BRIEF OVER VIEW OF FIBER OPTIC CABLE ADVANTAGES OVER
Fiber optic networks operate at high speeds - up into the gigabits
large carrying capacity
Signals can be transmitted further without needing to be
"refreshed" or strengthened.
Greater resistance to electromagnetic noise such as radios,
motors or other nearby cables.
Fiber optic cables costs much less to maintain.
There are three types of fiber optic cable commonly used: single mode, multimode and
plastic optical fiber (POF)
Fiber optic cable functions as a "light guide," guiding the light introduced at one end of
the cable through to the other end. The light source can either be a light-emitting diode
(LED)) or a laser.
Fiber optic cabling carries signals, which have been converted from electrical to optical (pulses of
form. It consists of the core, either an extremely thin cylinder of glass or optical quality plastic,
surrounded by a second glass or plastic layer called the cladding. The interface between the core
cladding can trap light signals by a process called Total Internal Reflection (TIR), resulting in the
optical fiber acting as a light pipe. Protective buffer and jackets materials are used to cover the
cladding layer. This type of cabling is less frequently used because it is somewhat more
however, it is rapidly decreasing in both raw cost and installed cost.
Fiber optic cables are not susceptible to interference, such as radio waves, fluorescent lighting, or
other source of electrical noise. It is the common cable used for network backbones and can
up to 1000 stations, carrying signals beyond 25 km. Fiber terminations include SC, ST, and a
of proprietary connectors. Maximum data transfer rate is virtually limitless: tens and hundreds of
gigabits per second, limited only by the electronics on each end of the fiber.
Unshielded Twisted Pair (UTP)
Unshielded Twisted Pair (UTP) is a set of three or four pairs of wires with each wire in each pair
twisted around the other to prevent electromagnetic interference. UTP cabling uses RJ-45, RJ-11,
232, and RS-449 connectors. Because it is less expensive and easier to install, UTP is more
than Shielded Twisted Pair (STP) or Coaxial Cabling. An example of UTP application is telephone
networks, which use RJ-11 connectors, and 10BASE-T networks, which use RJ-45 connectors.
comes in the form of Cat 2, 3, 4, and 5 grades; however, only Cat 5 is now recommended for any