400GBASELR8

400GBASELR8 is a high-speed Ethernet standard designed for data center and enterprise networks. It operates at a data rate of 400 gigabits per second (Gbps) over a single lane of fiber optic cable. The "LR" in the name stands for Long Range, indicating its capability to transmit data over long distances, up to 10 kilometers (km) on single-mode fiber and 100 meters (m) on multi-mode fiber. The "8" signifies that it uses 850 nanometer (nm) vertical cavity surface-emitting laser (VCSEL) technology for transmission, which is cost-effective and energy-efficient.

400GBASELR8 is part of the IEEE 802.3bs standard, which was approved in 2017. It is designed to meet the growing demand for high-bandwidth connectivity in data centers and enterprise networks. The standard supports full-duplex operation, allowing for simultaneous transmission and reception of data. It also includes features such as forward error correction (FEC) to improve data integrity and reduce the bit error rate (BER).

The 400GBASELR8 standard is backward compatible with 100GBASELR4, allowing for a smooth upgrade path for existing networks. It is also designed to work with existing fiber infrastructure, making it a cost-effective solution for upgrading to higher speeds. The standard is supported by a wide range of network equipment manufacturers, ensuring interoperability and widespread adoption.

In summary, 400GBASELR8 is a high-speed Ethernet standard that operates at 400 Gbps over a single lane of fiber optic cable. It is designed for long-range transmission, supports full-duplex operation, and includes features such as forward error correction. It is part of the IEEE 802.3bs standard and is backward compatible with 100GBASELR4, making it a cost-effective solution for upgrading to higher speeds in data centers and enterprise networks.