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5-8
Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
OL-32185-02
Chapter 5 Install and Upgrade Internal Modules and FRUs
Locate Internal and External Slots
Locate NEBS Module
Note
We recommend that you change the air filter every 3 months. However, examine the air filter once a
month (or more often in dusty environments) and replace it if it appears to be excessively dirty or
damaged. To comply with Telecordia GR-63-Core standard air filter requirements for NEBS
deployment, the air filter must be replaced, not cleaned.
shows the NEBS module on Cisco 4461 ISR.
Figure 5-3
NEBS Module Locations in Cisco 4461 ISR
Locate Internal and External Slots for Modules on Cisco 4451 ISR
shows the locations of internal modules on Cisco 4451 ISR motherboard. Internal modules
include DIMMs, PVDM4, and PoE daughter card.
shows the location of the available slots
that includes the Integrated Services Card (ISC) slot.
1
SM blank slot for NEBS
2
Power supply unit with reverse flow
3
PoE blank slot for NEBS. PoE is not allowed
for NEBS.
4
NEBS fan tray with reverse flow
5
Air filter for NEBS