The process of construction of integrated wiring is a high-end stage of the fault of the wiring system, and the line sequence problem of the network “pass†and the “unable to pass†is relatively easy to occur in the twisted-pair wiring process. Faults caused by non-standard construction and construction mistakes are often unpredictable. Many users often appear in the wiring is a one-to-one error connection method, when the connection distance is short, the system will not appear on the connection failure. However, when the connection distance is long and the network is busy or running at a high speed, it is easy...
In fact, the core is to make the 3 and 6 pins the same twisted pair (linked by T568A or T568B standard). In Ethernet, two pairs of twisted pairs are generally used. They are arranged at positions 1, 2, 3, and 6. If you are not using two pairs of wires, but use the original pair of wires separately, a string will be formed. Crosstalk (SplitPair error refers to failure to install according to the correct line label during wire bonding, resulting in transmission performance failure), which has a significant impact on network performance. The 10M network environment is not obvious. If the traffic is large or the distance is long in a 100M network environment, the network cannot be connected. This fault is more common and easier to detect during the engineering audit process. After the RJ45 header is re-introduced, it can be restored to normal.
In the absence of testing tools, there may be some errors in the connection work. Common connection errors include incorrect cable labels, open connections, and short circuits. Open circuit and short circuit During construction, open circuit or short circuit faults may occur due to problems such as tools, wiring techniques, or lack of wall threading techniques. Reverse the same pair of wires at the opposite ends of the needle, such as 1-2 at one end and 2-1 at the other end. The wrong pair connects one pair of wires to the other pair of wires on the other end. For example, one end is 1-2 and the other end is connected to 4-5.
There is also a kind of fault condition that is string winding. The so-called string winding means that the original two pairs of lines are respectively disassembled and reconstituted into a new pair. Because end-to-end connectivity is not affected when this type of failure occurs, normal multimeters cannot detect the cause of the failure and can only be checked by using a dedicated cable tester.
Faults often occur during the laying of optical cables, such as signal attenuation caused by long cable lengths, excessive optical cable bending loss and pressure loss due to bending transitions, optical cable compression or breakage, poor cable fusion, connector contamination, and joint polishing. Bad, poor contact at joints, etc.
In fact, the core is to make the 3 and 6 pins the same twisted pair (linked by T568A or T568B standard). In Ethernet, two pairs of twisted pairs are generally used. They are arranged at positions 1, 2, 3, and 6. If you are not using two pairs of wires, but use the original pair of wires separately, a string will be formed. Crosstalk (SplitPair error refers to failure to install according to the correct line label during wire bonding, resulting in transmission performance failure), which has a significant impact on network performance. The 10M network environment is not obvious. If the traffic is large or the distance is long in a 100M network environment, the network cannot be connected. This fault is more common and easier to detect during the engineering audit process. After the RJ45 header is re-introduced, it can be restored to normal.
In the absence of testing tools, there may be some errors in the connection work. Common connection errors include incorrect cable labels, open connections, and short circuits. Open circuit and short circuit During construction, open circuit or short circuit faults may occur due to problems such as tools, wiring techniques, or lack of wall threading techniques. Reverse the same pair of wires at the opposite ends of the needle, such as 1-2 at one end and 2-1 at the other end. The wrong pair connects one pair of wires to the other pair of wires on the other end. For example, one end is 1-2 and the other end is connected to 4-5.
There is also a kind of fault condition that is string winding. The so-called string winding means that the original two pairs of lines are respectively disassembled and reconstituted into a new pair. Because end-to-end connectivity is not affected when this type of failure occurs, normal multimeters cannot detect the cause of the failure and can only be checked by using a dedicated cable tester.
Faults often occur during the laying of optical cables, such as signal attenuation caused by long cable lengths, excessive optical cable bending loss and pressure loss due to bending transitions, optical cable compression or breakage, poor cable fusion, connector contamination, and joint polishing. Bad, poor contact at joints, etc.
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