Cisco RF Switches

Table Of Contents

Cabling Cisco uBR 3x10 RF Switches to Cisco uBR10-MC5X20S/U/H Cable Interface Line Cards in a Cisco uBR10012 CMTS Quick Start Guide

Cisco One-Year Limited Hardware Warranty Terms

Overview

Protection Scheme

RF Cable Assembly Specifications

Universal Cable Holders

Coaxial Cable Bundles

Header Blocks

Connecting RF Cables to the Cisco uBR 3x10 RF Switch

CMTS and PROTECT Cabling

Cable Plant Cabling

Related Documentation

Obtaining Documentation and Submitting a Service Request

Cabling Cisco uBR 3x10 RF Switches to Cisco uBR10-MC5X20S/U/H Cable Interface Line Cards in a Cisco uBR10012 CMTS Quick Start Guide

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Published: February 29, 2012, OL-26634-01

Cisco One-Year Limited Hardware Warranty Terms

There are special terms applicable to your hardware warranty and various services that you can use during the warranty period. Your formal Warranty Statement, including the warranties and license agreements applicable to Cisco software, is available on Cisco.com. Follow these steps to access and download the Cisco Information Packet and your warranty and license agreements from Cisco.com.

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e. Read the document online, or click the PDF icon to download and print the document in Adobe Portable Document Format (PDF).

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3. To read translated and localized warranty information about your product, follow these steps:

a. Enter this part number in the Warranty Document Number field:

78-10747-01C0

b. Select the language in which you would like to view the document.

c. Click Go.

The Cisco warranty page appears.

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You can also contact the Cisco service and support website for assistance:

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Duration of Hardware Warranty

One (1) Year

Replacement, Repair, or Refund Policy for Hardware

Cisco or its service center will use commercially reasonable efforts to ship a replacement part within ten (10) working days after receipt of a Return Materials Authorization (RMA) request. Actual delivery times can vary, depending on the customer location.

Cisco reserves the right to refund the purchase price as its exclusive warranty remedy.

To Receive a Return Materials Authorization (RMA) Number

Contact the company from whom you purchased the product. If you purchased the product directly from Cisco, contact your Cisco Sales and Service Representative.

Complete the information below, and keep it for reference.

Company product purchased from
Company telephone number
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Maintenance contract number

Overview

This document describes the procedures used to connect the cables between the Cisco uBR 3x10 RF Switches and the working and protect Cisco uBR10-MC5X20S/U cable interface line cards installed in a Cisco uBR10012 Cable Modem Termination System (CMTS).

Protection Scheme

The N+1 redundancy protection scheme you select for your system depends largely upon the number of cable interface line cards installed in the Cisco uBR10012 chassis. The 7+1 eight-card redundancy scheme supports redundancy for the cable interface line cards installed in a fully populated Cisco uBR10012 chassis. Other redundancy schemes can be used to support partial cable interface line card populations in a Cisco uBR10012 chassis.

A single Cisco uBR10012 CMTS supports up to eight Cisco uBR10-MC5X20S/U cable interface line cards, each featuring 5 downstream and 20 upstream cable interfaces for a total of 40 downstream and 160 upstream interfaces in the chassis. Two Cisco uBR 3x10 RF Switches are used to connect to the Cisco uBR10012 CMTS, to deploy a redundancy scheme in which one protect cable interface line card supports from one to seven working cable interface line cards in the same chassis.

RF Cable Assembly Specifications

The following sections describe the coaxial cable and header block assemblies required to support N+1 redundancy between the Cisco uBR 3x10 RF Switches and the Cisco CMTS.

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Note Although you may construct and implement your own cabling system according to the specifications outlined here, we recommend using the Cisco N+1 redundancy cabling solution designed specifically for this Cisco CMTS feature (Cisco part numbers CAB-RFSW520QTIMF2, CAB-RFSW520QTIMM2, and CAB-RFSW520QTPMF2 for pre-assembled, terminated cable bundles). Pre-assembled cable sets are designed to fit the racking configuration described in Rack-Mounting Two Cisco uBR 3x10 RF Switches with the Cisco uBR10012 CMTS and Cisco uBR10-MC5X20S/U Cable Interface Line Cards quick start guide. Other configurations require custom cables.

