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Cisco CRS-1 Carrier Routing System 8-Slot Line Card Chassis Site Planning Guide
OL-5802-06
Chapter 1 Cisco CRS-1 Carrier Routing System
The Cisco CRS-1 8-Slot Line Card Chassis
The Cisco CRS-1 8-Slot Line Card Chassis
The Cisco CRS-1 8-slot line card chassis is the main component of the Cisco CRS-1. The chassis is a
mechanical enclosure that contains a chassis midplane. The midplane holds the system modular services
cards (MSCs), their associated physical layer interface modules (PLIMs), and switch fabric cards. 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-1 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.
The following figures show the Cisco CRS-1 8-slot line card chassis from both the front (PLIM) and rear
(MSC) sides.
Figure 1-1 Front (PLIM) View of the 8-Slot Line Card Chassis
1 Cable management bracket 4 Air filter
2 Chassis vertical mounting brackets 5 Power modules
3 PLIM and RP slots (RPs in middle 2 slots)
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