One-to-two network cable tester and its testing method

Abstract

The present invention provides a one-to-two network cable tester and its testing method. The method includes a control unit, a main RJ45 module, and two sub-RJ45 modules. The 8 pins of the main RJ45 module are respectively connected to multiple first test terminals of the control unit. The 8 pins of the first sub-RJ45 module are respectively connected to multiple second test terminals of the control unit. The 1, 2, 3, and 6 pins of the second sub-RJ45 module are respectively and correspondingly connected to the 4, 5, 7, and 8 pins of the first sub-RJ45 module. A first self-resetting button is connected to the P3.0 pin of the control unit, and a second self-resetting button is connected to the P3.1 pin of the control unit. The present invention is easy to mass-produce, simple and applicable, and has both the testing function of a conventional network cable and the testing function of a one-to-two network cable.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution networks, and particularly to a one-to-two network cable tester and a testing method using the tester. Background Art

[0002] Conventional network cables are crimped according to the standard TIA / EIA568A and TIA / EIA 568B wiring sequences, and each end of the network cable has only one RJ45 connector. The testers on the market are developed for this kind of requirement, and there is no suitable testing instrument for one-to-two network cables.

[0003] With the rising of labor and material costs, it is a general trend in various industries to reduce product costs. With the optimization of the hardware structure design, one-to-two network cables may be adopted in more and wider fields, and the market will need corresponding fast and convenient testing instruments for detection.

[0004] Therefore, how to provide a one-to-two network cable testing device and how to use the device for testing exactly meet this need. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a one-to-two network cable tester and its method. The tester and method can solve the problem that there is a lack of a one-to-two network cable testing instrument that can quickly and conveniently detect in the prior art. The tester is easy to mass-produce, simple and applicable, and at the same time has the testing functions of conventional network cables and one-to-two network cables.

[0006] To solve the above problems, the technical solutions adopted by the present invention are as follows:

[0007] The one-to-two network cable tester includes: a control unit, a main RJ45 module, and two sub-RJ45 modules. The 8 pins of the main RJ45 module are respectively connected to multiple first test ends of the control unit. The 8 pins of the first sub-RJ45 module are respectively connected to multiple second test ends of the control unit. The 1, 2, 3, and 6 pins of the second sub-RJ45 module are respectively connected to the 4, 5, 7, and 8 pins of the first sub-RJ45 module in one-to-one correspondence;

[0008] Wherein, a first self-resetting button is connected to the P3.0 pin of the control unit, and a second self-resetting button is connected to the P3.1 pin of the control unit.

[0009] A further solution is that a light-emitting diode is connected between the 8 pins of the first sub-RJ45 module and multiple first test ends of the control unit.

[0010] A further solution is that the multiple first test terminals of the control unit are respectively the P1.0 pin, P1.1 pin, P1.2 pin, P1.3 pin, P1.4 pin, P1.5 pin, P1.6 pin, and P1.7 pin, and the multiple second test terminals of the control unit are respectively the P0.0 pin, P0.1 pin, P0.2 pin, P0.3 pin, P0.4 pin, P0.5 pin, P0.6 pin, and P0.7 pin.

[0011] A further solution is that a diode D1 is connected between the 1 pin of the first sub - RJ45 module and the P0.0 pin of the control unit, a diode D2 is connected between the 2 pin of the first sub - RJ45 module and the P0.1 pin of the control unit, a diode D3 is connected between the 3 pin of the first sub - RJ45 module and the P0.2 pin of the control unit, a diode D4 is connected between the 4 pin of the first sub - RJ45 module and the P0.3 pin of the control unit, a diode D5 is connected between the 5 pin of the first sub - RJ45 module and the P0.4 pin of the control unit, a diode D6 is connected between the 6 pin of the first sub - RJ45 module and the P0.5 pin of the control unit, a diode D7 is connected between the 7 pin of the first sub - RJ45 module and the P0.6 pin of the control unit, and a diode D8 is connected between the 8 pin of the first sub - RJ45 module and the P0.7 pin of the control unit.

[0012] A further solution is that the 1 pin of the second sub - RJ45 module is connected after the 4 pin of the first sub - RJ45 module and is connected to the diode D4, the 2 pin of the second sub - RJ45 module is connected after the 5 pin of the first sub - RJ45 module and is connected to the diode D5, the 3 pin of the second sub - RJ45 module is connected after the 7 pin of the first sub - RJ45 module and is connected to the diode D7, and the 6 pin of the second sub - RJ45 module is connected after the 8 pin of the first sub - RJ45 module and is connected to the diode D8.

