Cisco CRS-1 - Manual (Page 15)

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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
Figure 1-5 shows the rear view of a Cisco CRS 8-slot line card chassis with a fixed configuration AC
power system installed.
Figure 1-5 Rear View of the 8-Slot Line Card Chassis—Fixed Configuration Power Shown
Chassis Components
The Cisco CRS 8-slot LCC contains the following components:
• As many as eight modular services cards (MSCs) or forwarding processor (FP) cards (both types are
also called line cards), and eight physical layer interface modules (PLIMs). The MSC or FP and
PLIM are an associated pair of cards that mate through the chassis midplane. The MSC or FP
provides the forwarding engine for Layer 3 routing of user data, and the PLIM provides the physical
interface and connectors for the user data.
1 Upper fan tray (beneath cover) 5 Lower fan tray
2 Chassis vertical mounting brackets 6 Cooling air outlet screen
3 Switch fabric card (half-height) slots 7 Power distribution units (PDUs)
4 MSC slots
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