KR100422142B1 - voltage checking device of the keep-phone system - Google Patents

Abstract

According to the present invention, a voltage checking unit for detecting abnormalities of internal functional circuit units is provided on rack boards of a keep phone, and according to a signal for determining abnormality of functional circuit units of each rack board detected by the voltage checking units. A main processor block for outputting a cutoff control signal for shutting off power input to the corresponding functional circuit part, and a relay for blocking power input to the corresponding functional circuit part of the rack board according to the cutoff control signal of the main processor block through the corresponding relay; Provided is a voltage checking device of a keepphone system comprising a control unit.

The present invention as described above, by installing a current detector in each of the keeppone rack consisting of a multi-layer to detect the voltage abnormality of the power supply and slots and the external terminal of each rack to cut off the power of the corresponding part, Since the other functional circuits are protected from abnormal conditions, the system functionality is improved accordingly. Also, only the specific functional circuits in which an abnormality has occurred is selected and the corresponding power supply is cut off. It also significantly improves the operating reliability of the system.

Description

Voltage checking device of the keep-phone system}

The present invention relates to a voltage checking device of a keepphone system. In particular, a current detection unit is installed in each keepphone rack configured in a multi-layer to detect power abnormality of each rack and slots and an external terminal to cut off the power of the corresponding part. By doing so, it is related to the voltage checking device of the keep phone system to improve the functionality of the system, so that the other functional circuit parts are protected from the abnormal state of the specific portion of the keep phone.

In general, as the industrial society develops, information communication systems are widely used to transfer data from one point to another desired more appropriately and quickly. Such communication systems are usually homogeneous or heterogeneous communication devices which are geographically dispersed. In most cases, information devices are connected to a network to enable sharing and communication of resources. In the network, a switch is usually used to exchange information converted into an electrical signal with a counterpart, and is divided into a subscriber transmission connecting a subscriber and an exchange and a transmission between stations connecting an exchange period.

In particular, various types of systems are currently developed and used in the exchange system for subscriber transmission in terms of large facility capacity, and a simple exchange system for a building or a small subscriber among such exchanges is now widely used. In addition, such a conventional simple exchange system, for example, a keep-phone, a board having necessary functions is inserted into a mother board, and each of these motherboards is combined according to a subscriber or other capacity. It constitutes a rack.

Then, the conventional keep phone as shown in Figure 1 is largely connected to the external extension or trunk line as shown in Figure 1 and the second rack board (70, 71) and the first and second rack board ( 70 and 71 are electrically connected to the main rack board 72 to control the switching action and the function of the keep phone.

In addition, the first rackboard 70 includes a predetermined number of universal slots 74 into which external CO lines or extension cards 73A can be inserted, and a first rack including the universal slots 74. Back-plane (back-) which is a passage through which the switching signal is connected to each of the power supply unit 75 for supplying the operating power to the board 70 and the CO line or the extension card 73 inserted in the universal slot 74. phane) interface line 76, a transformer 78 for separating a signal switched through the backplane interface line 76 from the module jack 77, and each relay 79 installed in the universal slot 74; And a link module unit 81 for connecting the second and second rack boards 71 to the signal moving through the backplane interface line 76 to control them.

In addition, the universal slot 74 includes a card edge connector 82 which transmits a signal of an extension or trunk line card 73 inserted in a predetermined number through the backplane interface line 76, and the card edge connector 82. Each of the relay 79 is provided with a relay for controlling the power supply.

Here, the second rackboard 71 and the main rackboard 72 is also substantially the same as the components of the first rackboard 70, but can control the overall function of the keep phone on the main rackboard (72) The main processor block 83 is provided to control the functions of the first and second rackboards 70 and 71.

In addition, the backplane interface line 76 is connected to enable all communication between the rack boards 70-72 through the link module unit 81, the module jack 77 formed on each rack board (70-72) Each subscriber's terminal 84 is connected.

