Platform Descriptions
Issue 8.0 July 2002
3-47
Shelf Descriptions 3
Power Distribution and Fuse Panel 3
The power distribution and fuse panel (Figure 3-26) is located at the top of each
FT-2000 OC-48 D-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 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 eight 10-amp fuses (two for each
shelf in the bay). Four fuses are for power feeder A and four fuses are for power
feeder B. For more information about power distribution, refer to Volume I, Section
4, "Power."
Figure 3-26. FT-2000 OC-48 D-Bay Power Distribution and
Fuse Panel
Low-Speed Shelf — System Controller 3
Purpose of Low-Speed Shelf — System Controller 3
There are no differences between the Low-Speed Shelf(s) used in the E-Bay and
D-Bay. Each 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 Release 7.1.0
and later releases, IS-3 and OC-12 low-speed signals can be interfaced. All of
these Low-Speed signals can be cross-connected to either the 1W or 1E
high-speed line.
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
BOTTOM CHS SHELF/FAN
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
FUSE
LIFT UP
10A,60V
-48A
FUSE
LIFT UP
10A,60V
UPPER CHS SHELF
LOWER LOW SPEED SHELF
-48B -48B -48B
FUSE
LIFT UP
10A,60V
-48B
FUSE
LIFT UP
10A,60V
-48B
UPPER LOW SPEED SHELF
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