Platform Descriptions
3-4 Issue 8.0 July 2002
Shelf Descriptions 3
Power Distribution and Fuse Panel 3
The power distribution and fuse panel (Figure 3-2) is located at the top of each
FT-2000 OC-48 Lightwave System bay. It measures 2 inches high by 21.5 inches
wide by 12 inches deep. The power distribution and fuse panel has a removable
front cover that allows front access for shelf power connections. It accepts two
8-gauge power feeder stubs and distributes power to the shelves in the bay. The
power distribution and fuse panel is also equipped with six 10-amp fuses (two for
each shelf in the bay). Three fuses are for power feeder A and three fuses are for
power feeder B. For more information about power distribution, refer to Volume I,
Section 4, "Power."
Figure 3-2. Power Distribution and Fuse Panel
Low-Speed Shelf — System Controller 3
Purpose of Low-Speed Shelf — System Controller 3
The Low-Speed Shelf — System Controller provides high-level system control
functions and serves as an interface for up to 48 service DS3 and/or EC-1 signals,
eight 1+1 protected OC-3 signals (16 unprotected), two 1+1 protected OC-12
signals, or a mix of DS3, EC-1, OC-3 and OC-12 signals. In releases prior to
Release 7, the low-speed signals can be cross-connected to OC-48 high-speed
line 1W or 1E in groups of three DS3 signals, three EC-1 signals, or one OC-3
signal. In Release 7 and later releases, a single DS3 or EC-1 signal can also be
cross-connected to OC-48 high-speed line 1W or 1E.
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
BOTTOM SHELF/FAN
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
MIDDLE SHELF TOP SHELF
FT-2000
-48B -48B -48B
J68974E SD5G250-02
OC-48 Enhanced Lightwave Terminating Bay
OC-48 Add/Drop-Rings Terminal
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