Table Of Contents
Rack-Mounting the Cisco uBR 3x10 RF Switch with the
Cisco uBR10012 CMTS
Overview
Sample Configuration
Required Equipments
Tools and Equipments
Cables Used with the Configuration
Attaching the Brackets
Rack-Mounting the Switch
Grounding the Chassis
Attaching the Cable Management Bracket
Technical Specifications
Related Documentation
Quick Start Guide
Rack-Mounting the Cisco uBR 3x10 RF Switch with the
Cisco uBR10012 CMTS
Revised: October 15, 2010, OL-23775-01
1 Overview
This document provides basic instructions for mounting a Cisco uBR 3x10 RF Switch in a 4-post equipment rack with the Cisco uBR0012 CMTS.
Before proceeding with the installation, review the safety information in the Cisco RF Switch Regulatory Compliance and Safety Information.
Sample Configuration
The following illustration (see Figure 1) shows a sample configuration using the Cisco uBR3x10 RF Switch with a Cisco uBR10012 CMTS.
Figure 1 Cisco RF Switches Installed with a Cisco uBR10012 CMTS
2 Required Equipments
The following equipments are required for mounting the Cisco uBR 3x10 RF Switch in a standard 19-inch-wide 4-post equipment rack.
Tip 
To prevent overheating, install the RF Switch in an area that is properly ventilated or air conditioned.
Note The rack-mount brackets that come in the accessory kit cannot be used with other racks, such as 23-inch telco racks.
Tools and Equipments
•Number 2 Phillips screwdriver
•7/16-inch flat-blade screwdriver
•Eight 1/32 x 3/8 slotted screws
•Two M5 hex-head screws
•Number 4 AWG ground wire
•Ground lug
•Heat-shrink tubing
•Cable management bracket
•Six M5 x 8-mm Phillips countersunk screws
•Two rack-mount brackets
Cables Used with the Configuration
•Cable bundle for RF card to RF Switch:
–For Cisco uBR10-MC5X20S/U/H and Cisco UBR-MC20X20V line cards—Three UCH2 units attached to one end and two RF Switch header blocks attached to the other end, 3.2 feet (1 m) long—Part number CAB-RFSW520QTIMM2
–For Cisco uBR-MC3GX60V—Two UCH2 units attached to one end and two RF Switch header blocks attached to the other end, 3.2 feet (1 m) long—Part number CABRFSW3G60QTIMM2
•Cable bundle for RF Switch to HFC plant: 2 RF Switch header blocks attached to one end and F connectors attached to the other end, 9.84 feet (3 m) long—Part number CAB-RFSW520QTPMF2 (when the CMTS has Cisco uBR10-MC5X20S/U/H and Cisco UBR-MC20X20V cable interface line cards) or CABRFSW3G60QTPMF2 (when the CMTS has Cisco uBR-MC3GX60V cable interface line card)
•Universal Cable Holder for MCX connectors—Part number CAB-520-UCH2
•RF Switch header blocks for MCX connectors—Part number CAB-RFSW-MULT-HB
Note Quad-shield coaxial cable bundles for the line cards can be purchased from Cisco with the Universal Cable Holders (UCH) already connected to the coaxial cable bundles. Alternatively, custom-length quad-shield coaxial cable bundles can be purchased from third-party vendors, with the UCH either connected to the cable bundles or provided as seperate components.
Figure 2 shows the cable bundle for the Cisco uBR10-MC5X20S/U/H and Cisco UBR-MC20X20V cable interface line cards to RF Switch that has three UCH2 units attached to one end and two RF Switch header blocks attached to the other end. This cable is 3.2 feet (1 m) long and the part number is CAB-RFSW520QTIMM2.
Figure 2 Cable Bundle with UCH2 Units and RF Switch Header Blocks (for Cisco uBR10-MC5X20S/U/H and Cisco UBR-MC20X20V line cards)
1
|
RF Switch Header Blocks
|
2
|
UCH2
|
Figure 3 shows the cable bundle for the Cisco uBR-MC3GX60V cable interface line card to RF Switch that has two UCH2 units attached to one end and two RF Switch header blocks attached to the other end. This cable is 3.2 feet (1 m) long and the part number is CABRFSW3G60QTIMM2.
Figure 3 Cable Bundle with UCH2 Units and RF Switch Header Blocks (for Cisco uBR-MC3GX60V line cards)
1
|
RF Switch Header Blocks
|
2
|
UCH2
|
Figure 4 shows the cable bundle for RF Switch to HFC plant that has 2 RF Switch header blocks attached to one end and 25 F connectors attached to the other end. This cable is 9.84 feet (3 m) long and the part number is CAB-RFSW520QTPMF2.
