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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter 2 Cards Specifications
2.2.8 Mechanical Equipment
2.2.8 Mechanical Equipment
The following section describes mechanical equipment such as the bay frame, optical shelf, dispersion
compensation shelf, Y-cable shelf, fiber storage units, and 32-channel patch-panel units.
2.2.8.1 Bay Frame
DWDM cards use a generic standardbay frame, which is compliantwith ANSI Standard Seismic 19-inch
and 23-inch Bay Frames (Telcordia GR-63-CORE) and/or ETSI 600 mm x 300 mm (ETS 300-119, ETS
300-019, CEI EN 60917 and IEC 61587).
Floor mounting depends on the frame or cabinet that the customer chooses.
2.2.8.2 Optical Shelf
The shelf assemblies used in the ONS 15454 DWDM system and SONET/SDH systems are the same.
The ONS 15454 is simple to engineer and flexible, in order to reduce the equipping rules as much as
possible.
The system dimensions for an ONS 15454 ETSI rack are 617 mm(18.17”) high x 432 mm (17”) wide x
280 mm (11”) deep. The dimensions of the ANSI system are 18.1” (461.6 mm) high x 17”(431.8 mm)
wide x 12”(305.0 mm) deep. A total of four shelves fit into a standard ANSI rack. A total of three shelves
fit into ETSI racks.
The subrack has 17 card slots, which are numbered from 1 starting at the left. Each slot is labeled with
an icon that must match the icon on the plug-in card’s faceplate. This enables easy identification of
card/slot compatibility. Slots 7 through 11, indicated in white, are dedicated to system operations. These
slots are known as common-control card slots. Slots 1 through 6 and 12 through 17, indicated in yellow
and blue, are dedicated to traffic cards, such as OSC cards, optical add/drop cards, optical amplifier
cards, and transponder/muxponder cards.
2.2.8.3 Dispersion Compensation Shelf
The dispersion compensation shelf is 1 RU in height. Two DCUs (one for each direction) can be housed
in the dispersion compensation shelf. The shelf is not powered or cooled because the DCUs are optically
passive.
2.2.8.4 Y-Cable Shelf
The Y-cable shelf houses up to eight Y-cable modules and all relevant patchcords. The Y-cable shelf has
a height of 2 RU and can be installed in 19”(482.6 mm) ANSI or ETSI racks. See Figure 2-14.