T4000 Field-Replaceable Units; Table 40: Field-Replaceable Units - Juniper T4000 Hardware Manual

T4000 Router Hardware Guide

T4000 Field-Replaceable Units

Related
Documentation
216
Replacing a T4000-SIB on page 279
Replacing a T4000 TXP-LCC-3D SIB on page 282
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.
Before you replace a component in the host subsystem, you must take the host subsystem
offline.
Table 40 on page 216 lists the FRUs for the router.

Table 40: Field-Replaceable Units

Hot-Removable and Hot-Insertable FRUs
Air filters
Flexible PIC Concentrators (FPCs)
Front and rear fan trays
PICs
Redundant power supplies
Backup SONET Clock Generator (SCG)
Switch Interface Boards (SIBs)
Backup control board
Master control board (if nonstop active routing
is configured)
Backup Routing Engine
Master Routing Engine (if nonstop active routing
is configured)
T4000 Hardware Component Overview on page 13
T4000 Component Redundancy on page 15
Tools and Parts Required for Replacing T4000 Hardware Components on page 217
Hot-Pluggable FRUs
Connector Interface Panel (CIP)
Nonredundant control boards
Master control board (if nonstop active routing
is not configured)
Nonredundant Routing Engine
Master Routing Engine (if nonstop active routing
is not configured)
Master SONET Clock Generator (SCG)
Nonredundant SONET Clock Generator (SCG)
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