CN116668382A - network switch - Google Patents

Abstract

A network switch uses LED combination to display status signals of multiple network connection interfaces. The network switch includes: a signal management unit, a control unit, multiple switch elements and multiple LEDs. The signal management unit receives status signals from the plurality of network connection interfaces and transmits data to the control unit to control each of the switching elements, and correspondingly outputs to control each of the LEDs. The status signals include: the first status data is output by the first control signal Action and non-action state, second state data and third state data are output by the second control signal to establish and disconnect connection and connection speed state, so that the LED corresponds to each of the first control signal and each of the second control signal Combining changes to display the status of different network connection interfaces.

Description

network switch

technical field

The invention relates to a network switch; in particular, it refers to a network switch which uses LEDs to display the state of the network connection interface.

Background technique

A known network switch has a plurality of network connection interfaces, a physical layer chip (PHY chip) and a plurality of LEDs, wherein the network connection interfaces are used for network cable connection. The physical layer chip is connected to the network connection interface to obtain the status of each network connection interface, and controls a corresponding LED according to the status of each network connection interface. Limited by the functional limitation of the physical layer chip, there are often combined displays that can only realize partial states. For example, the physical layer chip has only one control pin corresponding to each network connection interface to control one LED. Therefore, only part of the status of the network connection interface can be displayed, for example, the LED is always on to display the connection status (Link up), and the blinking LED is used to display the active status (Activating), and the third status cannot be displayed, such as the connection speed.

Therefore, the design of the existing network switches is still not perfect and needs to be improved.

Contents of the invention

In view of this, the object of the present invention is to provide a network switch, which can use a combination of multiple LEDs to display the status of the network connection interface.

In order to achieve the above purpose, a network switch provided by the present invention includes

A plurality of network connection interfaces, each of the network connection interfaces is used for a network connection; it is characterized in that the network switch also includes a plurality of display modules, and each of the display modules includes a plurality of LEDs, and each of the LEDs has a A first pole and a second pole; a plurality of control circuit modules, each of the control circuit modules includes a plurality of switching elements, each of the switching elements has a first end, a second end and a control end, the control terminal can be controlled so as to conduct or cut off between the first terminal and the second terminal; each of the first terminals is electrically connected to each of the second poles; each of the second terminals is electrically connected to a One end of the power supply; a signal management unit, electrically connected to the plurality of network connection interfaces, and receives a status signal from the plurality of network connection interfaces respectively, and the status signal includes a first status data and a second status data and at least one third state data; the signal management unit has a plurality of control pins and a first connection interface, wherein each of the control pins is electrically connected to the first of the plurality of LEDs of each of the display modules One pole; the signal management unit outputs a corresponding first control signal from a corresponding control pin according to the received first status data of each status signal; in addition, the signal management unit outputs a corresponding first control signal from the corresponding control pin; The first connection interface outputs the received second state data and third state data of each of the state signals; a control unit has a second connection interface and a control interface, and the second connection interface is electrically connected to the The first connection interface of the signal management unit, the control interface has a plurality of pin groups, each pin group has a plurality of pins, and the plurality of pins are respectively electrically connected to the switches of the control circuit modules The control terminal of the component; the control unit receives each of the second state data and each of the third state data through the second connection interface, and according to each of the second state data and each of the third state data Output a corresponding second control signal from each of the pin groups of the control port to the corresponding switching element of the control circuit module, so that the plurality of LEDs of each of the display modules correspond to each of the first The combination of the control signal and each of the second control signals changes the display mode.

The effect of the present invention is that the signal management unit and the control unit can jointly control the display of each LED, so that one control pin can be connected to multiple LEDs to display various states of the network connection interface.

Description of drawings

FIG. 1 is a block diagram of a network switch according to a first preferred embodiment of the present invention.

Fig. 2 is a partial circuit diagram of the network switch according to the first preferred embodiment of the present invention.

Fig. 3 is a control sequence diagram of the network switch according to the first preferred embodiment of the present invention.

Fig. 4 is a partial circuit diagram of a network switch according to a third preferred embodiment of the present invention.

Fig. 5 is a partial circuit diagram of a network switch according to a fourth preferred embodiment of the present invention.

Fig. 6 is a partial circuit diagram of a network switch according to a fifth preferred embodiment of the present invention.

FIG. 7 is a block diagram of a network switch according to a sixth preferred embodiment of the present invention.

FIG. 8 is a block diagram of a network switch according to a seventh preferred embodiment of the present invention.

