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B-4 Rev B NetDoc™
User’s Manual
Crossover Hub
Two machines can hook together with a simple crossover cable, but otherwise every machine
on the network must have its own single lead to a port on the hub. The hub, therefore, must
have enough ports to support the number of machines you want to network. Multiple hubs can
be connected together to allow larger networks.
Descriptors
In many cases, a descriptor will be needed for an element of a pathway, space or devide. See
Appendix C for a list of commonly used descriptors.
Entrance Facility
Location where cabling enters the building. Cabling often enters the building underground.
Three or more conduits are usually required to connect an entrance wiring closet (TC) to the
nearest manhole (outside space) or other location with telecommunications facilities. An
entrance facility may also contain campus-wide backbone connections
Entrance Wiring Closet
See Telecommunication Closet.
Equipment Rooms and Main Cross-Connects
An equipment room provides a termination point for backbone cabling that is connected to one
or more telecommunication closets. It may also be the main cross-connection point for the
entire facility. In a campus environment, each building may have its own equipment room, to
which telecommunication closet equipment is connected, and the equipment in this room may
then be connected to a central campus facility that provides the main cross-connect for the
entire campus.
Faceplates
A fixed connection where a horizontal cable terminates and work area equipment can be
connected. Also referred to as outlets. While many elements of cabling infrastructure can be
added after the geographical infrastructure is set up, faceplates should be set up first.
Fiber Optic Cable
An optical fiber cable is a cable containing one or more optical fibers. The optical fiber
elements are typically individually coated with plastic layers and contained in a protective tube
suitable for the environment where the cable will be deployed.
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