Juniper MX2020 Hardware Manual page 5

Part 2
Chapter 10
Chapter 11
Chapter 12
Copyright © 2015, Juniper Networks, Inc.
MX2020 Nine-Feed Single Phase AC Power Distribution Module Description . . . 92
MX2020 AC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
MX2020 DC Power Distribution Module Description . . . . . . . . . . . . . . . . . . . . . . . 94
MX2020 DC Power Distribution Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
MX2020 DC Power Supply Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
MX2020 DC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Site Planning, Preparation, and Specifications
Planning and Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Overview of Preparing the Site for the MX2020 Router . . . . . . . . . . . . . . . . . . . . 103
MX2020 Cabinet Airflow Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
MX2020 Cabinet Size and Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . 106
MX2020 Chassis Moving Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
MX2020 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
MX2020 Rack Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Rack Size and Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Spacing of Mounting Bracket Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Connection to the Building Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
MX2020 Moving Requirements and Guidelines Using a Router Transport Kit . . . 113
Router Transport Kit Turning Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Router Transport Kit Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
MX2020 Router Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
MX2020 Router Grounding Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
MX2020 Chassis Grounding Points Specifications . . . . . . . . . . . . . . . . . . . . . 117
MX2020 Router Grounding Cable Lug Specifications . . . . . . . . . . . . . . . . . . 118
MX2020 Router Grounding Cable Specifications . . . . . . . . . . . . . . . . . . . . . . 119
MX2020 Site Preparation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Clearance Requirements for Airflow and Hardware Maintenance for the MX2020
Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Rack-Mounting Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Transceiver and Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion . . . . 127
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable . . . . . . . . . . . 127
Attenuation and Dispersion in Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 128
Calculating Power Budget and Power Margin for Fiber-Optic Cables . . . . . . . . . 128
Calculating Power Budget for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 129
Calculating Power Margin for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 129
CB-RE Interface Cable and Wire Specifications for MX Series Routers . . . . . . . . 130
Installing an MX2020 Three-Phase Wye AC Power Cord . . . . . . . . . . . . . . . . . . . 131
Network Cable and Transceiver Overview for ACX Series, M Series, and MX Series
Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Supported Network Interface Standards by Transceiver for ACX, M, MX, and T
Series Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Pinout Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
RJ-45 Connector Pinouts for MX Series CB-RE Auxiliary and Console Ports . . . . 145
RJ-45 Connector Pinouts for an MX Series CB-RE Management Port . . . . . . . . . 146
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