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    M40e Field-Replaceable Units (FRUs)

    Field-replaceable units (FRUs) are router components that can be replaced at the customer site. Replacing most FRUs requires minimal router downtime. The router uses the following types of FRUs:

    • Hot-removable and hot-insertable FRUs—You can remove and replace these components without powering off the router or disrupting the routing functions.
    • Hot-pluggable FRUs—You can remove and replace these components without powering down the router, but the routing functions of the system are interrupted when the component is removed.
    • FRUs that require powering off the router—You must power off the router before removing these components.

    Table 1 lists the FRUs for the M40e router.

    Table 1: M40e Field-Replaceable Units

    Hot-Removable and Hot-Insertable FRUs

    Hot-Pluggable FRUs

    FRUs That Require Powering Down the Router

    Air filter

    Fan tray (located behind the cable management system)

    Flexible PIC Concentrator (FPC)

    Physical Interface Card (PIC)

    Power supply (AC or DC)

    Small form-factor pluggable (SFP)

    Miscellaneous Control Subsystem (MCS)

    Packet Forwarding Engine Clock Generator (PCG)

    Routing Engine

    Switching and Forwarding Module (SFM)

    Circuit breaker box (on DC-powered router only)

    Connector Interface Panel (CIP)

    Published: 2010-10-28