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Connecting Fiber Optic Cables
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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
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Connecting Fiber Optic Cables
Signals between cabinets are carried by fiber optic cables. The electronic
signals at 1 cabinet must be converted into optical signals. These optical signals
are converted back into electronic signals at another cabinet.
The fiber optic cables from the DEFINITY System route to a Lightguide
Interconnect Unit (LIU), connect to the outside fiber plant, and then connect to
the remote DEFINITY System via an LIU.
Two types of fiber optic cables are used on DEFINITY Systems: multi-mode and
single-mode. See Ta b l e A- 1
.
■ Multi-mode fiber uses LEDs as its light source and is less expensive than
single-mode fiber. There are 2 common types of multi-mode fiber:
— 62.5 micron core
— 50.0 micron core
■ Single-mode fiber is more expensive than multi-mode because it uses
LASER light as its light source. Single-mode fiber typically uses the 8-10
micron core fiber.
Table A-1. Fiber Optic Reference
Fiber Core
Size
Tra n sc ei v er
Model
Operating
Wavelength
(Nanometers) Fiber Type
50 or 62.5 9823A 850 nm Multi-mode
50 or 62.5 9823B 1300 nm Multi-mode
8.3 -9.0 300A 1300 nm Single-mode