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Note Quad-shield coaxial cable bundles for the Cisco uBR10-MC5X20S/U/H cable interface line card 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.

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Note Prepopulated custom cables for this reference design, or cable components such as header blocks, crimping tools, or connectors, are available from custom cable fabricators such as White Sands Engineering (1-800-JUMPERS).

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Figure 1 shows the cable bundle for Cisco uBR10-MC5X20S/U/H cable interface line card to hybrid fiber-coaxial (HFC) plant that has 25 F connectors attached to one end and three UCH2 units attached to the other end. This cable is 9.84 feet (3 m) long and the part number is CAB-RFSW520QTIMF2.

Figure 1 Cable Bundle with UCH2 Units and F Connectors

1

F Connectors

2

UCH2

Figure 2 shows the cable bundle for Cisco uBR10-MC5X20S/U/H cable interface line card 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

1

RF Switch Header Blocks

2

UCH2

Figure 3 shows the cable bundle for RF switch to HFC plant that has two 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 3 Cable Bundle with RF Switch Header Blocks and F Connectors

1

F Connectors

2

RF Switch Header Blocks

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Note Customers purchasing custom-length quad-shield coaxial cable bundles from third party vendors can purchase spare Universal Cable Holders and spare RF switch header blocks from Cisco.

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Universal Cable Holders

Universal cable holders (UCH) are used to attach the cables to the Cisco uBR10-MC5X20S/U cable interface line cards. Refer to Cisco uBR10-MC5X20S/U Cable Interface Line Card for information about installing cables in the UCH.

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Caution Always use universal cable holders to avoid damage to the connectors on the line cards.

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Coaxial Cable Bundles

The coaxial cable approved for use in the Cisco N+1 cable assembly is Belden YR46940. The cable bundles have either 5 or 10 coaxial cables enclosed in an external sheath. Each cable in the bundle is a different color. (See Figure 4.)

Figure 4 Cable Bundles with Cable Holders and Header Blocks

Cisco cables are color-coded for easy reference and installation. The cable color corresponds to a specific port on the card. The tables include a column for users to define ports and color definitions.

See Table 1 for a list of the cable ports and associated cable color applicable when using MC5X20 dual/qual-shielded cables.

See Table 2 for a list of the cable ports and associated cable color applicable when using MC5X20 legacy 5-color quad-shielded cables.

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Note 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.

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Note Precision miniature video coaxial cables come in various colors, and you can use any cable color combination. However, when you are connecting the Cisco uBR10-MC5X20S/U/H cable interface card to the Cisco RF switch, we recommend that you install the cables in the UCH as listed in Table 1.

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Table 1 MC5X20 Dual/Qual Shielded Cable Ports and Cable Colors 

Universal Cable Holder (1)			Universal Cable Holder (2)			Universal Cable Holder (3)
Line Card Port	Cable Color	RF Switch User Defined	Line Card Port	Cable Color	RF Switch User Defined	Line Card Port	Cable Color	RF Switch User Defined
US1 0	Red		US10	Grey		DS2 0	Red
US1	White		US11	Brown		DS1	White
US2	Blue		US12	Red		DS2	Blue
US3	Green		US13	White		DS3	Green
US4	Yellow		US14	Blue		DS4	Yellow
US5	Violet		US15	Green		—	—
US6	Orange		US16	Yellow		—	—
US7	Black		US17	Violet		—	—
US8	Grey		US18	Orange		—	—
US9	Brown		US19	Black		—	—

1 US = upstream 2 DS = downstream

Table 2 Legacy 5-Color MC5X20 Quad-Shielded Cable Ports and Cable Colors 

Universal Cable Holder (1)			Universal Cable Holder (2)			Universal Cable Holder (3)
Line Card Port	Cable Color	RF Switch User Defined	Line Card Port	Cable Color	RF Switch User Defined	Line Card Port	Cable Color	RF Switch User Defined
US1 0	Red		US10	Red		DS2 0	Red
US1	White		US11	White		DS1	White
US2	Blue		US12	Blue		DS2	Blue
US3	Green		US13	Green		DS3	Green
US4	Yellow		US14	Yellow		DS4	Yellow
US5	Red		US15	Red		—	—
US6	White		US16	White		—	—
US7	Blue		US17	Blue		—	—
US8	Green		US18	Green		—	—
US9	Yellow		US19	Yellow		—	—

1 US = upstream 2 DS = downstream

Header Blocks

Header blocks hold the MCX connectors that attach to the individual coaxial cables that mate to the Cisco uBR 3x10 RF Switch. Be sure that the header block is in the correct orientation before inserting the cables.

