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Data Path Processing
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JUNOSg 3.0 G10 CMTS Hardware Guide
64
Figure 22: G10 CMTS Data Flow
NIC Module
NIC Access
Module
HFC Connector Module
or SIM
DOCSIS
Module
Hybrid
Fiber/Coax
Network-
Side
Interface
Midplane
IP Data
IP Data
DOCSIS Data
DOCSIS Data
Chassis Control
Module
Hard Disk
Module
Management
Ports
Management
Data
G10 CMTS
- G10 CMTS 1
- Release 3.0 1
- Table of Contents 3
- Chapter 3 4
- Chapter 4 5
- List of Figures 9
- List of Tables 11
- About This Manual 13
- Audience 14
- Document Organization 14
- Related Documents 14
- Documentation Conventions 15
- Notes, Cautions, and Warnings 15
- Contact Juniper Networks 16
- Documentation Feedback 16
- Product Overview 17
- Chapter 1 19
- Head End 21
- Functional Overview 23
- G10 CMTS Components 24
- G10 CMTS Management 26
- G10 CMTS Hardware Overview 26
- System Overview 27
- Management 30
- Chapter 2 35
- Physical Characteristics 36
- Card Cage and Midplane 37
- Connector Function 38
- Front View 39
- Rear View 39
- Chassis Versions 41
- Power Supplies 42
- Hardware Component Overview 43
- Input Range 43
- 100-240V 43
- 200W Hot Swap 43
- Power Transition Modules 44
- Cooling and Fans 45
- DOCSIS Module 45
- Hot Swap 46
- Functional Characteristics 47
- Data Packet Processing 48
- Higher Layer Functions 49
- MAC Layer Functions 50
- Physical Layer Functions 50
- Modem Management 51
- MAC Layer Scheduling 51
- Cable Modem Management 51
- Dimension Value 52
- LED Label Color Function 52
- Chassis Control Module 53
- Specification Value 57
- Connector Label Function 57
- Switch Label Function 57
- NIC Module 58
- CLK PWR RTM OK 59
- LED Color Function 63
- Chassis Rear Modules 64
- NIC Access Module 64
- HFC Connector Module 66
- Switched I/O Module 69
- LED Function 70
- Hard Disk Module 71
- Routing Protocol Process 74
- Routing Protocols 74
- Routing and Forwarding Tables 75
- Routing Policy 75
- Interface Process 76
- SNMP and MIB II Processes 76
- Management Process 76
- Routing Engine Kernel 76
- Software Monitoring Tools 77
- Data Path Processing 78
- Downstream Data Path 78
- Upstream Data Path 79
- Initial Installation 81
- Safety Precautions 84
- Environment 88
- Mounting 89
- Coaxial Cable Requirements 91
- Summary Checklist 98
- Noise Measurement Methodology 99
- Setting Value 100
- Prepare the Site 101
- Parameter Value 102
- Chapter 5 109
- Ground the Chassis 110
- Rack Mounting 110
- Install the CMTS 111
- 17.3 in (439.4 mm) 113
- 18.6 in (472.6 mm) 113
- Install Power Supplies 117
- Install a DOCSIS Module 119
- Install a Hard Disk Module 124
- Install a NIC Module 124
- Install a NIC Access Module 124
- Cable the F-connector Ports 125
- Cable a NIC Module 129
- Cable a NIC Access Module 131
- Connect to Power Sources 135
- AC Power 135
- Power Cord 136
- Retainer Clip 136
- DC Power 137
- Chapter 6 139
- LED Status Meaning 141
- Power On and Configure the PC 143
- Chapter 7 149
- RF Measurements 151
- Upstream RF Measurement 153
- Chapter 8 157
- Flap List 158
- ! Amplifier thermal noise 159
- ! Fiberoptic link noise 159
- ! Ingress noise 159
- ! Stability 160
- Local Event Log 161
- Operational Commands 162
- Troubleshooting 163
- CMTS Power and Booting Issues 164
- CMTS Is Not Powering Up 164
- CMTS Powers Down 165
- Cable Modem is Dropped 172
- HFC Plant Related Issues 172
- Chapter 9 175
- Remove Power Supplies 176
- Replacement Procedures 177
- Fan Trays 178
- Replace a Fan Tray 178
- Front Fan Trays 179
- Rear Fan Tray 179
- Module Removal 182
- Remove a DOCSIS Module 182
- Remove a Hard Disk Module 186
- Remove a NIC Module 186
- Remove a NIC Access Module 186
- Appendixes 187
- Appendix A 189
- Immunity 190
- Appendix B 191
- Nominal Symbol Rate 194
- (Msym/sec) 194
- Nominal Channel Spacing 194
- (kHz) Bit Rate (bps) 194
- Appendix C 197
- Channel STD IRC HRC 198
- Numerics 205
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