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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Connecting Fiber Optic Cables
Page A-10Optical Cross-Connect Hardware
A
100A and 200A Lightguide Equipment
Optical interconnects consist of LIUs without a trough between them. Incoming
and outgoing cables connect directly to each other. This arrangement makes
circuit changes more difficult, but reduces optical losses.
Optical cross-connect and interconnect fields are made up of the following:
■ 100A or 200A LIU
■ 10A Lightguide Coupling Panel
■ C2000A-2 Connector Coupling (Multi-Mode) or C3000A-2 Connector
Coupling (Single-Mode)
■ 1A4 Lightguide Trough
■ 1A6 Lightguide Trough
■ Fiber Interconnect Cable (Multi-Mode or Single-Mode)
Lightguide Interconnect Units
The 100A LIU consists of a cabinet with retainer rings to hold slack fiber cables,
mounting cutouts for two 10A lightguide connector panels, and a door with circuit
labels on each side. See Figure A-4
. The 100A provides up to 12 terminations.
The 200A Lightguide Interconnect Unit (LIU) can terminate up to 24 fiber
connections. These fiber connections can be either single-mode or multi-mode.
Lightguide Troughs
Two types of troughs are used with optical cross-connect hardware. The vertical
trough secures single fiber optic jumpers routed between LIU columns, and the
horizontal trough is used at the bottom of an LIU column to store cable slack.