Detailed ways

In order to illustrate the present invention more clearly, preferred embodiments are given and described in detail with accompanying drawings as follows. Please refer to FIG. 1 and FIG. 2, which is a network switch 1 according to the first preferred embodiment of the present invention. The network switch 1 includes a plurality of network connection interfaces 10, a plurality of display modules 50, a plurality of control circuit modules 40, a The signal management unit 20 and a control unit 30 .

Each network connection interface 10 can be inserted into a network cable (not shown in the figure), and connected to a device (not shown in the figure) through the network cable to receive a status signal from the device. Each network connection interface 10 can be, for example, Ethernet connection interface or fiber optic network connection interface. The state signal includes a first state data, a second state data and at least one third state data. In this embodiment, the first state data is an active state (Activing) or a non-active state, and the second state data is a connection establishment state (Link up) or a disconnection state (Link down) , and the third state data is one of a plurality of connection speeds, and the plurality of connection speeds include a first connection speed, a second connection speed and a third connection speed. In addition to the third status data indicating the connection speed, the third status data can also be the third status data indicating the transmission status or the reception status. The third state data does not exclude other states. The aforementioned first to third state data are just examples, and are not intended to limit the present invention.

Each display module 50 corresponds to a network connection interface 10 and is used to display the status of the corresponding network connection interface 10 . Each of the plurality of display modules 50 includes a plurality of LEDs 51, and each of the LEDs 51 has a first pole and a second pole. In this embodiment, the number of LEDs 51 is three as an example, but it is not taken as an example. limit, also can be two or more than four, the color of LED 51 is not identical. The first electrode of the LED 51 is a cathode, and the second electrode is an anode.

Each control circuit module 40 corresponds to a display module 50 and a network connection interface 10 for controlling the LED 51 of the corresponding display module 50 . Each of the plurality of control circuit modules 40 includes a plurality of switching elements 41, each of the switching elements 41 has a first terminal, a second terminal and a control terminal, and the control terminal can be controlled so that the first The connection between the end and the second end is conducted or cut off. The first end is electrically connected to the second pole of each LED 51 , and the second end is connected to one end of a power supply. In this embodiment, three switching elements 41 are taken as an example and are MOSFETs, but it is not limited thereto, and may also be one or more than four, the first end of which is a drain (Drain), and the second end is a source Pole (Source), the control terminal is the gate (Gate). The second terminal is connected to a positive terminal Vcc of the power supply. On each circuit path from the control pin to the positive terminal Vcc of the power supply, a current limiting resistor (not shown) can also be optionally connected in series.

In this embodiment, the signal management unit 20 has a physical layer chip 22 (Physical Layer, PHYchip), the physical layer chip 22 is electrically connected with the plurality of network connection interfaces 10, The network connection interface 10 receives the plurality of status signals. The physical layer chip 22 has a first connection interface 222 and a plurality of control pins 224, and the first connection interface 222 is electrically connected to the control unit 30 through a serial management interface (Serial Management Interface, SMI bus). Sexual connection and communication with the control unit 30. Each of the control pins 224 is electrically connected to the first electrodes of the plurality of LEDs 51 of each of the display modules 50 .

When the physical layer chip 222 receives the state signal from each of the network connection interfaces 10, the physical layer chip 222 outputs a corresponding first state signal from the corresponding control pin 224 according to the received first state data. and outputting the received second state data and the third state data from the first connection interface 222 to the control unit 30 . The first control signal output by each of the control pins 224 includes one of a first mode signal and a second mode signal, wherein the first mode signal is one of high potential and low potential, and in this implementation For example, since the control pin is connected to the cathode of the LED 51, the first mode signal is low. The second mode signal is continuously switched between high potential and low potential.