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Note The header blocks used in this cabling solution are slightly beveled at the top for easy identification. In addition, the alignment pins on the header blocks are offset, preventing you from accidentally connecting the header block upside down.

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Note An extraction tool is shipped with the Cisco uBR 3x10 RF Switch to remove MCX connectors from the header blocks and universal cable holders, if necessary.

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Figure 5 displays a detailed view of a header block that connects to the RF switches.

Figure 5 Cisco uBR 3x10 RF Switch Header Block

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Note The following instructions describe the connection process for the customized RF cables and the maintenance of the Cisco preconfigured cable bundles.

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Connecting RF Cables to the Cisco uBR 3x10 RF Switch

RF cables are connected to the CMTS, PROTECT, and CABLE PLANT portions of the Cisco uBR 3x10 RF Switch in bundles of RF cables. The cables are terminated with MCX connectors that attach to the header blocks connected to the RF Switch at one of the following locations:

•CMTS—These groups of RF cables connect to cable interface line cards designated as the working line cards.

•PROTECT—These groups of RF cables connect to cable interface line cards designated as the protect line cards.

•CABLE PLANT—These groups of RF cables connect to the splitters and diplexers at the cable headend or hub.

To insert the cables in the header block and connect the header block to the Cisco uBR 3x10 RF Switch, complete the following steps:

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Step 1 Insert the MCX connectors into the header blocks according to the mapping in the "CMTS and PROTECT Cabling" section.

Step 2 Gently pull on the cables to be sure that they are firmly seated in the header blocks.

Step 3 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) section of the RF switch.

Step 4 Press the header block into place, using equal pressure on both the upper and lower portions of the header block.

Figure 6 Cabled Header Block and RF Switch

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Caution To ensure proper installation and avoid poor connections, be sure that the cables are not positioned at too acute an angle.

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Step 5 Use a flat-blade screwdriver to tighten the captive installation screws at both the top and bottom of the header block to prevent accidental disconnections.

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Caution Do not overtighten. Cisco recommends that you tighten the screws to 5 to 7 inch-pounds.

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Tip Alternately, mount the header blocks on the Cisco uBR 3x10 RF Switch first, then insert the MCX connectors. Do not fully tighten the header blocks to the RF switch before gently pulling on the cables to be sure that they are firmly seated.

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CMTS and PROTECT Cabling

This section describes the mapping of RF cables from the working and protect line cards to the Cisco uBR 3x10 RF Switch. Refer to Figure 7 for header block and cable designations as viewed from the cable side of the header blocks.

When you connect RF cables between the RF switch and a cable interface line card installed in a Cisco uBR10012 chassis, ensure that all the RF cables in the bundle attach to interfaces on the same cable interface line card installed in the Cisco uBR10012 chassis. (Refer to Table 3, Table 4, Table 5, and Table 6 for line-card-to-RF-switch-port mapping information.)

Use the following guidelines to map cables between the Cisco uBR 3x10 RF Switch and the Cisco uBR10012 CMTS:

•The cable interface ports labeled A through E and H through L on the header block all must attach to upstream interfaces on the Cisco uBR10012 chassis.

•The cable interface ports labeled F, G, and M are applicable only to downstream connection.

•The cable interface port labeled N on the header block does not attach to anything in the Cisco RF switch. Therefore, it should not be connected to any cable interface on the Cisco uBR10012 CMTS.

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Note This mapping is applicable to both working and protect cable interface line cards when employing N+1 redundancy. The distinction between which cable interface line card serves as a protect line card and which serve as working line cards is determined by whether the header block is plugged into a working (switch side) or protect group of slots on the Cisco uBR 3x10 RF Switch and by the configuration you specify. Refer to the "N+1 Redundancy for the Cisco CMTS" chapter of the Cisco Cable Modem Termination System Feature Guide.

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Tip Install the cable management bracket (optional), before cabling the RF switch.