Meanwhile, referring to the operation of the conventional keep phone as described above, first, when the keep phone is set up, the power units 75, 85, and 86 of each rack board 70-72 supply operating power to the rack boards 70-72. Authorize it. At this time, if a call connection signal is input from an external exchange (not shown), the call connection signal is input to the transformer 78 via the module jack 77. Accordingly, the transformer 78 inputs the incoming call connection signal into the corresponding CO line card 73A inserted into the universal slot 74 via the backplane interface line 76 after matching impedance. At this time, the signal is also input to the main processor block 83 through the backplane interface line 76 and the link board unit 81. The main processor block 83 judges the input call connection signal and relay control unit ( The control signal is applied through 80). Then, the relay control unit 80 is connected to the relay 79A of the corresponding CO line card 73A of the universal slot 74 and the corresponding relay 79N of the station card 73N to be connected to the CO line card 73A. Switch to power on. Accordingly, as the relays 79A and 79N are operated, call power is supplied to the corresponding card edge connectors 82A and 82N, so that the corresponding card edge connectors 82A of the CO line card 73A of the universal slot 74 are provided. A call connection signal is input to the card edge connector 82N of the extension card 73N, so that the call connection signal, for example, the voice traffic signal, is signal-matched via the transformer 78 via the backplane interface line 76. Then, the call connection signal matched by the transformer 78 is input to the wired telephone 84 via the module jack 77.

However, since the conventional keep phone as described above does not have a power checking means for checking an abnormal state of the power supply therein, a specific board, for example, an extension or trunk line card or a power supply unit 75 or 85 inserted into the universal slot 74. , 86), the other racks (70-72) affects, if the main processor block (83) detects this and can not take appropriate action, so that the function of some boards malfunctions This occurred.

In addition, in the conventional keep phone as described above, when an overvoltage is generated in an external terminal 84, the generated overvoltage is input to the rack board 70-72 through the module jack 77. Accordingly, the problem that the rack board 70-72 of the keep phone is broken.

Accordingly, the present invention has been invented to solve the above-mentioned problems, by installing a current detector in each keeppone rack configured in a multi-layer to detect the voltage abnormal state of the power supply and slots of each rack and the external terminal It is an object of the present invention to provide a voltage checking device of a keep phone system, by which power is cut off, so that other functional circuit parts are protected from abnormal conditions of a specific portion of the keep phone, thereby improving the functionality of the system.

Another object of the present invention is to select only a specific functional circuit unit in which an abnormality is generated, so that the corresponding power supply is normally operated so that other functional circuit units in which the abnormality is normally operated accordingly, the voltage checking device of the keep phone system significantly improves the operation reliability of the keep phone system. To provide.

The present invention for achieving the above object is provided with a voltage checking unit for detecting the presence or absence of abnormality of the internal functional circuits, respectively provided in the rack boards, and the abnormal presence or absence of functional circuits of each rack board detected by the voltage checking unit A main processor block that outputs a cutoff control signal for shutting off power input to the corresponding functional circuit part of the rack board according to the determination signal, and a power input to the corresponding functional circuit part of the rack board according to the cutoff control signal of the main processor block. Provided is a voltage checking device of a keep phone system consisting of a relay control unit for blocking through a corresponding relay.

1 is an explanatory diagram illustrating a conventional keep phone system.

2 is an explanatory diagram illustrating an apparatus of the present invention.

3 is an explanatory diagram illustrating a voltage checking device of the present invention device.

<Detailed Description of Codes>

1: first rack board 2: second rack board

3: main rack 4: universal slot

5A-C: Power Supply 6A-N: Card

7: Backplane Interface Line 8: Module Jack

9: transformer 10A-N: relay

11: relay control unit 12: link module unit

13: Voltage checker 14A-N: Card edge connector

15: Main Processor Block 16: Phone

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, a key phone equipped with the present invention includes a first and a second rack boards 1 and 2 that are connected to an external extension or trunk line to perform a switching action, and the first and second rack boards 1 and 2. FIG. 2) is divided into a main rack board (3) which is connected to the electrical circuit and controls the switching action and the function of the keep phone as a whole.

