1000BASEZX

1000BASEZX is a standard for Gigabit Ethernet over optical fiber. It is defined by the IEEE 802.3z standard and is designed for long-distance communication. The "1000" indicates a transmission speed of 1000 megabits per second, "BASE" signifies baseband signaling, and "ZX" denotes its suitability for extended reach applications using specific types of optical fiber.

This standard typically utilizes single-mode fiber optics, which are capable of transmitting light signals over much greater distances than multimode fiber. 1000BASEZX is designed to achieve distances of up to 80 kilometers (approximately 50 miles) without the need for repeaters or optical amplifiers. This extended reach is achieved through the use of specific laser types and optical components optimized for long-haul transmission.

The primary application for 1000BASEZX is in metropolitan area networks (MANs) and wide area networks (WANs), connecting disparate locations or extending backbone networks. It is often used for inter-building connections or between different points of presence within a city. While it offers significant reach, the cost of single-mode fiber and associated equipment can be higher than for shorter-reach Ethernet standards. Compatibility with existing network infrastructure is a key consideration when deploying 1000BASEZX.