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Figure 7 Wiring the CMTS and Protect Headers (Cable Plant Headers Shown for Comparison)

Table 3 RF Switch Ports and Line Card Ports for Line Card Slots 8/0 and 8/1 

Working Line Card Slot 8/0—Ports	RF Switch—Port	Working Line Card Slot 8/1—Ports	RF Switch—Port	Cable Color
US0	SW2-1A	US0	SW2-2A	Red
US1	SW2-1B	US1	SW2-2B	White
US2	SW2-1C	US2	SW2-2C	Blue
US3	SW2-1D	US3	SW2-2D	Green
US4	SW2-1H	US4	SW2-2H	Yellow
US5	SW2-1I	US5	SW2-2I	Violet
US6	SW2-1J	US6	SW2-2J	Orange
US7	SW2-1K	US7	SW2-2K	Black
US8	SW2-1E	US8	SW2-2E	Gray
US9	SW2-1L	US9	SW2-2L	Brown
US10	SW1-1E	US10	SW1-2E	Gray
US11	SW1-1L	US11	SW1-2L	Brown
US12	SW1-1A	US12	SW1-2A	Red
US13	SW1-1B	US13	SW1-2B	White
US14	SW1-1C	US14	SW1-2C	Blue
US15	SW1-1D	US15	SW1-2D	Green
US16	SW1-1H	US16	SW1-2H	Yellow
US17	SW1-1I	US17	SW1-2I	Violet
US18	SW1-1J	US18	SW1-2J	Orange
US19	SW1-1K	US19	SW1-2K	Black
DS0	SW2-1F	DS0	SW2-2F	Red
DS1	SW2-1M	DS1	SW2-2M	White
DS2	SW1-1G	DS2	SW1-2G	Blue
DS3	SW1-1F	DS3	SW1-2F	Green
DS4	SW1-1M	DS4	SW1-2M	Yellow

Table 4 RF Switch Ports and Line Card Ports for Line Card Slots 7/0 and 7/1 

Working Line Card Slot 7/0—Ports	RF Switch—Port	Working Line Card Slot 7/1—Ports	RF Switch—Port	Cable Color
US0	SW2-3A	US0	SW2-4A	Red
US1	SW2-3B	US1	SW2-4B	White
US2	SW2-3C	US2	SW2-4C	Blue
US3	SW2-3D	US3	SW2-4D	Green
US4	SW2-3H	US4	SW2-4H	Yellow
US5	SW2-3I	US5	SW2-4I	Violet
US6	SW2-3J	US6	SW2-4J	Orange
US7	SW2-3K	US7	SW2-4K	Black
US8	SW2-3E	US8	SW2-4E	Gray
US9	SW2-3L	US9	SW2-4L	Brown
US10	SW1-3E	US10	SW1-4E	Gray
US11	SW1-3L	US11	SW1-4L	Brown
US12	SW1-3A	US12	SW1-4A	Red
US13	SW1-3B	US13	SW1-4B	White
US14	SW1-3C	US14	SW1-4C	Blue
US15	SW1-3D	US15	SW1-4D	Green
US16	SW1-3H	US16	SW1-4H	Yellow
US17	SW1-3I	US17	SW1-4I	Violet
US18	SW1-3J	US18	SW1-4J	Orange
US19	SW1-3K	US19	SW1-4K	Black
DS0	SW2-3F	DS0	SW2-4F	Red
DS1	SW2-3M	DS1	SW2-4M	White
DS2	SW1-3G	DS2	SW1-4G	Blue
DS3	SW1-3F	DS3	SW1-4F	Green
DS4	SW1-3M	DS4	SW1-4M	Yellow