The control unit 30 can be, for example, a central processing unit, which has a second connection interface 32 and a control interface 34, and the control interface 34 can be, for example, a general-purpose input/output (GPIO). In practice, In addition, the control unit 30 may also be composed of a central processing unit and a GPIO expansion chip. The second connection interface 32 is electrically connected to the first connection interface 222 of the signal management unit 20 to receive the second status data and the third status data corresponding to each of the network connection interfaces 10 . The control interface 34 has a plurality of pin groups 342 , and each pin group 342 is correspondingly connected to each control circuit module 40 . Each of the pin groups 342 has a plurality of pins 342a. In this embodiment, three pins 342a are taken as an example, but it is not limited thereto, and there may be two or more than four pins. The plurality of pins 342a are respectively electrically connected to the control terminals of the plurality of switching elements 41 of each of the control circuit modules 40, in other words, each pin 342a of the control interface 34 can respectively control a switching element 41 to conduct or due. The control unit 30 outputs a corresponding second control signal from a corresponding pin group 342 of the control port 34 according to the received second status data and third status data. The second control signal output by the pin group 342 includes one of a third mode signal and a fourth mode signal, and the third mode signal is that one or more of the pins 342a of the pin group 342 are at low potential , so as to turn off the switching element receiving the low potential; the fourth mode signal is that one or more of the pins 342 a of the pin group 342 is at a high potential, so as to turn on the switching element 41 receiving the high potential.

Referring to FIG. 3, an example is given to illustrate the control mode of the LED 51 corresponding to one of the network connection interfaces 10. For the convenience of explanation, in FIG. Three pins 342a of pin group 342 are shown. When the network connection interface 10 is disconnected, that is, the network connection interface 10 is currently in the state where the network cable is not connected to the device. The first control signal output by the signal management unit 20 is a first mode signal, that is, the control pin 224 is at a low potential (Lo). And the signal management unit 20 outputs the second state data as the disconnected state to the control unit 30. When the control unit 30 judges that the second state data is the disconnected state, the second state data output from the corresponding pin group 342 The control signal is the third mode signal, that is, pin 1 to pin 3 are all low potentials (Lo), so that the corresponding switching elements 41 are all turned off, and LED 1 to LED 3 are all turned off (off), to show that the network The connection interface 10 is disconnected. In practice, when the network connection interface 10 is disconnected, the signal management unit 20 can also make the control pin 224 into a high impedance state, and the signal management unit 20 can also not output the second state data to the control The unit 30, the control unit 30 makes the pin 342a of the pin group 342 into a high impedance state, and makes the corresponding switch elements 41 all be turned off.

When the network connection interface 10 is in the state of establishing a connection, inactive, and the connection speed is the first connection speed, the state signal received by the signal management unit 20 is that the first state data is in an inactive state, and the second state data is in an established state. The connection state, the third state data is the first connection speed. When the signal management unit 20 judges that the first state data is a non-action state, the first control signal output from the control pin 224 is the first mode signal, that is, the control pin 224 is low potential (Lo), and the The signal management unit 20 outputs the second state data and the third state data to the control unit 30, and the control unit 30 judges that the second state data is the established connection state, and when the third state data is the first connection speed, the pin group of the control unit 30 The second control signal output by 342 is a fourth mode signal, which turns on the corresponding one or more switching elements 41 . In this embodiment, it is defined that LED 1 is lit (on) corresponding to the first connection speed, LED 2 is lit (on) corresponding to the second connection speed, LED 3 is lit (on) corresponding to the third connection speed, therefore, the fourth The mode signal is that the pin 1 is at a high potential (Hi), so that the corresponding switching element 41 is turned on, and both the pins 2 and 3 are at a low potential (Lo), so that the corresponding switching element 41 is turned off. Let LED 1 light up (on), and LED 2 and LED 3 turn off (off), to show that the network connection interface is established, inactive, and at the first connection speed.

When the network connection interface 10 is in the state of establishing a connection, operating, and the connection speed is the first connection speed, the state signal received by the signal management unit 20 is: the first state data is the action state, and the second state data is the connection establishment state, the third state data is the first connection speed. When the signal management unit 20 judges that the first state data is an active state, the first control signal output from the control pin 224 is the second mode signal, that is, the control pin 224 is between high potential (Hi) and low potential ( Lo) continuous switching, and the signal management unit 20 outputs the second state data and the third state data to the control unit 30, and the control unit 30 judges that the second state data is a connection establishment state, and the third state data is when the first connection speed The second control signal output by the pin group 342 of the control unit 30 is a fourth mode signal, which turns on the corresponding one or more switch elements 41 . In this embodiment, the fourth mode signal is that the pin 1 is at a high potential (Hi), so that the corresponding switching element 41 is turned on, and both the pins 2 and 3 are at a low potential (Lo), so that the corresponding switching element 41 is turned on. due. Let LED 1 blink, and LED 2 and LED 3 turn off (off), to show that the network connection interface 10 is establishing a connection, acting, and at the first connection speed.

Table 1 below summarizes various status data of a network connection interface 10 of this embodiment, the first control signal of the control pin 224 , the second control signal of the pin group 342 , and the display status of each LED 51 .