[0013] A test method for a one - to - two network cable tester, which is applied to the above - mentioned one - to - two network cable tester for testing one - to - two network cables. The method includes the following steps: providing a main RJ45 module and two sub - RJ45 modules, connecting the 8 pins of the main RJ45 module to the 8 first test terminals of the control unit respectively in one - to - one correspondence, connecting the 8 pins of the first sub - RJ45 module to the 8 second test terminals of the control unit respectively in one - to - one correspondence, and respectively providing 8 light - emitting diodes on each branch between the 8 pins of the first sub - RJ45 module and the control unit.

[0014] Connect the pins 1, 2, 3, and 6 of the second sub - RJ45 module to the pins 4, 5, 7, and 8 of the first sub - RJ45 module in one - to - one correspondence.

[0015] When the second self - reset button is pressed, the P3.1 pin of the control unit is triggered with a low - level signal. After the control unit detects the low - level signal triggered on the P3.1 pin, it enters the test mode of the one - to - two network cable. The first test terminal corresponding to the control unit outputs a high level, and the second test terminal corresponding to the control unit outputs a low level. The 8 light - emitting diodes are lit in sequence in a cycle, and then it can be confirmed whether there is an error in the network cable crimping sequence or poor contact crimping.

[0016] A further solution is that when the first self - reset button is pressed, the P3.0 pin of the control unit is triggered with a low - level signal. After the control unit detects the low - level signal triggered on the P3.0 pin, it starts to call the test program for the standard network cable. The P1.0 pin of the control unit outputs a high level, and the P0.0 pin outputs a low - level signal. At this time, the light - emitting diode D1 connected to the pin 1 of the first sub - RJ45 module is lit.

[0017] An even further solution is to call the delay program. The P1.1 pin of the control unit outputs a high level, and its P0.1 pin outputs a low level. At this time, the light - emitting diode D2 connected to the pin 2 of the first sub - RJ45 module is lit and remains on for a preset time.

[0018] The 8 light - emitting diodes are lit in sequence in a cycle, and then it can be confirmed whether there is an error in the network cable crimping sequence or poor contact crimping.

[0019] An even further solution is that when entering the test mode of the one - to - two network cable, the P1.3 pin of the control unit outputs a low level, and the P0.3 pin outputs a low - level signal. At this time, the light - emitting diode D4 connected to the pin 1 of the second sub - RJ45 module is lit.

[0020] An even further solution is that then, call the delay program. The P1.4 pin of the control unit outputs a high level, and its P0.4 pin outputs a low level. At this time, the light - emitting diode D5 connected to the pin 2 of the second sub - RJ45 module is lit and remains on for a preset time.

[0021] The 8 light - emitting diodes are lit in sequence in a cycle, and then it can be confirmed whether there is an error in the network cable crimping sequence or poor contact crimping.

[0022] Compared with the prior art, the present invention selects the test function through buttons. When the first self-resetting button is pressed, the single-chip microcomputer detects the low-level signal of the P3.1 pin and calls the test program for a conventional network cable, causing the indicator lights connected to the pins corresponding to the network cable to light up in turn; when the second self-resetting button is pressed, the single-chip microcomputer detects the low-level signal of the P3.2 pin and calls the test program for a one-to-two network cable, causing the indicator lights connected to the pins corresponding to the network cable to light up in turn. Thus, it can be seen that when the present invention is applied to the test of a one-to-two network cable, it not only meets the test requirements for a conventional network cable, but also adds the test function for a one-to-two network cable, making it more practical and meeting the actual needs of certain application fields. It has a wide range of uses in the feeder terminal (FTU) in the power distribution network industry.

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an embodiment of a one-to-two network cable tester of the present invention.

[0025] Figure 2 It is a schematic circuit diagram of an embodiment of a one-to-two network cable tester of the present invention.

[0026] Figure 3 It is a flowchart of an embodiment of the test method of a one-to-two network cable tester of the present invention. Specific Embodiments

[0027] Embodiment of a one-to-two network cable tester:

[0028] See Figure 1 And Figure 2 A one-to-two network cable tester provided by the present invention includes: a control unit, a main RJ45 module 1 (U11), and two sub-RJ45 modules. The 8 pins of the main RJ45 module 1 are respectively connected to multiple first test ends of the control unit. The 8 pins of the first sub-RJ45 module 2 (U21) are respectively connected to multiple second test ends of the control unit. The 1, 2, 3, and 6 pins of the second sub-RJ45 module 3 (U22) are respectively connected to the 4, 5, 7, and 8 pins of the first sub-RJ45 module 2 in one-to-one correspondence.

