KR20000004866U - Module of transceiver - Google Patents

Abstract

The present invention improves economic efficiency by selecting a board to be monitored by a multiplexer and configures one RS-232 transceiver separately from the board, thus improving economic efficiency and including an isolation part so that static electricity and power surge The present invention relates to a module of a transceiver for preventing damage to a system.

The module of the transceiver of the present invention includes a plurality of boards having a TTL, a selection switch unit for outputting a selection reference signal for selecting the signals of the TTL, and fewer TTL signals than the number of the boards are selected by the selection reference signal. A multiplexer that inputs / outputs a TTL and a signal, an isolation part that inputs / outputs a signal with the multiplexer and electrically isolates input signals from the outside, and a transceiver that inputs / outputs an input / output with the isolation part and converts input signals into a predetermined voltage. And a plurality of terminals mutually input / output with the transceiver.

Description

Module of transceiver

The present invention relates to a module of a transceiver, and more particularly, to a module of a transceiver for preventing damage to a system and improving economic efficiency.

A module of a transceiver according to the prior art is input / received with a plurality of boards 11 having an RS-232 transceiver 14 and an RS-232 transceiver 14 of the board 11 as shown in FIG. It consists of the terminal 12 which outputs.

Here, each board 11 is composed of a serial I / O interface (SIO) chip 13 and an RS-232 transmitter and receiver 14 for inputting / outputting the SIO chip 13.

Referring to the operation of the transceiver module according to the prior art configured as described above are as follows.

First, the RS-232 cable of the terminal 12 is connected to a board 11 to be monitored among the plurality of boards 11 included in a private branch exchange (PBX).

The RS-232 transceiver 14 converts the output signal LTX of the SIO chip 13 to an RS-232 level, i.e., 0 / -12V, and then converts the converted signal RSTX into the RS-232 transmitter / receiver. Output to terminal 12.

In the reverse operation, the RS-232 transceiver 14 converts the output signal RSRX of the terminal 12 to the level of the SIO chip 13, and then converts the converted signal LRX into the SIO chip. Output to (13).

However, the module of the conventional transceiver has to connect the RS-232 cable directly to the board, so it is difficult to monitor the board in the field, and each board has a built-in RS-232 transceiver for monitoring the board. Therefore, there was a problem that the economic efficiency, such as cost increases.

The present invention improves economic efficiency by selecting a board to be monitored by a multiplexer and configures one RS-232 transceiver separately from the board, and includes an isolation unit to prevent damage to the system due to static electricity and power surge. The purpose is to provide a module of the transceiver to prevent.

1 is a block diagram showing a module of a transceiver according to the prior art.

2 is a block diagram showing a module of a transceiver according to an embodiment of the present invention

Explanation of symbols for main parts of the drawings

31: Board 32: Multiplexer

33: selection switch section 34: isolation section

35: RS-232 transceiver 36: terminal

The module of the transceiver of the present invention includes a plurality of boards having a TTL, a selection switch unit for outputting a selection reference signal for selecting the signals of the TTL, and fewer TTL signals than the number of the boards are selected by the selection reference signal. A multiplexer that inputs / outputs a TTL and a signal, an isolation part that inputs / outputs a signal with the multiplexer and electrically isolates input signals from the outside, and a transceiver that inputs / outputs an input / output with the isolation part and converts input signals into a predetermined voltage. And a plurality of terminals mutually input / output with the transceiver.

When described in detail with reference to the accompanying drawings a preferred embodiment of the module of the transceiver according to the present invention as follows.

As shown in FIG. 2, a module of a transceiver according to an embodiment of the present invention inputs / outputs a plurality of boards 31 having a TTL (Transistor Transistor Logic) and TTLs of the board 31 and outputs four output signals. A multiplexer 32 for outputting, a selector switch 33 for outputting a selection reference signal for selecting four of the TTL output signals of the board 31 to the multiplexer 32, the multiplexer An isolation unit 34 which mutually inputs / outputs with (32), an RS-232 transmitter / receiver 35 which inputs / outputs mutually with the isolation unit 34, and mutual input / output with the RS-232 transmitter / receiver 35, respectively. It consists of four terminals 36.

Referring to the operation of the transceiver module according to the embodiment of the present invention configured as described above are as follows.

First, the multiplexer 32 is a TTL output signal of the four boards 31 selected by the selection reference signal of the selection switch unit 33 among the TTL output signals LTX of the board 31 included in the PBX. MTXs are output to the isolation unit 34.

The isolation unit 34 electrically isolates the TTL output signals MTX of the selected four boards 31 from the outside, that is, the RS-232 transceiver 35 and the terminal 36, and then isolates the isolation. Four output signals ITX are outputted to the RS-232 transceiver 35.

Subsequently, the RS-232 transmitter / receiver 35 outputs four output signals ITX of the isolation unit 34 having the TTL level, that is, 0V / 5V, respectively, to the RS-232 level, that is, 0V / -12V. Then, the signals RSTX are output to the four terminals 36, respectively.

On the other hand, the RS-232 transceiver 35 receives the four output signals (RSRX) of the terminal 36 of the RS-232 level and converts the signals into signals (IRX) of TTL level, respectively. Next, the signals IRX are output to the isolation unit 34.

The isolation unit 34 electrically isolates the output signals IRX of the four RS-232 transmitters 35 from the outside, that is, the board 31 and the multiplexer 32, and then isolates the four. Output signals MRX are output to the multiplexer 32.

Next, the multiplexer 32 allocates and outputs four output signals MRX of the isolation unit 34 to the selected four boards 31.

The module of the transceiver of the present invention selects a board to be monitored by a multiplexer, and configures one RS-232 transceiver separately from the board and includes an isolation unit, so that the cable of the terminal is connected to the board to be monitored as in the prior art. This eliminates the difficulty of eliminating the need for a single RS-232 transmitter and receiver instead of multiple RS-232 transmitters, reducing costs and improving economic efficiency. There is an effect of preventing the breakage.

Claims (1)

A plurality of boards having a TTL; A selection switch unit configured to output a selection reference signal for selecting signals of the TTL; A multiplexer which selects signals of TTL less than the number of boards by the selection reference signal and mutually inputs / outputs the TTL; An isolation unit which inputs / outputs the multiplexer and electrically isolates input signals from the outside; A transceiver for inputting / outputting the isolation unit and converting input signals into a predetermined voltage; Module of the transceiver, characterized in that it comprises a plurality of terminals that input / output mutually with the transceiver.