T640 Field-Replaceable Units (Frus); T640 Router Fru Overview; T640 Fru List; Table 3: Field-Replaceable Units - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide

T640 Field-Replaceable Units (FRUs)

T640 Router FRU Overview

Related
Documentation

T640 FRU List

4
T640 Router FRU Overview on page 4
T640 FRU List on page 4
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.
If the router contains a redundant host subsystem, the Control Board (T-CB), and the
Routing Engine are hot-removable and hot-insertable. Before you replace a T-CB or a
Routing Engine, you must take the host subsystem offline.
T640 Router Description on page 3
T640 FRU List on page 4
Taking the T640 Host Subsystem Offline on page 198
Table 3 on page 4 lists the FRUs for the router.

Table 3: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs
Air filters
Flexible PIC Concentrators (FPCs)
Front and rear fan trays
Physical Interface Cards (PICs)
Power supplies
Backup SONET Clock Generators (SCGs)
Switch Interface Boards (SIBs)
Master T-CB (if nonstop active routing is
configured)
Backup T-CB
Backup Routing Engine
Hot-Pluggable FRUs
Connector Interface Panel (CIP)
Nonredundant T-CB
Master T-CB (if nonstop active routing is not
configured)
Nonredundant Routing Engine
Master Routing Engine (if nonstop active routing
is not configured)
Master and nonredundant SCGs
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