[0029] Among them, a first self-resetting button button-1 is connected to the P3.0 pin of the control unit, and a second self-resetting button button-2 is connected to the P3.1 pin of the control unit.

[0030] Among them, a light-emitting diode is connected between each of the 8 pins of the first sub-RJ45 module 2 and multiple first test ends of the control unit.

[0031] In this embodiment, the multiple first test terminals of the control unit are respectively the P1.0 pin, P1.1 pin, P1.2 pin, P1.3 pin, P1.4 pin, P1.5 pin, P1.6 pin, and P1.7 pin, and the multiple second test terminals of the control unit are respectively the P0.0 pin, P0.1 pin, P0.2 pin, P0.3 pin, P0.4 pin, P0.5 pin, P0.6 pin, and P0.7 pin.

[0032] In this embodiment, a diode D1 is connected between the 1 pin of the first sub - RJ45 module 2 and the P0.0 pin of the control unit, a diode D2 is connected between the 2 pin of the first sub - RJ45 module 2 and the P0.1 pin of the control unit, a diode D3 is connected between the 3 pin of the first sub - RJ45 module 2 and the P0.2 pin of the control unit, a diode D4 is connected between the 4 pin of the first sub - RJ45 module 2 and the P0.3 pin of the control unit, a diode D5 is connected between the 5 pin of the first sub - RJ45 module 2 and the P0.4 pin of the control unit, a diode D6 is connected between the 6 pin of the first sub - RJ45 module 2 and the P0.5 pin of the control unit, a diode D7 is connected between the 7 pin of the first sub - RJ45 module 2 and the P0.6 pin of the control unit, and a diode D8 is connected between the 8 pin of the first sub - RJ45 module 2 and the P0.7 pin of the control unit.

[0033] Further, the 1 pin of the second sub - RJ45 module 3 is connected after the 4 pin of the first sub - RJ45 module 2 and is connected to the diode D4, the 2 pin of the second sub - RJ45 module 3 is connected after the 5 pin of the first sub - RJ45 module 2 and is connected to the diode D5, the 3 pin of the second sub - RJ45 module 3 is connected after the 7 pin of the first sub - RJ45 module 2 and is connected to the diode D7, and the 6 pin of the second sub - RJ45 module 3 is connected after the 8 pin of the first sub - RJ45 module 2 and is connected to the diode D8.

[0034] Preferably, the control unit of this embodiment includes a control chip U1 and a peripheral circuit connected to the control chip U1, such as a crystal oscillator circuit. The control chip U1 is an 80C52. The 80C52 is a basic product in the MCS - 51 series of single - chip microcomputers of INTEL Corporation. It is a high - performance 8 - bit single - chip microcomputer manufactured using INTEL Corporation's reliable CHMOS process technology and belongs to the HCMOS product of the standard MCS - 51. It combines the high - speed and high - density technology of HMOS and the low - power consumption characteristics of CHMOS. It is based on the standard MCS - 51 single - chip microcomputer system structure and instruction system and belongs to the enhanced version of the 80C51 single - chip microcomputer, integrating more functions such as clock output and up - or - down counter.

[0035] Embodiment of the test method of a one-to-two network cable tester:

[0036] As Figure 3 shown, the test method of a one-to-two network cable tester, which is applied to the above-mentioned one-to-two network cable tester for testing a one-to-two network cable. As Figure 3 shown, the method includes the following steps:

[0037] Step S1: Provide a main RJ45 module 1 and two sub-RJ45 modules. Connect the 8 pins of the main RJ45 module 1 to the 8 first test ends of the control unit one by one. Connect the 8 pins of the first sub-RJ45 module 2 to the 8 second test ends of the control unit one by one. And respectively provide 8 light-emitting diodes on each branch between the 8 pins of the first sub-RJ45 module 2 and the control unit.

[0038] Step S2: Connect the 1, 2, 3, and 6 pins of the second sub-RJ45 module 3 to the 4, 5, 7, and 8 pins of the first sub-RJ45 module 2 one by one.

