Appendix A: About Gigabit Ethernet And Fiber Optic Cabling; Fiber Optic Cabling - Linksys MGBLH1 - Gigabit LH Mini-GBIC SFP Transceiver User Manual

Gigabit Ethernet
About Gigabit Ethernet and Fiber Optic
Cabling
Gigabit Ethernet
Gigabit Ethernet runs at speeds of 1Gbps (Gigabit per second), ten times faster than 100Mbps
Fast Ethernet, but it still integrates seamlessly with 100Mbps Fast Ethernet hardware. Users can
connect Gigabit Ethernet hardware with either fiber optic cabling or copper Category 5e
cabling, with fiber optics more suited for network backbones. As the Gigabit standard gradually
integrates into existing networks, current computer applications will enjoy faster access time
for network data, hardware, and Internet connections.

Fiber Optic Cabling

Fiber optic cabling is made from flexible, optically efficient strands of glass and coated with a
layer of rubber tubing, fiber optics use photons of light instead of electrons to send and receive
data. Although fiber is physically capable of carrying terabits of data per second, the signaling
hardware currently on the market can handle no more than a few gigabits of data per second.
Fiber cables come with two main connector types. The most commonly used fiber optic cable is
multi-mode fiber cable (MMF), with a 62.5 micron fiber optic core. Single-mode fiber cabling is
somewhat more efficient than multi-mode but far more expensive, due to its smaller optic core
that helps retain the intensity of traveling light signals. A fiber connection always require two
fiber cables: one transmits data, and the other receives it.
Each fiber optic cable is tipped with a connector that fits into a fiber port on a network adapter,
hub, or switch. In the USA, most cables use a square SC connector that slides and locks into
place when plugged into a port or connected to another cable. In Europe, the round ST
connector is more prevalent.
You must use the Linksys MGBT1, MGBSX1, or MGBLH1 mini-GBIC modules with the Linksys
Gigabit Switches. The MGBSX1 and the MGBLH1 require fiber cabling with LC connectors, and
the MGBT1 requires a Category 5e Ethernet cable with an RJ-45 connector.
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