Cisco 7246 - uBR Router, Руководство по установке оборудования

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C-1
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
OL-5421-03
A P P E N D I X
C
Cable Specifications
This appendix contains cable and cable pinout information for the Cisco uBR7200 series universal
broadband routers.
•
Coaxial Cables, page C-1
• Console and Auxiliary Port Cables and Pinouts, page C-2
•
Fast Ethernet Port Cables and Pinouts, page C-4
• Fiber-Optic Cables and Connectors, page C-6
Note This appendix specifies pinouts only for the pins used. Pins not listed in the tables are not connected.
Coaxial Cables
The coaxial cable used to connect the Cisco uBR7200 series universal broadband routers at the headend
should be very high-quality cable.
Cisco recommends that you use a headend-grade coaxial cable or a quad-shield coaxial cable to connect
the cable modem cards to the hybrid fiber-coaxial (HFC) network. The center conductor must be straight
and extend 1/8 inch (3.2 mm) beyond the end of the connector, and the connector should be securely
crimped to the cable. The following headend cables are recommended:
• 59-series cable (preferred)—20 AWG (0.032 inch/0.81 mm diameter) silver plated, copper-clad,
steel center conductor; bonded foil inner shield; 95 percent braid second shield; nonbonded foil third
shield; 95 percent braid fourth shield.
•
59-series quad shield—20 AWG (0.032 inch/0.81 mm diameter) copper-clad steel center conductor;
bonded foil inner shield; 53 percent braid second shield; nonbonded foil third shield; 34–35 percent
braid fourth shield.
• 6-series quad shield—18 AWG (0.0359 inch/0.91 mm diameter) copper-clad steel center conductor;
bonded foil inner shield; 60 percent braid second shield; nonbonded foil third shield; 40–42 percent
braid fourth shield.
Note Any of the three of the coaxial cables listed can be used to connect a Cisco cable interface line card to
the HFC network; however, the consistent use of 59-series cable is preferred. If you connect a 59-series
cable to a cable interface line card that was previously connected using 6-series cable, the difference in
the center connector diameter might cause intermittent connectivity loss.