Juniper T640 Hardware Guide

Part 2 Site Planning, Preparation, and Specifications
Chapter 9 Preparation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
T640 Site Preparation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
T640 Chassis Grounding Cable and Lug Specifications . . . . . . . . . . . . . . . . . . . . 118
T640 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
T640 Rack Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
T640 Clearance Requirements for Airflow and Hardware Maintenance . . . . . . . 122
T640 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Chapter 10 DC Power Requirements and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 125
T640 DC Power System Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 125
T640 DC Power Supply Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 126
T640 DC Power System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
T640 DC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
T640 DC Power Cable and Lug Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Chapter 11 AC Power Requirements and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 135
T640 AC Power System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
T640 Three-Phase Delta AC Power Supply Specifications . . . . . . . . . . . . . . . . . 136
T640 Three-Phase Wye AC Power Supply Specifications . . . . . . . . . . . . . . . . . . 136
T640 AC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
T640 AC Power Cord Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Chapter 12 Network Cable and Transceiver Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion . . . . 141
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable . . . . . . . . . . . 141
Attenuation and Dispersion in Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 141
Calculating Power Budget and Power Margin for Fiber-Optic Cables . . . . . . . . . 142
Calculating Power Budget for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 142
Calculating Power Margin for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 143
Chapter 13 Management Cable Specifications and Pinouts . . . . . . . . . . . . . . . . . . . . . . 145
T640 Routing Engine Interface Cable and Wire Specifications . . . . . . . . . . . . . . 145
T640 DB-9 Connector Pinouts for the Routing Engine AUXILIARY and CONSOLE
Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
T640 RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port . . . . . . 146
Part 3 Initial Installation and Configuration
Chapter 14 Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
T640 Router Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Chapter 15 Unpacking the T640 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Tools and Parts Required to Unpack the T640 Router . . . . . . . . . . . . . . . . . . . . . 153
Unpacking the T640 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Verifying the T640 Router Parts Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Chapter 16 Installing the Rack Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Installing the T640 Mounting Hardware for a Four-Post Rack or Cabinet . . . . . . 159
Installing the T640 Mounting Hardware for an Open-Frame Rack . . . . . . . . . . . 162
Copyright © 2017, Juniper Networks, Inc.vi
T640 Core Router Hardware Guide

Juniper T640 Specifications

General

Brand	Juniper
Model	T640
Category	Network Router
Language	English