Specifications

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Configuration
The SX-2000 LIGHT system consists of a non-redundant or redundant main control cabinet
and associated peripheral cabinets and Digital Service Unit (DSU) cabinets. Fiber optic cables
connect the peripheral cabinets and DSU cabinets to the main control cabinet. Copper cables
from the extensions terminate at the peripheral cabinet. Installers do not have to route the
extension cables between many floors or run the cables off-premises to a centrally-located
system.
Depending on the Fiber Interface Module (FIM) that is used, the peripheral cabinets and DSU
cabinets can be located up to 0.6 miles (1 km), 3.1 miles (5 km), or 8.7 miles (14 km) from the
main control cabinet. This versatility allows system resources such as lines, trunks, and digital
service applications to be physically distributed among several remote locations. For example,
one peripheral cabinet might provide the telephone service to a company’s head office, while
another provides telephone service to a manufacturing facility in a different building. Even
though the peripheral cabinets are in different locations, they connect to the same main control
cabinet by using a pair of fiber optic cables.
Control Cabinets
Redundant SX-2000 LIGHT System
The Control Redundant SX-2000 LIGHT system supports applications that require up to 3000
lines. The redundant main control cabinet provides full back-up, including independent power
supplies, so that system operation will not be affected if a main control component fails. When
the system switches to the alternate main control, calls in progress are not dropped and callers
are unaware of the system event. The redundant main control cabinet can support up to eleven
expanded peripheral nodes or five DSU nodes.