Americas Headquarters
Text Part Number OL-17309-02
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N T E N T S
AC Power
Measuring the Downstream RF Signal at the Upconverter Output
Maintaining the Cisco uBR7225VXR Router
Coaxial Cables C-1
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Preface
Document Revision History
Document Objectives
Revision Date Change Summary
Document Organization
Audience
Chapter Title Description
Document Conventions
Appendix G, Site Log
Obtaining Documentation and Submitting a Service Request
Cisco uBR7225VXR Overview
Cisco uBR7225VXR Universal Broadband Router
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Cisco uBR7225VXR Router Chassis
Cable interface line card slot
Cisco uBR7225VXR Network Interface Overview
Card Slot and Logical Interface Numbering
MAC-Layer Address
Cisco uBR7255VXR Chassis and Cable Interface Line Cards
Supported System Configurations Overview
Basic Internet Access Services
Two-Way HFC Cable Network Example
VPN Services
IP Telephony Services
Telco Return
HFC
Hardware Component Descriptions
Network Processing Engine
NPE Comparisons
Cisco Cable Interface Line Cards
Power Supplies
Cisco uBR7225VXR AC-Input Power Supply
Fan Trays
Cisco uBR7225VXR Fan Tray
Internal Airflow-Top View
Cisco uBR7225VXR Chassis
Subchassis and Midplane
CompactFlash Disk
Top Back
Cisco uBR7225VXR Overview Hardware Component Descriptions
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Installation
Safety Recommendations
Lifting the Cisco uBR7225VXR Router Safely
Safety with Electricity
Lifting the Chassis Cisco uBR7246 Router Shown
Preventing Electrostatic Discharge Damage
Site Requirements
AC Power
Site Environment
General Precautions
Site Configuration Maintaining Normal Operation
Specification Minimum Maximum
Required Network Information
Power Considerations
Before You Begin
Installation Tools
Rack-Mount and Cable-Management Kit
Equipment Required to Verify Your Plant’s RF Setup
Shipping Container Contents
Provisioning the Cable Headend
Two-Way Data and VoIP
Diplex Filters
Headend Certification
Receivers
Dial-Up/Remote Access Servers
DHCP, DNS, TFTP, and TD Servers
VoIP Gateways and Gatekeepers
Authentication, Authorization, and Accounting Servers
VoIP Sgcp Pass-Through
Headend Wiring
Interference Considerations
Equipment Racks
17.32 23.875 21.875
Site Preparation Checklist
Task Verified By Date
Component Checklists
Task Verified By Date
Installing the Cisco uBR7225VXR Router
Cisco uBR7225VXR Router Installation Checklist
Cisco uBR7225VXR Router Chassis Rack-Mounting Options
Typical 4-Post Equipment Rack Posts and Mounting Strips
Rack-mount bracket
Installing the Chassis in a Telco-Type Rack
Cable-Management Bracket Requirements
Rack-mount bracket Cable-management bracket
Installing the Brackets on the Chassis
Installing Rack-Mount Brackets on the Rear of the Chassis
Installing Rack-Mount Brackets on the Front of the Chassis
Installing Rack-Mount Brackets in the Middle of the Chassis
Installing the Chassis in the Rack
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Cabling
Connecting Cable Interface Line Card Cables
Console and Auxiliary Port Connection Equipment
Auxiliary Port Signals
Console Port Signals
Pin Signal Direction Description
Connecting Power
Protective Grounding
Connecting to the AC-Input Power Supply
Powering On the Cisco uBR7225VXR Router
14 Connecting AC-Input Power
Configuring the Interfaces
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Connecting the Cisco uBR7225VXR Router to the Cable Headend
Two-Way Data Headend Architecture
One-Way Data Headend Architecture
RF and Digital Data Overview
Measuring the Downstream RF Signal
Connecting and Configuring the Downstream
Installing and Configuring the Upconverter
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Viewing the Downstream if Signal on a Spectrum Analyzer
Measuring the Downstream RF Signal at the Upconverter Output
Overloaded Spectrum Analyzer Input
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Connecting and Configuring the Upstream
Connecting the Upstream to the Optical Receiver
Docsis Specification
Channel Bandwidth Cisco MC11 Fpga
Testing the Upstream Configuration
30 km Fiber node Milliwatt Measure +10 dBmV at this point