The first rackboard 1 includes a predetermined number of universal slots 4 into which external trunk lines or extension cards A can be inserted, and the first rackboard 1 including the universal slots 4. Backplane which is a path through which the switching signal is connected to each of the power supply units 5A-C for supplying operating power to the power supply unit and the CO lines or the extension cards 6A-B inserted in the universal slot 4. -phane) an interface line (7), a transformer (9) separating the signal switched through the backplane interface line (7) from the module jack (8), and each relay (10A) installed in the universal slot (4). A relay control unit 11 for controlling N, a link module unit 12 for connecting a signal moved through the backplane interface line 7 with a second rack board 2, and the power supply unit 5A-. C) and transformer (9) and universal slot (4) to check the voltages of these (4,5A-C, 9) At least it comprises a voltage-checking unit 13 for detecting the presence or absence.

In addition, the universal slot 4 is provided with card edge connectors 14A-N for transmitting signals of the extension or trunk line cards 6A-N inserted in a predetermined number through the backplane interface line 7, respectively. The rear ends of the card edge connectors 14A-N are provided with relays 10A-N for controlling the power supply. In addition, each of the card edge connectors 14A-N is connected to the voltage checking unit 13.

Here, the second rack board (2) and the main rack board (3) is almost the same as the components of the first rack board (1), but is input from the voltage checking unit 13 to the main rack board (3) The main processor block 15 for controlling the power cutoff control function and the function of the keep phone as a whole according to whether there is an abnormality in the function circuit part by determining the detection signal is provided to function the first and second rack boards 1 and 2. To control.

The voltage checking unit 13 includes a comparator 16 as shown in FIG. 3, wherein the inverting terminal of the comparator 16 is supplied from the power supply unit 5C of the main rack board 3. For example, 5 [V] is distributed and supplied by the resistors R1 and R2, and the inverting terminal of the comparator 16 has a corresponding functional circuit portion requiring detection of abnormality, for example, each rack board 1-3. The operating voltages of the power supply units 5A-C, the universal slot 4, and the transformers 9 of, for example, 30 [V] are distributed and input by the resistors R3 and R4. Here, a plurality of comparators 16 of the voltage checking unit 13 may be provided for each functional circuit unit in order to detect abnormalities of the plurality of functional circuit units of the rack boards 1-3.

The voltage checking unit 13 may include a comparator capable of detecting an overcurrent or an overvoltage by the external terminal 16.

In other words, the apparatus of the present invention is provided on the rack boards (1-3), respectively, a voltage checking unit (13) for detecting the abnormality of the internal functional circuit units (4, 5A-C, 9), and the voltage checking unit A main processor block 15 for outputting a cutoff control signal for shutting off power input to the corresponding functional circuit part of the rack board in accordance with the abnormality determination signal of the functional circuit parts of each of the rack boards 1-3 detected by (13); ) And a relay control unit 11 for blocking power inputted to the corresponding function circuit unit of the rack board through the corresponding relay according to the blocking control signal of the main processor block.

In addition, the backplane interface line 7 is connected to enable all communication between the rack boards (1-3) through the link module unit 12, the module jack (8) formed on each rack board (1-3) Each subscriber's terminal 16 is connected.

Next, the operation and effect of the apparatus of the embodiment of the present invention as described above will be described.

According to the present invention, when the keep phone is set up, the power supply units 5A-C of each rack board 1-3 provide operating power to the rack boards 1-3 in a normal manner, for example, 30 [V]. ] Is authorized. At this time, if a call connection signal is input from an external exchange, the call connection signal is input to the transformer 9 via the module jack 8, and accordingly, the transformer 9 matches the input call connection signal with impedance. Then via the backplane interface line 7 is input to the corresponding CO line card 6A inserted in the universal slot (4). At this time, this signal is also input to the main processor block 15 of the main rack board 3 through the backplane interface line 7 and the link board unit 12. The main processor block 15 is connected to the input call connection. By determining the signal and applying the control signal through the relay control unit 11, the station card 6N which wants to connect the call with the relay 10A of the corresponding CO line card 6A of the universal slot 4 and the CO line card 10A. Switching so that power is supplied to the corresponding relay 10N, the normal call processing is performed.

