Gigabit Ethernet

Gigabit Ethernet,which was standardized by the IEEE as the 802.3z standard, represents a merging of 8022.3 Ethernet and ANSI X3Tll fiber channel technology. Under the 802.3z umbrella the IEEE defined three standards for the operation of Gigabit Ethernet in June 1998, referred to as 1000BASE-SX,1000BASE-LX, and 1000BASE-CX, A year later the IEEE’s 802.3ab standard defined the operation of Gigabit Ethernet over unshielded twisted-pair CAT5, CAT5e, or CAT6 cabling, which became known as 1000GASE-T.

Fiber-Based Gigabit Ethernet

There are two laser standards for Gigabit Ethernet over fiber, 1000BASE-SX(short-wavelength laser) and 1000BASE-LX (long-wavelength laser).

1000BASE-SX operates over multi-mode fiber using an 850-nm laser, which enables a transmission distance between endpoints of 220 m over 62.5/125-nm fiber. However. the use of 50/125-nm fiber can reliably extend the transmission distance to 500 m. enabling its use as a building backbone.

1000BASE-LX

1000BASE-LX represents the long wave laser version of Gigabit Ethernet over fiber.this version of Gigabit Ethernet can operate over single-mode or mu lti-mode fiber.Single-mode fiber using a 9-μm core and a 1300-nm laser is specified to work over a distance of up to 2 km; however, most vendors support a transmission distance up to 10 to 20 km if their equipment is used at both ends of a connection. When used over multi-mode fiber, a maximum segment length of 550 m is possible.

1000BASE-ZX and LH

Although 1000BASE-ZX and 1000BASE-LH do not represent IEEE standards, they represent industry-accepted terms used to reference Extended Gigabit Ethernet transmission technologies.

1000BASE-ZX references the use of single-mode fiber and a long-wavelength laser (1550 nm) to obtain a span line of 70 km (43.4 mi), with the use of a premium single-mode fiber providing a link span up to 100 km(62 mi). Under 1000BASEZX a signaling rate of 1.25 Gbps is used to transmit and receive data using 8B/ 10B encoding.

1000BASE-LH, where "LH" stands for " long haul" represents a second non-standard but industry accepted version of Gigabit Ethernet. 1000BASE-LH uses a long wave laser (1310 nm) to support a maximum transmission distance of 550 m when multi-mode fiber is used and of 10 km when single-mode fiber is used.

Gigabit Ethernet Fiber SFP Transceiver Modules from Fiberstore

Cisco Transceiver Modules support Ethernet, Sonet/SDH and Fibre Channel applications across all Cisco switching and routing platforms. Cisco pluggable transceivers (Transceiver SX) offer a convenient and cost effective solution for the adoption in data centers, campuses, metropolitan area access and ring networks, and storage area networks.

There are five types of Cisco 1000BASE-X SFP Transceiver configurations:

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