Come crimpare il cavo ethernet. Guida per realizzare un cavo ethernet fai da te.

Summary

In this video, viewers learn how to create a DIY Ethernet cable, including the differences between cable categories and how to arrange the color-coded wires correctly. The tutorial explains the 'twisted pair' structure and the importance of shielding to reduce electromagnetic interference. It covers both direct and crossover cable configurations, depending on the devices being connected. Additionally, the video demonstrates how to terminate the cable using an RJ45 connector and test it for proper functionality. The step-by-step guide ensures that users can confidently build Ethernet cables tailored to their needs, all while avoiding excess cable length.

Takeaways

• 😀 Ethernet cables contain 8 color-coded wires arranged in 4 twisted pairs to reduce electromagnetic interference.
• 😀 The higher the category of the Ethernet cable, the better its performance and speed.
• 😀 The most common Ethernet connectors are RJ45, although they are more accurately called 8P8C modular connectors.
• 😀 There are two main wiring standards for Ethernet cables: T568A and T568B, both used depending on the type of connection.
• 😀 A direct cable connection uses the same wiring standard at both ends (either T568A or T568B).
• 😀 A crossover cable uses different wiring standards at each end (T568A on one end, T568B on the other) for connecting similar devices like two PCs.
• 😀 The order of the wires in the connector must follow specific patterns depending on the wiring standard used.
• 😀 The wires must be trimmed to the same length, just over a centimeter from the outer sheath, for proper connector insertion.
• 😀 A crimping tool is required to secure the wires in place inside the RJ45 connector and make the connection permanent.
• 😀 After crimping, a network tester can be used to verify the correct functioning of the Ethernet cable by checking the continuity of the connections.
• 😀 Once mastered, the DIY process allows you to create Ethernet cables of custom lengths, avoiding excess cable.

Q & A

What is the purpose of twisted pair cables in Ethernet cables?

Twisted pair cables are used to reduce electromagnetic interference between the pairs of wires. The two wires in each pair twist around each other to minimize the effects of external noise during data transmission.

What are the key differences between Ethernet cable categories?

Ethernet cables come in different categories, with higher-numbered categories providing better performance. For example, Cat5 supports speeds up to 1 Gbps over 100 meters, while higher categories like Cat5e can offer up to 40 Gbps with proper shielding.

Why are there different Ethernet cable categories like Cat5 and Cat5e?

Different Ethernet cable categories exist to offer various levels of performance. Cat5e is an improved version of Cat5, offering better speed and performance, with higher-frequency capabilities for more demanding network environments.

What is the RJ45 connector, and what is its significance?

The RJ45 connector is the standard connector used in Ethernet cables. It's also referred to as the 8P8C modular connector. Despite being commonly called RJ45, it is technically the 8P8C, indicating 8 positions and 8 contacts.

What is the difference between standard T568A and T568B wiring schemes?

T568A and T568B are two standards for wiring the individual colored wires inside an Ethernet cable. They determine the order in which the wires are placed inside the RJ45 connector. The two standards are interchangeable, but consistency must be maintained at both ends of the cable.

When should I use a crossover cable instead of a straight-through cable?

A crossover cable is used when connecting two devices of the same type, such as connecting two PCs or two routers directly. In contrast, a straight-through cable is used to connect devices of different types, like connecting a PC to a switch or router.

How do I prepare the wires before inserting them into the RJ45 connector?

Before inserting the wires into the RJ45 connector, you should straighten the colored wires and arrange them in the correct order according to the wiring standard (T568A or T568B). Then, cut the wires to the same length, ensuring they extend just beyond the outer insulation.

What tool is needed to attach the RJ45 connector to the Ethernet cable?

To attach the RJ45 connector, you need a crimping tool, specifically designed for Ethernet cables. This tool securely presses the pins of the connector into the wires, ensuring a solid connection and that the wires are held in place.

How can I test if my Ethernet cable is working correctly?

To test the cable, use a network cable tester. Insert the connectors into the tester, and if the cable is correctly crimped, the tester's LEDs should light up, indicating that the connections are properly made and the cable is functioning.

What are some advantages of making your own Ethernet cables?

Making your own Ethernet cables allows you to customize the length for specific projects, avoiding unnecessary excess cable. It also provides cost savings compared to buying pre-made cables, and gives you control over the quality and category of the cable you use.