Table I

first state data second state data third state data control pin Pin 1 Pin 2 Pin 3 LED 1 LED 2 LED 3 none disconnected state none Lo Lo Lo Lo off off off non-action state Establish connection state first connection speed Lo hi Lo Lo on off off non-action state Establish connection state Second connection speed Lo Lo hi Lo off on off non-action state Establish connection state third connection speed Lo Lo Lo hi off off on action state Establish connection state first connection speed Hi/Lo hi Lo Lo flashing off off action state Establish connection state Second connection speed Hi/Lo Lo hi Lo off flashing off action state Establish connection state third connection speed Hi/Lo Lo Lo hi off off flashing

(Lo: low potential, Hi: high potential, Hi/Lo: continuous switching between low potential and high potential; on: bright, off: off)

Thereby, the display mode of the LED 51 of the display module 50 can be changed by the combination of the first control signal and the second control signal corresponding to each network connection interface 10 .

In addition, the control unit 30 can also simultaneously output low potential from more than two pins 342a of the pin group 342 in conjunction with the third state data to form a third mode signal, so that more than two switching elements 41 are turned off, or automatically connected More than two pins 342a of the pin group 342 output high potentials to form a fourth mode signal to turn on more than two switching elements 41 . For example, referring to Table 2 below, when the control unit 30 judges that the second state data is a connection establishment state and the third state data is a fourth connection speed, the pin 1 and pin 2 of the pin group 342 output high Potential, so that LED 1 and LED 2 can be lit (on) or blink at the same time, and the two light colors emitted by LED 1 and LED 2 are mixed to form another light color, which represents the current state of the network connection interface 10 The connection speed is the fourth connection speed.

Table II

first state data second state data third state data control pin Pin 1 Pin 2 Pin 3 LED 1 LED 2 LED 3 non-action state Establish connection state 4th connection speed Lo hi hi Lo on on off action state Establish connection state 4th connection speed Lo hi hi Lo flashing flashing off

(Lo: low potential, Hi: high potential, Lo/Hi: continuous switching between low potential and high potential; on: bright, off: off)

In a second preferred embodiment of the present invention, the status signal of the network connection interface 10 may further include a fourth status data, and the fourth status data is one of the sending status and the receiving status. The signal management unit 20 also transmits the fourth state data to the control unit 30, and the control unit 30 outputs a second control signal according to the second state data to the fourth state data. For example, Table 3 shows various status data of a network connection interface 10 and the first control signal of the control pin 224, the second control signal of the pin group 342, and the LED 51 of the second preferred embodiment of the present invention. Display state. At least one of the LEDs 51 (take LED 3 as an example) can be used to indicate the transmission state, and to indicate the reception state when it is turned off. Combinations of LED 1 and LED 2 indicate the first to third connection speeds.

Table three

(Lo: low potential, Hi: high potential, Hi/Lo: continuous switching between low potential and high potential; on: bright, off: off)

In this way, the display mode of the LED 51 of the display module 50 can also be changed by the combination of the first control signal and the second control signal corresponding to each network connection interface 10 .

Figure 4 shows the network switch 3 of the third preferred embodiment, which has a structure substantially the same as that of the first embodiment, the difference is that the first pole of each LED 51 is an anode, the second pole is a cathode, and each switch element 41 The first terminal is the source and the second terminal is the drain. The second end of each switching element 41 is connected to the power supply end which is the ground end GND. When the physical layer chip 22 of the signal management unit 20 is in a non-active state, the first mode signal of the first control signal of the control pin 224 is a high potential.

Table 4 below summarizes various status data of a network connection interface 10 of this embodiment, the first control signal of the control pin 224 , the second control signal of the pin group 342 , and the display status of each LED 51 .

Table four

first state data second state data third state data control pin Pin 1 Pin 2 Pin 3 LED 1 LED 2 LED 3 none disconnected state none Lo Lo Lo Lo off off off non-action state Establish connection state first connection speed hi hi Lo Lo on off off non-action state Establish connection state Second connection speed hi Lo hi Lo off on off non-action state Establish connection state third connection speed hi Lo Lo hi off off on action state Establish connection state first connection speed Hi/Lo hi Lo Lo flashing off off action state Establish connection state Second connection speed Hi/Lo Lo hi Lo off flashing off action state Establish connection state third connection speed Hi/Lo Lo Lo hi off off flashing

(Lo: low potential, Hi: high potential, Hi/Lo: continuous switching between low potential and high potential; on: bright, off: off)

The circuit architecture of this embodiment is also applicable to the second embodiment.

