T640 Router Hardware Component Overview; T640 Chassis Description - Juniper T640 Hardware Manual

CHAPTER 3
T640 Router Hardware Component
Overview

T640 Chassis Description

Copyright © 2010, Juniper Networks, Inc.
These topics provide an overview of the T640 router hardware components:
T640 Chassis Description on page 13
T640 Midplane Description on page 16
T640 Flexible PIC Concentrators (FPCs) Overview on page 18
T640 PIC Description on page 29
T640 Switch Interface Boards (SIBs) Description on page 30
T640 Host Subsystem Overview on page 32
T640 SONET Clock Generators (SCGs) Overview on page 40
T640 Craft Interface Overview on page 41
T640 Connector Interface Panel (CIP) Description on page 46
T640 Routing Engine Ports on page 47
T640 Alarm Relay Contacts on page 48
T640 Power System Overview on page 48
T640 Cooling System Description on page 61
T640 Cable Management System Description on page 62
The T640 Core Router chassis is a rigid sheet metal structure that houses all the other
router components (see Figure 4 on page 15 and Figure 5 on page 16). The chassis
measures 37.45 in. (95.1 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3 cm) wide. For
physical specifications, see "T640 Physical Specifications" on page 341. The chassis can
be installed into many types of racks or cabinets. For more information. see "T640 Rack
Requirements" on page 66.
The chassis includes the following features (see Figure 4 on page 15 and Figure 5 on
page 16):
One pair of metal flanges for front-mounting or mounting in a four-post rack or cabinet.
One pair of metal brackets for center-mounting.
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