Figure 4 Cable Bundle with RF Switch Header Blocks and F Connectors
1
|
F Connectors
|
2
|
RF Switch Header Blocks
|
Figure 5 shows the cable bundle for RF Switch to HFC plant that has 2 RF Switch header blocks attached to one end and 20 F connectors attached to the other end. This cable is 9.84 feet (3 m) long and the part number is CABRFSW3G60TPMF2. This cable bundle is used only when the Cisco CMTS is loaded with Cisco uBR-MC3GX60V cable interface line cards.
Figure 5 Cable Bundle with RF Switch Header Blocks and F Connectors (for Cisco uBR-MC3GX60V line cards)
1
|
F Connectors
|
2
|
RF Switch Header Blocks
|
Note Customers purchasing custom-length quad-shield coaxial cable bundles from third-party vendors can purchase spare UCHs and spare RF Switch header blocks from Cisco.
Note For detailed installation and cabling instructions, refer to the Cisco uBR 3x10 RF Switch Hardware Installation and Cabling Guide.
3 Attaching the Brackets
To attach the brackets, perform the following steps:
Step 1 Locate the threaded holes at the front of the RF Switch chassis (both sides).
Step 2 Align the first rack-mount bracket with the threaded holes in the left-front side of the chassis. See Figure 6.
Step 3 Thread the M5 x 8 mm Phillips screws through the rack-mount bracket and into the side of the chassis.
Step 4 Use the # 2 Phillips screwdriver to tighten the screws.
Step 5 Repeat Step 1 through Step 4 for the other bracket.
Figure 6 Front-Mounted Brackets
4 Rack-Mounting the Switch
Caution Two people should perform this installation procedure.
Step 1 Ensure that all the modules are secure in the chassis.
Step 2 Position the chassis so that the rear panel is facing the same way as the connectors on the cards. See Figure 1.
Step 3 Slide the chassis into the rack. Use the illustrations to determine where you attach the chassis to the rack. See Figure 1.
Step 4 While keeping the brackets flush against the posts or mounting strips, position the chassis so that the holes in the brackets are aligned with those in the mounting strips.
Note Use all four screws to fasten the two rack-mount brackets to the rack posts, because the brackets support the weight of the chassis, which is 36.6 lbs (16.6 kg).
Step 5 Insert all four 1/32 x 3/8 slotted screws (two on each side) through the brackets and into the mounting strip.
Tip Insert the bottom screws first.
Step 6 Tighten all the screws.
5 Grounding the Chassis
Caution Before connecting power and turning on the RF Switch, you must provide an adequate earth ground connection.
Step 1 Locate the ground lug holes on the left-side rear of the chassis. See Figure 7.
Step 2 Using number 4 AWG wire (recommended), insert the wire into the ground lug.
Step 3 Cover any exposed wire with heat-shrink tubing.
Step 4 Use the two M5 hex-head screws to attach the grounding lug to the chassis.
Step 5 Attach the wire to an appropriate earth ground location.
Figure 7 Grounding Lug Location
Attaching the Cable Management Bracket
A cable management bracket is included in the shipping container. We recommend using this bracket to ensure proper airflow in the chassis.
Step 1 Locate the threaded holes in the right-rear and left-rear side of the Cisco uBR10012 chassis. See Figure 1.
Step 2 Align the cable-management bracket (see Figure 8) with the threaded holes.
Step 3 Thread the countersunk screws through the bracket and into the chassis.
Step 4 Tighten the screws.
Figure 8 Cable-Management Bracket
6 Technical Specifications
Table 1 Part Numbers and Specifications
Description
|
Part Num/Specification
|
RF Switch (3x10)
|
UBR-RFSW-3X10
|
Weight
|
36.6 lbs (16.6 kg)
|
Dimensions
(w x d x h)
|
19 x 15.5 x 5.25 inches
(482 x 394 x 133 mm)(
|
Operating
temperature
|
32 to 104°F (0 to +40°C)
|
Storage temperature
|
-38 to 149°F (-40 to +70°C)
|
Power requirement
|
AC
|
100 to 240 VAC, 50-60 Hz.
|
DC
|
-48/-60 VDC
|
Requires Cisco IOS Release 12.2(15)BC2 or a later release.
|
7 Related Documentation
•Cisco uBR 3x10 RF Switch Hardware Installation and Cabling Guide
http://www.cisco.com/en/US/products/hw/cable/ps2929/prod_installation_guides_list.html
•Cisco RF Switch Regulatory Compliance and Safety Information
http://www.cisco.com/en/US/docs/cable/rfswitch/ubr3x10/regulatory/compliance/swrcsi03.html
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