System information

© 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential Presentation_ID Kirkpatrick 092509
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XD Fan Assembly
 The chassis uses a negative pressure fan system to pull cooling air from
the ambient environment. Three fans are housed in a field-replaceable
assembly attached at the back of the chassis.
 The fan assembly can be removed for inspection and maintenance, to
provide access to the DC-to-DC converters inside the chassis, or to
remove either of the AC-to-DC bulk power supply modules.