A type of standard for implementing Gigabit Ethernet networks. The CX in 1000BaseCX stands for short-haul copper, and it indicates that this version of Gigabit Ethernet is intended for short cable runs over copper cabling. Gigabit Ethernet standards are defined in the 802.3z standards of Project 802 developed by the IEEE. 1000BaseCX technologies are in the beginning stages of being widely implemented in enterprise-level networks and are primarily used for collapsed backbones and high-speed interconnects within wiring closets and equipment rooms.
Graphic 0-8. A 1000BaseCX network.
How It Works
1000BaseCX is an extension of standard Ethernet technologies to gigabit-level network speeds. 1000BaseCX is normally implemented using shielded twisted-pair (STP) cabling. Cable segments have a maximum length of only 25 meters. 1000BaseCX employs 8B/10B coding, with serial transmission rates of 1.25 Gbps. STP cabling is standard 150-ohm balanced cabling and should have a quality slightly better than IBM Type I cabling.
1000BaseCX is intended mainly for connecting high-speed hubs, Ethernet switches, and routers together in wiring closets. Common implementations for 1000BaseCX are in switch-switch and switch-server connections, with switch-server connections being the most frequently implemented use for 1000BaseCX.