C H A P T E R 1
Product Overview
This chapter provides an overview of the Cisco XR 12416 router. It contains physical descriptions of the router hardware and major components, as well as functional descriptions of the hardware-related features.
Physical and Functional Description of Router
The Cisco XR 12416 router chassis is a sheet-metal enclosure that houses router components. The major components consist of three power supplies, upper and lower line card cages, a switch fabric card cage, and upper and lower blower modules. Power is distributed to these components over the chassis backplane.
All router models contain the following major components (Figure 1-1):
•Power shelf and power supplies—Three AC or DC power entry modules (PEMs) provide power to the router. See the “AC and DC Power Subsystems” section on page 1-4for additional information.
•Upper blower module—Supplies cooling air to the upper half of the router so it does not overheat. See the “Blower Module” section on page 1-30for additional information.
•Upper and lower cable management brackets—Used to neatly route line card cables. See the “Upper and Lower Cable Management Brackets” section on page 1-30for additional information.
| | Cisco XR 12416 Router Installation Guide | | |
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| OL-13833-01 | | | 1-1 |
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