[0039] Step S3: When the second self-resetting button button-2 is pressed, the P3.1 pin of the control unit is triggered with a low-level signal. After the control unit detects the low-level signal triggered on the P3.1 pin, it enters the test mode of the one-to-two network cable.

[0040] Step S4: The control unit outputs a high level from the corresponding first test end, and outputs a low level from the corresponding second test end, and sequentially and cyclically lights up the 8 light-emitting diodes, so as to confirm whether there is an error in the network cable crimping sequence or poor contact crimping.

[0041] When the first self-resetting button button-1 is pressed, the P3.0 pin of the control unit is triggered with a low-level signal. After the control unit detects the low-level signal triggered on the P3.0 pin, it starts to call the test program for the standard network cable. The P1.0 pin of the control unit outputs a high level, and the P0.0 pin outputs a low-level signal. At this time, the light-emitting diode D1 connected to the 1 pin of the first sub-RJ45 module 2 is lit.

[0042] Then, call the delay program. The P1.1 pin of the control unit outputs a high level, and its P0.1 pin outputs a low level. At this time, the light-emitting diode D2 connected to the 2 pin of the first sub-RJ45 module 2 is lit and remains constantly lit within the preset time. Sequentially and cyclically light up the 8 light-emitting diodes, so as to confirm whether there is an error in the network cable crimping sequence or poor contact crimping.

[0043] When entering the test mode of the one-to-two network cable, the control unit outputs a low level from the P1.3 pin, and the P0.3 pin outputs a low-level signal. At this time, the light-emitting diode D4 connected to the 1 pin of the second RJ45 module 3 is lit.

[0044] Then, call the delay program. The control unit outputs a high level from the P1.4 pin, and its P0.4 pin outputs a low level. At this time, the light-emitting diode D5 connected to the 2 pin of the second RJ45 module 3 is lit and remains on for a preset time. Light up 8 light-emitting diodes in sequence to confirm whether there is an error in the network cable crimping sequence or poor contact of the joints.

[0045] Specifically, when testing a standard network cable: connect the 8 pins of the main RJ45 module 1 to the P1 port of the control unit in sequence, such as P1.0 - P1.7. At the other end, the first RJ45 module 2 first connects the anodes of 8 light-emitting diodes in pin order, and then connects the cathodes of the 8 light-emitting diodes to the P0 port in sequence, such as P0.0 - P0.7. Insert the network cable with regular crimping, press the first self-resetting button button-1 to start the single-chip microcomputer test program. When the program runs, the control unit outputs a high level from the P1.0 pin and a low level from the P0.0 pin, and calls a 0.5-second delay program to light up the first corresponding indicator light. Then, in this way, make the control unit output a high level from the P1.1 pin and a low level from the P0.1 pin, delay for 0.5 seconds, and light up the second indicator light. In the above way, the LED lights corresponding to the 8 wires of the regular network cable can be lit one by one in sequence. If there is any that does not light up or is not lit in sequence, it can be determined that the network cable is wrongly connected or has poor contact.

[0046] Specifically, when testing a one-to-two network cable: insert the RJ45 connectors of the 8 network cables crimped according to the standard TIA / EIA568A or TIA / EIA568B standard into a main RJ45 module 1 connected to the P1 port of the control unit. Insert the other two first-branch network cables into the first RJ45 module 2, and insert the second-branch network cables (corresponding to pins 1, 2, 3, 6 on splitter 2) connected to pins 4, 5, 7, 8 of the standard network cable connector into the second RJ45 module 3. By pressing the self-resetting button, call the test program of the one-to-two network cable to make 8 indicator lights light up one by one with a delay. If there is any that does not light up or is not lit in sequence, it can be determined that the network cable is wrongly connected or has poor contact.

[0047] In this embodiment, when a PC is connected to a HUB and the HUBs are connected to each other, a straight-through cable is usually used for the connection. The wire sequences of the two ends of the RJ45 are the same. Either both ends are in the TIA / EIA568A wire sequence or both ends are in the TIA / EIA568B wire sequence. That is, pin 1 of the RJ45 connectors at both ends of the network cable is connected to pin 1, pin 2 is connected to pin 2, and so on until pin 8 is connected to pin 8. To test whether there are crimping errors or poor contacts in the wire sequence connection of this network cable, it needs to be tested with a tester. At this time, two RJ45 sockets are required for the test.

