Cisco ASR-920-12SZ-IM Hardware Installation Manual page 4

Contents
Preparing for Installation
C H A P T E R 2
Cisco ASR-920-12SZ-IM Aggregation Services Router Hardware Installation Guide
iv
RJ-45 LEDs
14
Power Supply Unit LEDs
System-Interface LED Behavior
Online Insertion and Removal
Licensing
16
19
Safety Guidelines
20
Safety Warning Statements
Safety Guidelines for Personal Safety and Equipment Protection
Safety Precautions for Module Installation and Removal
Safety with Electricity
21
Power Supply Considerations
Preventing ESD Damage 22
Site Planning
23
General Precautions
23
Site Planning Checklist
23
Site Selection Guidelines
Environmental Requirements
Physical Characteristics
Air Flow Guidelines 24
Air Flow Guidelines for ETSI Rack Installation
Floor Loading Considerations
Site Power Guidelines
27
Electrical Circuit Requirements
Site Cabling Guidelines
27
Asynchronous Terminal Connections
Interference Considerations
Electromagnetic Interference
Radio Frequency Interference
Lightning and AC Power Fault Interference
Rack-Mounting Guidelines
Precautions for Rack-Mounting
Rack Selection Guidelines
Equipment Rack Guidelines
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