At this time, the main processor block 15 of the main rack board 3 is connected to the functional circuits of the rack boards 1-3 through the voltage checking units 13 provided on the rack boards 1-3. Then, the operation power is detected from the power supply unit 5A-C and the universal slot 4 or the transformer 9 to check for abnormality.

That is, each of the operating voltages of the functional circuit portions of the respective rack boards 1-3 is, for example, normally 30 [V] to be input to the non-inverting terminal of the comparator 16 of the voltage checker 13, respectively. The comparator 16 of the voltage checking section 13 compares the detection signals respectively inputted from the functional circuit sections with the reference voltages input from the power supply section 5C of the main rack board 3, respectively. Input to processor block 15.

For example, if any one of the built-in cards of the universal slot 4 of the second rack board 2 is abnormally generated, the comparator 16 of the voltage checking unit 13 compares the signals. The operating voltage is input lower than the reference voltage input to the inverting terminal from the card edge connector 14N of the extension card 6N in which the abnormality inputted to the non-inverting terminal of 16). Then, the comparator 16 compares the reference voltage supplied from the power supply 5C of the main rack board 3 with the voltage signal input from the card edge connector 14N and inputs the output to the main processor 15. Let's go.

Therefore, the main processor 15 determines the output signal of the comparator 16 of the voltage checking unit 13 inputted, and the corresponding card having an abnormality through the relay control unit 11 of the second rack board 2. By controlling the contact of the relay 10N connected to the edge connector 14N to cut off the power from the power supply 5B, the malfunction of the functional circuits of the other rack boards 1 and 2 is prevented.

Here, even if the power supply unit 5B of the second rack board 2 is broken, the non-inverting voltage of the comparator 16 of the voltage checking unit 13 is lower than the reference voltage, so that the main processor block 15 Recognizes this and does not access the second rack board 2 where a failure has occurred.

On the other hand, if an abnormality, for example, an overvoltage occurs in the terminal 16 connected to the module jack 8 of the rack boards 1-3 and is input to the transformer 9 via the module jack 8, As such, the voltage checking unit 13 detects this and inputs it to the main processor block 15. Then, the main processor block 15 determines the detection signal of the input voltage checking unit 13 and recognizes that an abnormality has occurred outside the current keep phone system, thus relaying the rack board 1-3 connected with the corresponding terminal. The control unit 11 controls the contact point of the relay 10A-N connected to one end of the transformer 9, thereby protecting the keepphone system by blocking an overvoltage input from the outside.

As described above, the present invention installs a current detector in each keeppone rack configured as a multi-layer to detect a voltage abnormality of a power supply unit, slots, and an external terminal of each rack to cut off the power of the corresponding part. Since other functional circuit parts are protected from abnormal state of the part, there is an advantage of improving the functionality of the system accordingly.

In addition, according to the present invention, since only the specific function circuit unit in which an abnormality is generated is cut off the corresponding power supply, other functional circuit units in which the abnormality is normally operated have an effect of significantly improving the operation reliability of the keep phone system.

Claims (2)

First and second rackboards connected to external stations or trunk lines for switching, and the main rackboards connected to the first and second rackboards in electrical circuits to control the switching and keep functions of the keep phone as a whole. In the keep-alive made up of Each of the rack boards is provided with a voltage checking unit for detecting an abnormality of internal functional circuit units, and the function circuit unit of the rack board according to the abnormality determination signal of the functional circuit units of each rack board detected by the voltage checking unit. A main processor block for outputting a cutoff control signal for shutting off input power, and a relay controller for cutting off power input to the corresponding functional circuit part of the rack board through the corresponding relay according to the cutoff control signal of the main processor block. A voltage checking device for a keepphone system. The keep phone according to claim 1, wherein the voltage checking unit includes a comparator for comparing a reference voltage supplied from a power supply unit of the main rack board with a voltage signal input from the rack board and inputting the output to the main processor. Voltage checking device of the system.