Cisco CRS-1 - Manual (Page 10)

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Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
OL-5802-09
Chapter 1 Cisco CRS Carrier Routing System
The Cisco CRS 8-Slot Line Card Chassis
Caution A router with a mixture of 40 G and 140 G fabric cards is not a supported mode of operation. Such a
mode is allowed temporarily only during the upgrade process.
Note Throughout this document, the term Cisco CRS Carrier Routing system refers to both the Cisco CRS-1
Carrier Routing System and the Cisco CRS-3 Carrier Routing System, unless otherwise specified.
The Cisco CRS 8-Slot Line Card Chassis
The Cisco CRS 8-slot line card chassis is the main component of the Cisco CRS. The chassis is a
mechanical enclosure that contains a chassis midplane. The midplane holds the system modular services
cards (MSCs) and forwarding processor (FP) cards, their associated physical layer interface modules
(PLIMs), and switch fabric cards (SFCs). The Cisco CRS 8-slot line card chassis contains its own power
system; either fixed or modular configuration. See the
“Chassis Power System” section on page 2-1 for
more information. The chassis is mounted in a 19-inch equipment rack. See the “Equipment Rack
Considerations” section on page 4-3 for more information.
This section describes the main components of the Cisco CRS 8-slot line card chassis. It primarily
identifies the components that are considered field-replaceable units (FRUs), but where additional detail
is useful, identifies subassemblies that are not field replaceable.