Ethernet connectors history.

     

 Ethernet was developed in 1973 by Bob Metcalfe at the Xerox Palo Alto Research Xerox Palo Alto Research Center and supported by thick copper coaxial-type cables. The first version, 10BASE5, featured extremely stiff cable nearly a half-inch in diameter, and was later joined by 10BASE2, using cable about half as thick and much more flexible.

Ethernet connectors are used to establish a wired connection between devices in a Local Area Network (LAN). Here is some information about Ethernet connectors:

1. 1.RJ45 Connector:

   • Description: The most common type of Ethernet connector is the Registered Jack 45 (RJ45). It looks similar to a standard telephone connector (RJ11), but it is larger in size.
   • Usage: RJ45 connectors are used for Ethernet networking in homes and offices. They are widely used for both Ethernet cables and modular connectors.

2. 2.Ethernet Cables:

   • Types: There are different types of Ethernet cables, such as Cat5e, Cat6, Cat6a, and Cat7, each with varying data transfer capabilities.
   • Wiring Standards: Ethernet cables use two wiring standards: T568A and T568B. It's important to ensure that both ends of a cable use the same standard for proper connectivity.

3. 3.Crimping:

   • Process: Ethernet cables are often created by attaching connectors to the ends of the cables through a process called crimping. This involves placing the individual wires in the correct order and securing them within the connector.

4. 4.Color Coding:

   • TIA/EIA Standards: The TIA/EIA-568 standards define the color-coding schemes for the wires inside Ethernet cables. This ensures consistency and compatibility between different network installations.

5. 5.Shielded vs. Unshielded:

   • Shielded (STP): Some Ethernet cables have shielding to protect against electromagnetic interference (EMI). These are known as Shielded Twisted Pair (STP) cables.
   • Unshielded (UTP): Most common Ethernet cables are Unshielded Twisted Pair (UTP), which is suitable for many applications.

6. 6.Ethernet Ports:

   • Integrated Ports: Many devices, such as computers and routers, have integrated Ethernet ports where an Ethernet cable can be directly connected.
   • Adapters: In some cases, adapters or dongles may be used to convert other port types (e.g., USB or Thunderbolt) to Ethernet.

7. 7.Connector Compatibility:

   • Backward Compatibility: Newer Ethernet standards are usually backward compatible with older standards. For example, a device with a Gigabit Ethernet port can generally work with a Fast Ethernet (100 Mbps) or Ethernet (10 Mbps) connection.

8. 8Power over Ethernet (PoE):

   • Capability: Some Ethernet connectors support Power over Ethernet, allowing devices like IP cameras and VoIP phones to receive power and data over the same Ethernet cable.

      

                

It's important to note that while RJ45 is the most common connector for Ethernet, there are other connectors used in specific contexts, such as the smaller RJ-11 connector for telephone lines or the larger RJ-48 used in T1 lines.