Ethernet Pin Outs
Введение:
Ethernet is a widely used technology for wired networks, allowing devices to connect and communicate with each other over a local area network (локальная сеть). In order for Ethernet devices to establish a connection, a specific pin-out configuration is required. This article will provide a detailed explanation of Ethernet pin-outs, highlighting the different levels of connection and their corresponding functions.
Ethernet Pin-Outs:
1. RJ45 Connector:
The RJ45 connector is the most commonly used connector for Ethernet connections. It has eight pins arranged in a row. The pin-out configuration for an RJ45 connector follows the T568B standard, which is widely adopted in most Ethernet installations. The pin-out arrangement is as follows:
Pin 1: Transmit (TX+) – Transmits data from the device to the network.
Pin 2: Transmit (TX-) – Transmits data from the device to the network.
Pin 3: Receive (RX+) – Receives data from the network.
Pin 4: Not connected – Typically left unused.
Pin 5: Not connected – Typically left unused.
Pin 6: Receive (RX-) – Receives data from the network.
Pin 7: Not connected – Typically left unused.
Pin 8: Not connected – Typically left unused.
2. Сетевой кабель:
To establish a physical connection between Ethernet devices, an Ethernet cable is used. These cables contain four pairs of twisted wires, each color-coded. The Ethernet pin-outs are configured within these twisted pairs. The pin-out arrangement for Ethernet cables is as follows:
Пара 1 (White/Orange, Апельсин):
Pin 1: Transmit (TX+)
Pin 2: Transmit (TX-)
Pin 3: Receive (RX+)
Pin 4: Not connected
Пара 2 (White/Green, Зеленый):
Pin 5: Not connected
Pin 6: Receive (RX-)
Pin 7: Not connected
Pin 8: Not connected
Пара 3 (White/Blue, Синий):
Pin configuration depends on the specific Ethernet standard used.
Пара 4 (White/Brown, Brown):
Pin configuration depends on the specific Ethernet standard used.
3. Стандарты Ethernet:
Ethernet standards define the pin-out configuration for specific types of Ethernet connections. Different standards have different pin-outs arrangement for pairs 3 и 4. The most common Ethernet standards are:
– 10БАЗА-Т: Uses only two pairs (1 и 2) for communication.
– 100БАЗА-TX: Uses two pairs (1 и 2) for communication and pairs 3 и 6 for signaling.
– 1000БАЗА-Т: Utilizes all four pairs (1, 2, 3, и 4) for communication.
Заключение:
Understanding Ethernet pin-outs is essential for setting up and troubleshooting Ethernet connections. The RJ45 connector and Ethernet cables play crucial roles in establishing the correct pin-out configurations. By following the appropriate pin-out standards and specifications, devices can communicate effectively over a wired Ethernet network.
