KR200283044Y1 - Apparatus for serial data transmission by subscriber line interface boards in a exchange system - Google Patents

Abstract

The present invention is to provide a serial data communication device of a switchboard subscriber board to perform serial transmission and reception data communication using the data port used in the subscriber control board without using the serial data port in the subscriber board of the ATM switch, A subscriber board generating a selection signal for indicating whether to use serial transmission / reception data to the subscriber control board, and transmitting / receiving serial data exchanged between the subscriber control board and itself to provide subscriber service; Generates a selection signal, selects one of the selection signals generated by each of the subscriber board and the plurality of boards including itself, and directly transmits / receives serial transmission / reception data according to the selected selection signal or among the plurality of subscriber boards. Including at least one subscriber control board for transmitting and receiving processing, it is possible to delete the serial port in the subscriber board is provided with a plurality of it has the effect of reducing the manufacturing cost and space efficiency of the exchange.

Description

Apparatus for serial data transmission by subscriber line interface boards in a exchange system}

The present invention relates to a subscriber board of an asynchronous transfer mode (Asynchronous Transfer Mode, or ATM) switch, and more particularly, to a serial data communication device of a switch subscriber board suitable for improving a method of communicating serial transmission / reception data of a subscriber board. It is about.

1 is a block diagram of an apparatus for serial data communication of an exchange subscriber board according to the prior art.

According to FIG. 1, an ATM switch is provided with a subscriber board 110 and a subscriber control board 120.

The subscriber board 110 is composed of a serial data port 111, a serial data drive 112, and a controller 113.

When receiving the serial data, the serial data received from the serial data port 111 connected to the monitor and the RS-232C cable is sent to the control unit 113 through the serial data drive 112. The control unit 113 processes the received serial data by receiving data.

In the serial data transmission process, when the control unit 113 sends serial transmission data to the serial data drive 112, the serial data drive 112 sends the serial data to the serial data port 111. The serial data port 111 is sent to the monitor through the RS-232C cable to perform the serial data transmission function.

The subscriber control board 120 is not only configured in the same manner as the subscriber board 110 described above, but also performs a serial data transmission / reception function in the same manner. However, according to the conventional serial transmission / reception data communication apparatus, there are the following problems.

First, the serial data port enters, leaving less space on the front of the subscriber board.

Second, the subscriber control board and the subscriber board must use the same function at the same time, which is inefficient.

Third, all subscriber boards have a serial data port, so many RS-232C cables and monitors are required.

The present invention was created to solve the above-mentioned conventional problems, and an object of the present invention is to use serial data transmission / reception data using a data port used for a subscriber control board without using a serial data port in a subscriber board of an ATM exchanger. It is to provide a serial data communication device of an exchange subscriber board to perform communication.

In order to achieve the above object, a serial data communication apparatus of an exchange subscriber board according to the present invention generates and transmits a selection signal for indicating whether to use serial transmission / reception data to a subscriber control board and between the subscriber control board and itself. A subscriber board for transmitting and receiving exchanged serial data to provide subscriber service; Generates a selection signal, selects any one of the selection signals generated by the subscriber board and the plurality of boards including itself, and directly transmits and receives serial transmission / reception data according to the selected selection signal; It characterized in that it comprises a subscriber control board to be applied to at least one of the subscriber board to transmit and receive.

1 is a block diagram of an apparatus for serial data communication of an exchange subscriber board according to the prior art.

2 is a block diagram of a serial data communication device of an exchange subscriber board according to an embodiment of the present invention;

3 is a detailed view of a serial data control unit and a subscriber board of the subscriber control board in FIG.

Explanation of symbols on the main parts of the drawings

200: subscriber board 210: serial data control unit

211: decoder 220: control unit

300: subscriber control board 310: serial data port

320: serial data drive 330: serial data controller

340: control unit 331: multiplexer

332: selection circuit 333: decoder

334 controller interface circuit

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment according to the present invention.

FIG. 2 is a block diagram of a serial data communication device of an exchange subscriber board according to an embodiment of the present invention, and FIG. 3 is a detailed view of the serial data controller and the subscriber board of the subscriber control board in FIG.

According to Fig. 2, in the present embodiment and the subscriber board 200 is composed of a serial data control unit 210 and a data processing unit 220.

The subscriber control board 300 includes a serial data port 310 for connecting serial transmission / reception data to various boards, a serial data drive 320 for converting serial data into a signal usable by the data processing unit 340, A serial data control unit 330 for receiving a plurality of serial data and selecting one serial data, and a data processing unit 340 for receiving, processing or creating and sending serial data.

In the subscriber control board 300, the serial data port 310 is implemented with an RS-232C connector, and the serial data drive 320 is implemented with a commercial chip (eg, MAX233). In addition, the subscriber control board 300 and the subscriber board are provided. In 200, the data processing units 220 and 340 are implemented with a general central processing unit (CPU).

In addition, although not shown in the drawings, there is a monitor related to the operation of the subscriber board 200. A monitor is a device that allows an operator to input / output serial transmission / reception data on a screen, for example, a cathode ray tube (CRT).

The monitor and the serial data port 310 are connected through an RS-232C cable, and data input by an operator is serially communicated through an RS-232C cable.