Table 5 RF Switch Ports and Line Card Ports for Line Card Slots 6/0 and 6/1 

Working Line Card Slot 6/0—Ports	RF Switch—Port	Working Line Card Slot 6/1—Ports	RF Switch—Port	Cable Color
US0	SW2-5A	US0	SW2-6A	Red
US1	SW2-5B	US1	SW2-6B	White
US2	SW2-5C	US2	SW2-6C	Blue
US3	SW2-5D	US3	SW2-6D	Green
US4	SW2-5H	US4	SW2-6H	Yellow
US5	SW2-5I	US5	SW2-6I	Violet
US6	SW2-5J	US6	SW2-6J	Orange
US7	SW2-5K	US7	SW2-6K	Black
US8	SW2-5E	US8	SW2-6E	Gray
US9	SW2-5L	US9	SW2-6L	Brown
US10	SW1-5E	US10	SW1-6E	Gray
US11	SW1-5L	US11	SW1-6L	Brown
US12	SW1-5A	US12	SW1-6A	Red
US13	SW1-5B	US13	SW1-6B	White
US14	SW1-5C	US14	SW1-6C	Blue
US15	SW1-5D	US15	SW1-6D	Green
US16	SW1-5H	US16	SW1-6H	Yellow
US17	SW1-5I	US17	SW1-6I	Violet
US18	SW1-5J	US18	SW1-6J	Orange
US19	SW1-5K	US19	SW1-6K	Black
DS0	SW2-5F	DS0	SW2-6F	Red
DS1	SW2-5M	DS1	SW2-6M	White
DS2	SW1-5G	DS2	SW1-6G	Blue
DS3	SW1-5F	DS3	SW1-6F	Green
DS4	SW1-5M	DS4	SW1-6M	Yellow

Table 6 RF Switch Ports and Line Card Ports for Line Card Slots 5/0 and 5/1 

Working Line Card Slot 5/0—Ports	RF Switch—Port	Protect Line Card Slot 5/1—Ports	RF Switch—Port	Cable Color
US0	SW2-7A	US0	SW2-P1A	Red
US1	SW2-7B	US1	SW2-P1B	White
US2	SW2-7C	US2	SW2-P1C	Blue
US3	SW2-7D	US3	SW2-P1D	Green
US4	SW2-7H	US4	SW2-P1H	Yellow
US5	SW2-7I	US5	SW2-P1I	Violet
US6	SW2-7J	US6	SW2-P1J	Orange
US7	SW2-7K	US7	SW2-P1K	Black
US8	SW2-7E	US8	SW2-P1E	Gray
US9	SW2-7L	US9	SW2-P1L	Brown
US10	SW1-7E	US10	SW1-P1E	Gray
US11	SW1-7L	US11	SW1-P1L	Brown
US12	SW1-7A	US12	SW1-P1A	Red
US13	SW1-7B	US13	SW1-P1B	White
US14	SW1-7C	US14	SW1-P1C	Blue
US15	SW1-7D	US15	SW1-P1D	Green
US16	SW1-7H	US16	SW1-P1H	Yellow
US17	SW1-7I	US17	SW1-P1I	Violet
US18	SW1-7J	US18	SW1-P1J	Orange
US19	SW1-7K	US19	SW1-P1K	Black
DS0	SW2-7F	DS0	SW2-P1F	Red
DS1	SW2-7M	DS1	SW2-P1M	White
DS2	SW1-7G	DS2	SW1-P1G	Blue
DS3	SW1-7F	DS3	SW1-P1F	Green
DS4	SW1-7M	DS4	SW1-P1M	Yellow

Cable Plant Cabling

CABLE PLANT header blocks are wired in the reverse sequence of the CMTS and Protect header blocks (see Figure 8). Use the same connection methods as described in the "Connecting RF Cables to the Cisco uBR 3x10 RF Switch" section.

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Note CABLE PLANT slots on the Cisco uBR 3x10 RF Switch are numbered in reverse sequence from CMTS and PROTECT. Slot number one is on the right. Refer to Figure 8 for header block and cable designations as viewed from the cable side of the header blocks.

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Figure 8 Wiring the Cable Plant Cable Headers (CMTS/Protect Headers Shown for Comparison)

Related Documentation

•Cisco uBR 3x10 RF Switch Hardware Installation and Cabling Guide

http://www.cisco.com/en/US/docs/cable/rfswitch/ubr3x10/installation/guide/icg.html

•Installing the Cisco uBR10-MC5X20S/U Cable Interface Line Card

http://www.cisco.com/en/US/docs/interfaces_modules/cable/broadband_processing_engines/ubr10_mc5x20s_u_h/quick/start/520u_qsg.html

•Regulatory Compliance and Safety Information for the Cisco RF Switch

http://www.cisco.com/en/US/docs/cable/rfswitch/ubr3x10/regulatory/compliance/swrcsi03.html

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What's New in Cisco Product Documentation as an RSS feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service. Cisco currently supports RSS Version 2.0.

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This document is to be used in conjunction with the documents listed in the "Related Documentation" section.

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