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Juniper was the first North American IP routing vendor to achieve the prestigious TL 9000 certification by the Quality of Excellence for Suppliers of Telecommunications (QuEST) Forum in the router category, for design, development, provision and service and support.



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M120 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.

Table 1 lists the FRUs for the M120 router. If the router contains a redundant host subsystem, the Control Board (CB) and the Routing Engine are hot-removable and hot-insertable. Before you replace a CB or a Routing Engine, you must take the host subsystem offline (see Taking the M120 Host Subsystem Offline).

Table 1: M120 Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs

Hot-Pluggable FRUs

Air filter

Craft interface

Control Board (CB) (if redundant)

Routing Engine (if redundant)

Forward Engine Boards (FEBs)

Flexible PIC Concentrators (FPCs)

Compact Flexible PIC Concentrators (CFPCs)

AC and DC power supplies (if redundant)

Front and rear fan trays

Physical Interface Cards (PICs)

Control Board (CB) (if not redundant)

Routing Engine (if not redundant)

Forwarding Engine Boards (FEBs) (if not redundant)

Published: 2009-09-24