Ethernet Pin
介紹:
Ethernet is a widely used technology for connecting devices in a local area network (LAN). It uses various pins, or connectors, to establish physical connections between devices. This article will provide a detailed explanation of different Ethernet pins and their functions.
Ethernet Connector Types:
1. RJ45 Connector:
– Pin 1: Transmit Data + (TD+)
– Pin 2: Transmit Data – (TD-)
– Pin 3: Receive Data + (RD+)
– Pin 4: Not used (N/C)
– Pin 5: Not used (N/C)
– Pin 6: Receive Data – (RD-)
– Pin 7: Not used (N/C)
– Pin 8: Not used (N/C)
2. RJ11 Connector:
– Pin 1: Tip of the line (positive pole)
– Pin 2: Ring of the line (negative pole)
– Pin 3: Not used (N/C)
– Pin 4: Not used (N/C)
– Pin 5: Not used (N/C)
– Pin 6: Not used (N/C)
3. BNC Connector:
– Pin: Center Conductor (signal)
– Shell: Shield/ground
4. M12 Connector:
– Pin 1: Reserved
– Pin 2: Data B
– Pin 3: Data A
– Pin 4: Shielding (ground)
Functions of Ethernet Pins:
1. Transmit Data + (TD+):
– Carries the positive signal of outgoing data from the sender device.
2. Transmit Data – (TD-):
– Carries the negative signal of outgoing data from the sender device.
3. Receive Data + (RD+):
– Carries the positive signal of incoming data to the receiver device.
4. Receive Data – (RD-):
– Carries the negative signal of incoming data to the receiver device.
5. Tip of the line:
– Positive pole of the signal in RJ11 connectors.
6. Ring of the line:
– Negative pole of the signal in RJ11 connectors.
7. Center Conductor:
– Carries the signal in BNC connectors.
8. Shell:
– Functions as the ground or shield for the signal in BNC connectors.
9. Data A and Data B:
– Used for transmitting data signals in M12 connectors.
結論:
Understanding the different Ethernet pins and their functions is crucial for proper network connectivity. Whether it’s the popular RJ45 or the less common BNC or M12 connectors, each pin plays a specific role in transmitting and receiving data. By familiarizing ourselves with these pins, we can ensure efficient and effective communication within our local area networks.
