Chassis; Switch Fabric Card Slots; Alarm Card Slots; Chassis Backplane - Cisco 12006 series Product Overview

Chassis

Switch Fabric Card Slots

Alarm Card Slots

Note

Chassis Backplane

Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
1-8
The switch fabric circuitry resides in five fabric card slots: two for CSCs and three
for SFCs. (See Figure
fabric circuitry, see the
page 1-10.
Cisco 12006 and Cisco 12406 routers are equipped with two alarm cards. These
cards are positioned beside one another and occupy two card slots directly under
the CSC slots. (See Figure
cards, see the "Alarm Cards" section on page
The two alarm cards occupy slots under the two CSC slots in the CSC card cage,
but are not part of the switch fabric.
All of the card cages are tied together electrically through a passive system
backplane in the back of the chassis. Nearly all of the wiring and circuitry in the
chassis is contained within or connected to the chassis backplane. The chassis
backplane distributes DC power to all of the cards in the chassis as well as the
blower module, and provides the physical communication pathway between
cards, both for network data and system communication across the internal system
maintenance bus (MBus).
1-1.) For more information about the role of the switch
"Multigigabit Crossbar Switch Fabric" section on
1-1.) For more information about the role of the alarm
Chapter 1 Product Overview
1-35.
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