Optical receiver
Downstream Optical +10 dBmV Receiver +13 dBmV Attenuator
Measuring the Upstream RF Signal
Measuring the Upstream RF Signal Using a Spectrum Analyzer
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Analyzing the Upstream RF Signal
29 Analyzing the Upstream RF Signal-64-Byte Data Packets
30 Analyzing the Upstream RF Signal-1500-Byte Data Packets
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Center Frequency Minimum Resolution
Using the Zero-Span Method with Adjacent Upstream Channels
Symbol Rate +/-1/2 Symbol Rate Bandwidth
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35 Vector Signal Analyzer Plot of Upstream Data Burst
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39 Preamble Amplitude Before Center Frequency Adjustment
41 Original Preamble Viewed with Accelerated Sweep Time
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Connecting the Cisco uBR7225VXR Router to the Cable Headend
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Connecting the Cisco uBR7225VXR Router to the Cable Headend
Configuring the Digital Signal
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Maintaining the Cisco uBR7225VXR Router
Online Insertion and Removal
Environmental Monitoring and Reporting Functions
Environmental Monitoring
Reporting Functions
Parameter High Warning High Critical Shutdown
Router# show environment
Temperature ranges and values are subject to change
Fan Failures
Overview
Troubleshooting
Providing Information
Problem Solving with Subsystems
Troubleshooting Problem Solving with Subsystems
Identifying Startup Problems
Power Subsystem
Cooling Subsystem
Troubleshooting the Network Processing Engine
Processor Subsystem
Troubleshooting Cable Interface Line Cards
Verifying the Downstream Signal
Other Troubleshooting Information Websites
Troubleshooting Verifying the Downstream Signal
Cisco uBR7225VXR Router Specifications
Description Specification
Broadband Routers at the following URL
RF Specifications
Channel Symbol Rate Raw Data Rate Nominal Data
Bandwidth, MHz Msym/sec Mbps Rate, Mbps
Channel Qpsk Raw
Downstream RF Channel Transmission Characteristics
Docsis 1.0 Transmission Characteristics
Parameter Value
Upstream RF Channel Transmission Characteristics
Docsis 1.1 Transmission Characteristics
EuroDOCSIS Transmission Characteristics
Downstream RF Channel Transmission Characteristics
Upstream RF Channel Transmission Characteristics
Electrical Input and Output
Parameter Value
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Cable Specifications
Coaxial Cables
Console and Auxiliary Port Cables and Pinouts
Identifying an RJ-45 Rollover Cable
Console Port Cables and Pinouts
RJ-45-to-DB-9
Auxiliary Port Cables and Pinouts
Fast Ethernet Port Cables and Pinouts
Identifying an RJ-45 Crossover Cable
RJ-45 Pin
Identifying an RJ-45 Straight-Through Cable
RJ-45 Pin Description
Fiber-Optic Cables and Connectors
Figure C-5 Duplex SC Cable Connector
Industry-Standard Wiring Plans
About Wiring Standards
TIA/EIA Standards Information
Optical Fiber Color Codes
Position Color
Telephone Wire Color Codes
Pair Number Wire Number Solid Color Stripe Color Pin Number
Pair Number Wire Number Solid Color Stripe Color Pin Number
Pair Number Wire Number Solid Color Stripe Color
White Blue Green Red Orange Black Yellow
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Frequency Allocation Tables
Http//developer.apple.com Http//atxnetworks.com
Standards Comparisons
B1, G D1, K
Ntsc Cable Television Channels and Relative Frequencies
Freq MHz Carrier Visual Aural
Table E-4
Freq MHz Carrier Visual Aural
Table E-4
Ntsc M Cable Television Frequencies for Japan
Table E-5 Japanese Channel Assignments
PAL/SECAM Cable Television Channels and Relative Frequencies
Bandwidth Visual Carrier Aural Carrier
Channel
Channel Bandwidth Visual Carrier Aural Carrier Number MHz
Table E-6
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North American Channel Plans
Manufacturers for Headend Provisioning Requirements
Manufacturer Website or Phone Number Products/Model
Agilent Agilent 89411A
European Channel Plans
Agilent Agilent 8591C Tektronix 2715 Sunrise Telecom AT2000R
Site Log
Initials
Symbols
GL-2
GL-3
GL-4
GL-5
GL-6
D E
IN-2
IN-3
IN-4
IN-5
IN-6
IN-7
IN-8
