordance with a signal provided to control the power supply control unit and the discharge unit; And a relay driver for driving the relay according to a reset control signal provided from the reset control signal supply unit.