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Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
OL-1984-06
Chapter 4 Cabling the RF Switch With the Cisco uBR10012 CMTS Cable Interface Line Cards
Connecting the RF Cables (Cisco uBR10-MC5X20S/U/H)
Connecting the RF Cables (Cisco uBR10-MC5X20S/U/H)
This section describes connecting the Cisco uBR-MC5X20S/U/H cable interface line card to the RF
switch. RF cable bundles are used to connect the Cisco uBR-MC5X20S/U/H cable interface line card to
the CMTS, PROTECT, and CABLE PLANT portions of the Cisco uBR 3x10 RF Switches (RFS).
• CMTS—cabled to the designated working line cards.
• PROTECT—cabled to the designated protect line card.
• CABLE PLANT—cabled to the coaxial or fiber-optic transceivers at the cable headend or hub.
Note Two Cisco uBR 3x10 RF Switches are required for this configuration, see Figure 4-2 on page 4-3.
Equipment
• 8 RF cable kits:
CAB-RFSW520TIMM (MC5X20S/U to RFS, dual-shielded, two 10-bundle, one 5-bundle)
or
CAB-RFSW520QTIMM (MC5X20S/U/H to RFS, quad-shielded, five 5-bundle)
• 34 header blocks (for the CMTS, PROTECT, CABLE PLANT sections on the RF switch)
• Flat-blade screwdriver
Note You can use any combination of dual- and quad-shielded cables, depending on personal preference and
which MC5X20 boards you have installed.
In Europe only, the Cisco uBR10-MC5X20H card must use quad-shielded cables. 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.
This procedure assumes that the RF cables are already installed in the universal cable holder (UCH) and
mounted on the Cisco uBR-MC5X20S/U/H cable interface line card. If the cables have not been installed
in the UCH and mounted on the line card, refer to the Cisco uBR-MC5X20S/U/H Cable Interface Line
Card documentation at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/cable/ubr10k/ubr10012/frus/ubrmc520.htm
To connect the header blocks and install the cables on the RF switch, complete the following steps:
Step 1 Install the header blocks on the Cisco uBR 3x10 RF Switches.
a. With the beveled edge of the header block at the top, line up the two alignment pins on the header
block with the two holes corresponding to the RF connector group (CMTS, PROTECT, or CABLE
PLANT) on the RF switch. See Figure 4-15 on page 4-27.
b. Press the header block into place, using equal pressure on both the upper and lower portions of the
header block.
Step 2 Run the cables (behind the cable management bracket if it is installed) up to the CMTS header blocks
on the RF switch.
Step 3 Insert the MCX connectors into the header blocks according to the mapping in the “Mapping the
Working and Protect Cisco uBR10-MC5X20S/U/H Line Cards RF Cables to the RF Switch” section on
page 4-21.
