Chapter 4 Cabling the RF Switch With the Cisco uBR10012 CMTS Cable Interface Line Cards
RF Cable Assemblies for Cisco uBR10-MC5X20S/U/H Line Cards
Note The header blocks are slightly beveled at the top for easy identification. The alignment pins on the header blocks are offset, preventing you from accidentally connecting the header block upside down.
F-Connectors and MCX Connectors
MCXFP—75-ohm MCX connector available from WhiteSands Engineering. This connector is attached to the end of the cable that terminates at the Cisco uBR 3x10 RF Switch.
ASFP or alternate—F-connectors available from WhiteSands Engineering. This connector is attached to the end of the cables that terminate at the upstream and downstream ports on the cable interface line cards. The output cabling kit includes 13 F-connectors to use for modification or repair.
Note An extraction tool is shipped with the Cisco uBR 3x10 RF Switch to remove MCX connectors from the header blocks. Additional extraction tools can be obtained from WhiteSands Engineering.
Attenuators
A 10-dB attenuator may be required (due to a higher IF output, +42 dBmV), between the line card and the upconverter IF input ports.
RF Cable Assemblies for Cisco uBR10-MC5X20S/U/H Line Cards
The following sections describe the coaxial cable and header block assembly required to support N+1 redundancy between the Cisco uBR 3x10 RF Switches and a Cisco CMTS populated with
Cisco uBR10-MC5X20S/U/H cable interface line cards.
Note Although you may construct and implement your own cabling system, we recommend using the
N+1 redundancy cabling solution designed specifically for this Cisco CMTS feature (Cisco part numbers CAB-RFSW520G for pre-assembled, terminated cable bundles). Pre-assembled cable sets are designed to fit the example racking configuration described in the Rack-Mounting Cisco uBR 3x10 RF Switches with the Cisco uBR10012 CMTS and Cisco uBR10-MC5X20S/U/H Cable Interface Line Cards. Other configurations require custom cables.
Note In Europe only, the Cisco uBR10-MC5X20H card must use quad-shielded cables to connect to the RF Switch (Cisco part numbers CAB-RFSW520TIMM and CAB-RFSW520TPMF for pre-assembled, terminated cable bundles). In all other regions, the Cisco uBR10-MC5X20H card can use dual-shielded or quad-shielded cables.
The Cisco uBR10-MC5X20S and U can use dual-shielded or quad-shielded cables in all regions.
Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
