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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:

Table 7 lists the FRUs for the M20 router.

Table 7: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs

Hot-Pluggable FRUs

FRUs That Require Powering Off the Router

Fan tray (front or Routing Engine)

Flexible PIC Concentrator (FPC)

Physical Interface Card (PIC)

Power supply (AC or DC)

Small form-factor pluggable (SFP)

Routing Engine

System and Switch Board (SSB)

Craft interface

For FRU replacement instructions, see Replacing Hardware Components.


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