In the operation of receiving serial data, serial data received through the RS-232C cable is received through the serial data port 310 and then converted into the RS-232C format through the serial data drive 320. Data converted to the RS-232C format is sent to the serial data controller 330 to select whether to use the subscriber control board 300 or the subscriber board 200. As a result of the selection of the serial data controller 330, In case of using for the subscriber control board 300, the serial data is sent to the data processing unit 340 in the subscriber control board, and when using for the subscriber board 200, the serial data is sent to the control unit 210 in the subscriber board. Receive function will be performed.

Next, the serial data control unit 330 in the subscriber control board 300 will be described in more detail.

According to FIG. 3, the serial data controller 330 in the subscriber control board 300 includes a multiplexer 331, a subscriber control board 300, and a subscriber board 200 for selecting one serial data from a plurality of serial data. A selection circuit 332 for selecting any one of the selection signals made by each decoder 211 of the decoder, a decoder 333 for generating a desired selection signal with an address received from the data processing unit 340, and a subscriber control board to which it belongs. When the serial data to be used for 300 is selected, the controller 300 includes a controller interface circuit 334 for transferring the serial data to the data processing unit 340. Here, the multiplexer 331 and the decoder 333 may include an FPGA ( Field Programmable Gate Array).

In addition, the subscriber board 200 includes a decoder 211 and a data processor 220 serving as the serial data controller 210, and the functions of the subscriber board 200 include the data processor 340 described in the subscriber control board 300. And the function of the decoder 333.

In this configuration, when receiving the serial data, the received serial data is first applied from the monitor to the serial data controller 330 via an RS-232C cable, a serial data port 310 and a serial data drive 320. Serial data applied to the serial data controller 330 is input to the multiplexer 331.

The selection signal provided by the decoder 211 of the subscriber board 200 and the selection signal provided by the decoder 333 of the subscriber control board 300 are input to the selection circuit 332 of the subscriber control board 300. The selection circuit 332 selects one of two input signals.

When the selection signal selected by the selection circuit 332 is applied to the multiplexer 331, the multiplexer 331 provides serial data to the control unit interface circuit 334 in the subscriber control board 300 in accordance with the selection signal or the subscriber. It is provided to the data processor 220 in the board 200 to perform a reception function. In this case, when the serial data to be used for the subscriber control board 300 to which it belongs is selected, the corresponding serial data (Data_A) is transmitted to the control unit interface circuit 334, while the serial data to be used for the subscriber board 200 is transmitted. Is selected, the serial data Data_B is transmitted to the data processing unit 220 in the subscriber board 200. Referring to the transmission operation of the serial data, the multiplexer 331 determines that the data processing unit of the subscriber board 200 is selected. The serial data provided by 220 and the serial data provided by the data processor 340 of the subscriber control board 300 are respectively received. When the selection signal provided by the decoder 211 of the subscriber board 200 and the selection signal provided by the decoder 333 of the subscriber control board 300 are selected through the selection circuit 332, the multiplexer 331 is finalized. You will receive a selection signal.

The multiplexer 331 receiving the selection signal selects one of the two input serial data Data_A and Data_B input through different paths and sends the selected signal to the serial data drive 320. Serial data drive 320 then sends serial data to serial data port 310. The serial data thus transmitted is sent to the monitor via an RS-232C cable. The above-described embodiments are within the scope of various changes, modifications, and equivalents of the present invention. Therefore, the present invention is not limited to the description of the embodiments.

According to the serial data communication apparatus of the switch subscriber board of the present invention has the following effects.

First, the serial data port on the subscriber board is eliminated, which improves the space efficiency of the exchanger front panel.

Second, the board cost is lowered because serial data drives and ports in the subscriber board are deleted.

Third, the cables need to be connected to only one subscriber control board without the need to connect to multiple subscriber boards, reducing the number of cables and monitors, and improving the operator's work efficiency.

Claims (3)

A subscriber board generating a selection signal for indicating whether to use serial transmission / reception data to the subscriber control board, and transmitting / receiving serial data exchanged between the subscriber control board and itself to provide subscriber service; Generates a selection signal, selects any one of the selection signals generated by the subscriber board and the plurality of boards including itself, and directly transmits and receives serial transmission / reception data according to the selected selection signal; And a subscriber control board configured to apply and transmit and receive at least one of the subscriber boards. The method of claim 1, The subscriber control board includes a data port for inputting and outputting serial data; A data drive for converting serial data into a signal for use in a data processing unit; A data control unit for receiving a plurality of serial data and selecting one serial data according to a selection signal, and connecting the serial data to a subscriber control board belonging to the same or a data processing unit within the subscriber board connected thereto; It includes a data processing unit for transmitting and receiving serial data connected by the data control unit, The subscriber board includes: a data control unit for generating a selection signal and transmitting the selected signal to a data control unit of the subscriber control board when a process of transmitting / receiving serial data for subscriber service is required; And a data processor for transmitting and receiving serial data connected by said subscriber control board. The method of claim 2, wherein the data control unit of the subscriber control board, Decoding means for receiving an address of serial data transmitted and received by the data processor and generating a selection signal; Selecting means for selecting any one of the decoding means and a selection signal generated by the data controller in the subscriber board; Multiplexing means for receiving a selection signal selected by the selecting means and selecting any one of a plurality of serial data and transferring the selected signal to an interface means or a data processing unit in a subscriber board; And serial interface means for transferring serial data received from the multiplexing means to a data processing unit in a subscriber control board to which the multiplexing means belongs.