Fig. 5 shows the network switch 4 of the fourth preferred embodiment of the present invention, which is based on the first preferred embodiment, and further includes a plurality of inverters 60, and each of the inverters 60 is electrically connected to the signal Each of the control pins 224 of the physical layer chip 22 of the management unit 20 is connected to the first pole of the LED 51 of each of the display modules 50 . The inverter 60 is used to convert the high potential i to a low potential or convert the low potential to a high potential. Therefore, in this embodiment, when the first state data of the physical layer chip 22 of the signal management unit 20 is in an inactive state, the control The first mode signal of the first control signal of the pin 224 is a high potential. When the network connection interface 10 is disconnected, the control pin 224 can be in a high impedance state or a high potential.

The circuit architecture of this embodiment is also applicable to the second embodiment.

Fig. 6 shows the network switch 5 of the fifth preferred embodiment of the present invention, which is based on the third preferred embodiment, and includes a plurality of inverters 60, and each of the inverters 60 is electrically connected to the signal Each of the control pins 224 of the management unit 20 is connected to the first pole of the LED 51 of the display module 50 . When the physical layer chip 22 of the signal management unit 20 is in a non-active state, the first mode signal of the first control signal of the control pin 224 is a low potential. When the network connection interface 10 is disconnected, the control pin 224 can be in a high impedance state or a high potential.

The circuit architecture of this embodiment is also applicable to the second embodiment.

Fig. 7 shows the network switch 6 of the sixth preferred embodiment, which has roughly the same structure as the first preferred embodiment, the difference is that the signal management unit 20 includes a physical layer chip 22 electrically connected to a network A media layer chip 24 (Media Access Control, MAC chip), wherein the physical layer chip 22 is electrically connected to the plurality of network connection interfaces 10 to receive status signals, and the physical layer chip 22 is based on the received first status Data, output the corresponding first control signal from the corresponding control pin 224, and transmit the second state data and the third state data to the network media layer chip 24, and the network media layer chip 24 has a first connection The interface 242 , the first connection interface 242 is electrically connected with the control unit 30 . The network media layer chip 24 transmits the second state data and the third state data to the control unit 30 .

Fig. 8 is the network switch 7 of the seventh preferred embodiment, which has substantially the same structure as the sixth preferred embodiment, the difference is that the network media layer chip 24 has a plurality of control pins 244, and the plurality of control pins The pin 244 is electrically connected to the first poles of the plurality of LEDs 51 of each of the display modules 50; the physical layer chip 22 transmits according to the received first state data, second state data, and third state data. to the network media layer chip 24, and the network media layer chip 24 outputs corresponding first control signals from the corresponding plurality of control pins 244, and the first connection interface 242 transmits the second state data, The third state data is sent to the control unit 30 .

The architecture of the sixth and seventh embodiments can also be applied to the second to fifth embodiments.

According to the above, the network switch of the present invention generates a first control signal and a second control signal respectively by corresponding to the status signals of each network connection interface 10, and the display module 50 is changed by the combination of the first control signal and the second control signal. The display mode of the LED 51 effectively expands and displays the status of each network connection interface 10, achieving the purpose that one control pin 224 can be connected to multiple LEDs 51 to display various states of the network connection interface 10.

The above descriptions are only preferred feasible embodiments of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

Explanation of reference signs

[this invention]

1,3,4,5,6,7: network switches

10: Network connection interface

20: Signal management unit

22: Physical layer chip

222: the first connection interface

224: Control pin

24: Network media layer chip

242: the first connection interface

244: Control pin

30: Control unit

32: Second connection interface

34: Control interface

342: Pin group

342a: pin

40: Control circuit module

41: Switching element

50: display module

51: LED

60: reverser

Vcc: positive terminal

GND: ground terminal

Claims (9)