[0048] One end of a network cable made according to the standard (taking the network cable made according to the TIA / EIA568B standard as an example) is inserted into the main RJ45 module 1, and the other end is inserted into the first sub-RJ45 module 2. By pressing the first self-resetting button button-1, the P3.0 pin of the control unit is triggered to output a low-level signal. When the control unit detects the low-level signal of the P3.0 pin, it starts to call the test program for the standard network cable. The P1.0 pin outputs a high level, and the P0.0 pin outputs a low-level signal. At this time, the LED light corresponding to pin 1 of the RJ45 module is lit. The program calls the delay program and delays for 0.5 seconds. Then the P1.1 pin outputs a high level, and the P0.1 pin outputs a low-level signal. At this time, the LED light corresponding to pin 2 of the RJ45 module is lit and remains lit for 0.5 seconds. And so on. The program can make the corresponding LED lights connected to pins 1-8 of the RJ45 light up one by one in sequence and can also achieve cyclic lighting in sequence. For a network cable with correct wire sequence crimping and normal contact, the 8 indicator lights will light up in sequence at this time. If the lights do not light up in sequence or do not light up, it can be judged that there are errors in the crimping wire sequence of the network cable or poor crimping of the contacts, that is, a defective network cable.

[0049] In practical applications, when testing a one-to-two network cable, three RJ45 connectors are required. In addition to the main RJ45 socket and the sub-RJ45 socket used for testing standard network cables, a second RJ45 socket needs to be added. The main RJ45 module 1 still plugs in an RJ45 connector according to the standard (taking the connector made according to the TIA / EIA568B standard as an example). The pins 1, 2, 3, and 6 of the main RJ45 module 1 of the first branch are connected to the pins 1, 2, 3, and 6 of the standard network cable in a one-to-one correspondence. The pins 1, 2, 3, and 6 of the first sub-RJ45 module 2 of the second branch are connected to the pins 4, 5, 7, and 8 of the standard RJ45 connector in a one-to-one correspondence. At this time, only the pins 1, 2, 3, and 6 of the second sub-RJ45 module 3 need to be connected to the leads of pins 4, 5, 7, and 8 of the first sub-RJ45 module 2. When the second self-resetting switch button-2 is pressed, a low-level signal is triggered at the P3.1 pin. When the single-chip microcomputer detects the low-level signal at the P3.1 pin, the software enters the test mode of the one-to-two network cable. As long as the corresponding pins of the single-chip microcomputer are controlled to output high and low levels, the 8 indicator lights can still be lit in sequence, achieving the same effect as testing an RJ45 crimped according to TIA / EIA568A or TIA / EIA568B, and sharing the corresponding 8 indicator lights.

[0050] Compared with the prior art, the present invention selects the test function through a button. When the first self-resetting button is pressed, the single-chip microcomputer detects the low-level signal at the P3.1 pin and calls the test program for a conventional network cable, causing the indicator lights connected to the pins corresponding to the network cable to light up in sequence. When the second self-resetting button is pressed, the single-chip microcomputer detects the low-level signal at the P3.2 pin and calls the test program for a one-to-two network cable, causing the indicator lights connected to the pins corresponding to the network cable to light up in sequence. Thus, it can be seen that when the present invention is applied to the test of a one-to-two network cable, it not only meets the test requirements of a conventional network cable but also adds the test function for a one-to-two network cable, making it more practical and meeting the actual needs of certain application fields. It has a wide range of uses in the feeder terminal unit (FTU) in the power distribution network industry.

