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4-102 Cisco 4000 Series Installation Guide
Network Connection Considerations
Multimode Power Budget Example
The following is an example multimode power budget, based on the following variables,
and calculated to ensure sufficient power for transmission:
Length of multimode link = 3 kilometers (km)
4 connectors
3 splices
Higher order loss (HOL)
Clock recovery module (CRM)
Estimate the power budget as follows:
PB = 11.5 dB – 3 km (1.0 dB/km) – 4 (0.5 dB) – 3 (0.5 dB) – 0.5 dB (HOL) – 1 dB
(CRM)
PB = 11.5 dB – 3 dB – 2 dB – 1.5 dB – 0.5 dB – 1 dB
PB = 2.5 dB
The value of 2.5 dB indicates that this link would have sufficient power for transmission.
Multimode Power Budget Example of Dispersion Limit
Following is an example with the same parameters as the previous example, but with a
multimode link distance of 4 km:
PB = 11.5 dB – 4 km (1.0 dB/km) – 4 (0.5 dB) – 3 (0.5 dB) – 0.5 dB (HOL) – 1 dB
(CRM)
PB = 11.5 dB – 4 dB – 2 dB – 1.5 dB – 0.5 dB – 1 dB
PB = 1.5 dB
The value of 1.5 dB indicates that this link would have sufficient power for transmission.
But, due to the dispersion limit on the link (4 km x 155.52 MHz > 500 MHz/km), this link
would not work with multimode fiber. In this case, single-mode fiber would be the better
choice.
- About This Guide 1
- Document Organization 2
- Document Conventions 3
- Overview of the Cisco 4000 5
- Series Routers 5
- Series Specifications 8
- Software Compatibility 10
- Series Specifications 12
- Memory Systems 13
- Shared Memory Requirements 15
- Main Memory Requirements 17
- Cisco RPS Support 18
- Overview 19
- Fully Redundant Power 20
- RPS Features 21
- Preparing to Install 23
- Cisco 4000 Series Routers 23
- Safety with Electricity 24
- Safety Recommendations 25
- General Site Requirements 26
- Site Configuration Precautions 27
- Equipment Racks 28
- Power Supply Features 28
- Installation Checklist 29
- Site Log 30
- Required Tools and Equipment 30
- Inspecting the System 31
- • This publication 32
- • Cisco Information Packet 32
- Configuring the Cisco 4000 33
- Series Chassis 33
- Removing the Component Tray 34
- Replacing the Component Tray 41
- Making External Connections 43
- Unit Numbering 44
- AUX CONSOLE 46
- Use of the Slot Filler Panel 47
- Considerations 48
- Console Port Connections 49
- Auxiliary Port Connections 49
- Ethernet Connections 50
- Connectors 51
- Connection 52
- ETHERNET AUI 54
- Six-Port Ethernet Module 55
- Token Ring Connections 56
- IN-RING A 57
- IN-RING B 57
- Serial Connections 59
- EIA/TIA-232 Connections 60
- EIA/TIA-449 Connections 61
- V.35 Connections 62
- X.21 Connections 62
- EIA-530 Connections 63
- Interference Considerations 63
- Configuring Serial Connections 64
- Router connections 66
- EIA/TIA-449 V.35 X.21 66
- EIA/TIA-232 EIA-530 66
- G.703/G.704 Cable Connections 72
- • Multimode dual-attachment 74
- • Multimode single-attachment 74
- • Single-mode dual-attachment 74
- Connectors—End View 76
- CLASS 1 LASER PRODUCT 77
- LASERKLASSE 1 77
- OPT-BYPASS 79
- 87654321 81
- 1. kHz = kilohertz 82
- 2. nF = nanoFarad 82
- LOOPBACK 83
- LOCAL ALARM 83
- REMOTE ALARM 83
- T1 Cabling 84
- E1 Cabling 87
- ATM Connections 88
- XMTR RCVR 89
- RX ALARM 89
- RX CELLSBUSY 89
- RX CELLS 90
- ATM Cabling 91
- Figure 4-54 ST2 Connector 92
- Simplex (2) 94
- Duplex (1) 94
- BNC to RCVR 94
- BNC to XMTR 94
- Power Budget 97
- 500 MHz/km 98
- Single-Mode Transmission 101
- For Further Reference 102
- AC power supply 103
- DC power supply 104
- Terminal block cover 104
- Powering Up the Router 107
- Software Configuration 109
- Configuring the Router 111
- Configuring the Router 112
- Software Configuration 5-5 113
- Software Configuration 5-9 117
- Additional Configuration Tasks 118
- Software Configuration 5-11 119
- Configuring the T1 Interface 121
- Configuring the E1 Interface 123
- • Network protocol addresses 126
- Software Configuration 5-23 131
- Software Configuration 5-25 133
- Router# config terminal 134
- Router(config)# 134
- Router(config-if)# 134
- Router# disable 136
- Router> 136
- Software Configuration 5-29 137
- Software Configuration 5-31 139
- If You Need More Information 140
- Cabling Specifications 141
- 1. GND = Ground 143
- 2. CD = Carrier Detect 143
- Serial Cables 145
- <— indicates DCE to DTE 165
- DCE to DTE 172
- E1-G.703/G.704 Cable Pinouts 214
- HSSI Cable Pinouts 215
- HSSI Null- Modem Cable 216
- Ethernet Cable Pinouts 218
- 10BaseT Connector Pinouts 219
- 100BaseT Connector Pinouts 220
- 8 7 6 5 4 3 2 1 221
- Jackscrew Pin 21 223
- Token Ring Port Pinouts 225
- BRI Pinouts 226
- Channelized T1 Pinouts 227
- Channelized E1 Pinouts 228
- Replacing Memory in 233
- Replacing Main Memory SIMMs 236
- Removing Main Memory SIMMS 237
- Top view 238
- Front of the chassis 238
- Side view 238
- Installing Main Memory SIMMs 239
- Replacing Shared-Memory SIMMs 241
- Side view, SIMM inserted 243
- Helper Flash Memory SIMM 244
- Polarization notch 245
- System-code SIMM card 245
- Installing Flash-Memory SIMMs 246
- Figure C-9 Boot ROM Locations 249
- Cisco 4000 Series Virtual 251
- Configuration Register 251
- • Recover a lost password 252
- Configuring the Boot Field 254
- Cisco 4000-M ROM Monitor 259
- Cisco 4000-M ROM Monitor E-3 261
- > t m 262
- Running the Diagnostics 263
- Cisco 4500-M and 265
- Cisco 4700-M ROM Monitor 265
- Debugging Commands 268
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