1. A network switch, comprising a plurality of network connection interfaces, each of the network connection interfaces is used for a network connection; it is characterized in that: the network switch also includes: a plurality of display modules, each of which includes a plurality of LEDs, each of which has a first pole and a second pole; A plurality of control circuit modules, each of the control circuit modules includes a plurality of switch elements, each of the switch elements has a first end, a second end and a control end, and the control end can be controlled so that the first Conducting or cutting off between one end and the second end; each of the first ends is electrically connected to each of the second poles; each of the second ends is electrically connected to one end of a power supply; A signal management unit, electrically connected to the plurality of network connection interfaces, and respectively receives a status signal from the plurality of network connection interfaces, and the status signal includes a first status data, a second status data and at least one The third state data; the signal management unit has a plurality of control pins and a first connection interface, wherein each of the control pins is electrically connected to the first poles of the plurality of LEDs of each of the display modules; The signal management unit outputs a corresponding first control signal from a corresponding control pin according to the received first state data of each state signal; in addition, the signal management unit outputs a corresponding first control signal from the first connection The interface outputs the received second state data and third state data of each of the state signals; A control unit has a second connection interface and a control interface, the second connection interface is electrically connected to the first connection interface of the signal management unit, the control interface has a plurality of pin groups, each pin The set has a plurality of pins, and the plurality of pins are respectively electrically connected to the control terminals of the switching elements of the control circuit modules; the control unit receives the second state data and the second status data through the second connection interface. Each of the third state data, and according to each of the second state data and each of the third state data, output a corresponding second control signal from each of the pin groups of the control port to the corresponding The switching element of the control circuit module is used to make the plurality of LEDs of each display module change the display mode corresponding to the combination of each of the first control signals and each of the second control signals. 2. The network switch according to claim 1, wherein the status signal further includes a fourth status data; the control unit receives each of the fourth status data through the second connection interface, and according to each of the fourth status data The second state data, each of the third state data and each of the fourth state data output corresponding second control signals from each of the pin groups of the control port to the corresponding plurality of the control circuit modules one of the switching elements. 3. The network switch according to claim 1, wherein the colors of the plurality of LEDs of each of the display modules are different; each of the second control signals output by the control unit controls the corresponding LEDs respectively. Turning on or off of the plurality of switching elements of the control circuit module is used to turn on or turn off one or more of the plurality of LEDs of each display module. 4. The network switch according to claim 3, wherein each of the third state data is one of a plurality of connection speeds, and the control unit corresponds to each of the connection speeds of each of the third state data, respectively controlling the turn-on or cut-off of the plurality of switching elements of the corresponding control circuit modules, so that when the third state data is connected at different speeds, the plurality of LEDs of each display module are connected at different speeds. displayed in a manner. 5. The network switch according to claim 1, wherein each of the first control signals output by the control pin of the signal management unit includes one of a first mode signal and a second mode signal, wherein the The first mode signal is one of a high potential and a low potential, and the second mode signal is continuously switched between the high potential and the low potential; each of the pins of the control port of the control unit The second control signal output by the group includes one of a third mode signal and a fourth mode signal, the third mode signal is that one or more of the pins of the pin group are at a low potential, and the first The quad mode signal is a high level for one or more of the pins of the pin group. 6. The network switch according to claim 5, wherein each of the first state data is one of an active state and a non-active state, when the signal management unit judges that each of the first state data is the In the action state, each of the first control signals output is the second mode signal; when the signal management unit judges that each of the first state data is the non-action state, each of the output The first control signal is the first mode signal; wherein, each of the second state data is one of a disconnection state and a connection establishment state; when the control unit judges that each of the second state data When in the disconnected state, each of the second control signals output by each of the pin groups of the control unit is the third mode signal, so that the corresponding switching element is turned off; when the control unit When it is judged that each of the second state data is the connection establishment state, each of the second control signals output by each of the pin groups of the control unit is the fourth mode signal, so that the corresponding one or A plurality of the switching elements are turned on. 7. The network switch according to claim 1, further comprising a plurality of inverters, and each of the control pins is electrically connected to the first pole of the LED of each of the display modules through each of the inverters ; Each of the inverters is used to convert a high potential in each of the first control signals to a low potential or convert a low potential in each of the first control signals to a high potential. 8. The network switch as claimed in claim 1, wherein the signal management unit comprises a physical layer chip, the physical layer chip has the plurality of control pins and the first connection interface. 9. The network switch according to claim 1, wherein the signal management unit comprises a physical layer chip and a network media layer chip electrically connected, wherein the physical layer chip is electrically connected to the plurality of networks Connect the interface, and receive each of the status signals from each of the network connection interfaces, and output the corresponding first control pin from a corresponding control pin according to the received first status data of each of the status signals signal, and transmit the second state data and the third state data of each state signal to the network media layer chip; the network media layer chip has the first connection interface, and the received The second state data and the third state data of each of the state signals are sent to the control unit.