[0051] The above embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. A testing method for a one-to-two network cable tester, characterized in that: The tester includes: a control unit, a main RJ45 module, and two sub-RJ45 modules. The 8 pins of the main RJ45 module are respectively connected to multiple first test terminals of the control unit. The 8 pins of the first sub-RJ45 module are respectively connected to multiple second test terminals of the control unit. The 1st, 2nd, 3rd, and 6th pins of the second sub-RJ45 module are respectively and correspondingly connected to the 4th, 5th, 7th, and 8th pins of the first sub-RJ45 module. Among them, a first self-resetting button is connected to the P3.0 pin of the control unit, and a second self-resetting button is connected to the P3.1 pin of the control unit; The test method includes the following steps: Provide a main RJ45 module and two sub-RJ45 modules. Connect the 8 pins of the main RJ45 module respectively and correspondingly to 8 first test terminals of the control unit. Connect the 8 pins of the first sub-RJ45 module respectively and correspondingly to 8 second test terminals of the control unit, and respectively provide 8 light-emitting diodes on each branch between the 8 pins of the first sub-RJ45 module and the control unit; Connect the 1st, 2nd, 3rd, and 6th pins of the second sub-RJ45 module respectively and correspondingly to the 4th, 5th, 7th, and 8th pins of the first sub-RJ45 module; When the second self-resetting button is pressed, the P3.1 pin of the control unit is triggered with a low-level signal. After the control unit detects that the P3.1 pin is triggered with a low-level signal, it enters the test mode of a one-to-two network cable. The control unit outputs a high level from the corresponding first test terminal, and outputs a low level from the corresponding second test terminal, and sequentially and cyclically lights up 8 light-emitting diodes, so as to confirm whether there is an error in the network cable pressing wire sequence or poor contact of the joints; When the first self-resetting button is pressed, the P3.0 pin of the control unit is triggered with a low-level signal. After the control unit detects that the P3.0 pin is triggered with a low-level signal, it starts to call the test program for the standard network cable. The P1.0 pin of the control unit outputs a high level, and the P0.0 pin outputs a low-level signal. At this time, the light-emitting diode D1 connected to the 1st pin of the first sub-RJ45 module is lit.

2. The method according to claim 1, characterized in that: A light-emitting diode is connected between each of the 8 pins of the first sub-RJ45 module and the multiple first test terminals of the control unit.

3. The method according to claim 2, characterized in that: The multiple first test terminals of the control unit are respectively the P1.0 pin, P1.1 pin, P1.2 pin, P1.3 pin, P1.4 pin, P1.5 pin, P1.6 pin, and P1.7 pin. The multiple second test terminals of the control unit are respectively the P0.0 pin, P0.1 pin, P0.2 pin, P0.3 pin, P0.4 pin, P0.5 pin, P0.6 pin, and P0.7 pin.

4. The method according to claim 3, characterized in that: A diode D1 is connected between the 1-pin of the first sub-RJ45 module and the P0.0 pin of the control unit. A diode D2 is connected between the 2-pin of the first sub-RJ45 module and the P0.1 pin of the control unit. A diode D3 is connected between the 3-pin of the first sub-RJ45 module and the P0.2 pin of the control unit. A diode D4 is connected between the 4-pin of the first sub-RJ45 module and the P0.3 pin of the control unit. A diode D5 is connected between the 5-pin of the first sub-RJ45 module and the P0.4 pin of the control unit. A diode D6 is connected between the 6-pin of the first sub-RJ45 module and the P0.5 pin of the control unit. A diode D7 is connected between the 7-pin of the first sub-RJ45 module and the P0.6 pin of the control unit. A diode D8 is connected between the 8-pin of the first sub-RJ45 module and the P0.7 pin of the control unit.

5. The method according to claim 4, characterized in that: The 1-pin of the second sub-RJ45 module is connected after the 4-pin of the first sub-RJ45 module and is connected to the diode D4. The 2-pin of the second sub-RJ45 module is connected after the 5-pin of the first sub-RJ45 module and is connected to the diode D5. The 3-pin of the second sub-RJ45 module is connected after the 7-pin of the first sub-RJ45 module and is connected to the diode D7. The 6-pin of the second sub-RJ45 module is connected after the 8-pin of the first sub-RJ45 module and is connected to the diode D8.

6. The method according to claim 1, characterized in that: Call the delay program. A high level is output from the P1.1 pin of the control unit, and a low level is output from its P0.1 pin. At this time, the light-emitting diode D2 connected to the 2-pin of the first sub-RJ45 module is lit and remains on for a preset time. Light up 8 light-emitting diodes in sequence to confirm whether there is an error in the network cable crimping sequence or poor contact of the joints.

7. The method according to claim 1, characterized in that: When entering the test mode of the one-to-two network cable, a low level is output from the P1.3 pin of the control unit, and a low-level signal is output from the P0.3 pin. At this time, the light-emitting diode D4 connected to the 1-pin of the second sub-RJ45 module is lit.

8. The method according to claim 7, characterized in that: Call the delay program. A high level is output from the P1.4 pin of the control unit, and a low level is output from its P0.4 pin. At this time, the light-emitting diode D5 connected to the 2-pin of the second sub-RJ45 module is lit and remains on for a preset time. Light up 8 light-emitting diodes in sequence to confirm whether there is an error in the network cable crimping sequence or poor contact of the joints.

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