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Cisco RF Switches

Cabling the Cisco uBR 3x10 RF Switch

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Cabling the Cisco uBR 3x10 RF Switch Quick Start Guide

Table Of Contents

Cabling the Cisco uBR 3x10 RF Switch Quick Start Guide

Contents

Objective

Audience

Overview

Cables and Equipment

Cable Kit Part Numbers

Other Tools and Equipment

Installing the Header Blocks on the Cisco uBR 3x10 RF Switch

Cabling the Cisco uBR 3x10 RF Switch with Cisco uBR-MC5X20S/U/H Cable Interface Line Cards in the Cisco uBR10012 Router

Cabling the Working and Protect Line Cards to the RF Switch

Cabling the RF Switch Output (CABLE PLANT to HUB)

Powering On the RF Switch

Troubleshooting

Obtaining Documentation and Submitting a Service Request


Cabling the Cisco uBR 3x10 RF Switch Quick Start Guide


Contents

Objective

Audience

Overview

Cables and Equipment

Installing the Header Blocks on the Cisco uBR 3x10 RF Switch

Cabling the Cisco uBR 3x10 RF Switch with Cisco uBR-MC5X20S/U/H Cable Interface Line Cards in the Cisco uBR10012 Router

Powering On the RF Switch

Troubleshooting

Obtaining Documentation and Submitting a Service Request

Objective

This document includes procedures for cabling the Cisco 3X10 RF Switch. This document also includes technical specifications and troubleshooting information.

Audience

This document is intended for field service engineers who are familiar with Cisco products and headend cable installation procedures.


Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030.

Overview

The RF switch is designed to work with both the Cisco uBR7246VXR cable modem termination system (CMTS) and the Cisco uBR10012 CMTS in a cable headend or hub to provide N+1 redundancy for applications such as Voice over IP (VoIP). The cabling scenarios presented here are designed to help you cable the cards to the RF switch and upconverter (when used). Refer to the specific card and CMTS information to help you cable the Cisco uBR 3x10 RF Switch to cable interface line cards.


Tip The CMTS, PROTECT, and CABLE PLANT MCX connections are accessed from the rear of the RF switch chassis.


Figure 1 Rear View of the Cisco uBR-3x10 RF Switch

1

Mounting brackets

3

PROTECT MCX connector location

2

CMTS (working) MCX connector location

4

CABLE PLANT MCX connector location


For information about installing the Cisco uBR 3x10 RF Switch in a telco rack, see the Rack-Mounting the Cisco uBR 3x10 RF Switch with the Cisco uBR10012 CMTS - Quick Start Guide, at the following URL:

http://www.cisco.com/en/US/docs/cable/rfswitch/ubr3x10/quick/start/ub10swrk.html

For warranty information, see the Cisco uBR 3x10 RF Switch Roadmap documentation, at the following URL:

http://www.cisco.com/en/US/docs/cable/rfswitch/ubr3x10/roadmap/rdmp310.html

For information about the Vecima upconverter, go to the following URL:

http://www.vecima.com/

Cables and Equipment

The cables approved for use in this Cisco N+1 redundancy solution, are Mini Precision RG59 95 percent tinned copper braid with 100 percent foil shield. This cable is SDI rated with a 1 MHz to 3 GHz rating.

Cable Kit Part Numbers

Cable bundle for RF card to HFC plant: 3 UCH2 units attached to one end and F connectors attached to the other end, 9.84 feet (3 m) long—Part number CAB-RFSW520QTIMF2=

Cable bundle for RF card to RF switch: 3 UCH2 units attached to one end and 2 RF switch header blocks attached to the other end, 3.2 feet (1 m) long—Part number CAB-RFSW520QTIMM2=

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=

Universal Cable Holder for MCX connectors, qty 3 pcs—Part number CAB-520-MULT-UCH2

RF Switch header blocks for MCX connectors, qty 4 pcs—Part number CAB-RFSW-MULT-HB


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.


The cable bundle for RF card to HFC plant has five 5-bundle MCX connectors attached to three UCH2 units on one end, and F connectors attached to the other end. The cable bundle is 9.84 feet (3 m) long and is referred to by the Cisco part number CAB-RFSW520QTIMF2.

Figure 2 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 2 Cable Bundle with UCH2 Units and F Connectors

1

F Connectors

2

UCH2


Figure 3 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 3 Cable Bundle with UCH2 Units and RF Switch Header Blocks

1

RF Switch Header Blocks

2

UCH2


Figure 4 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 4 Cable Bundle with RF Switch Header Blocks and F Connectors

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 Universal Cable Holders and spare RF switch header blocks from Cisco.



Note We recommend that you tighten the F-connectors to a value between 10 (recommended) and 15 (maximum) inch-pounds (1.1298 and 1.7339 Nm).


8 RF cable kits: CAB-RFSW520QTIMM2 (RF card to RFS, quad-shielded, 3 UCH2 units attached to one end and two RF switch header blocks attached to the other end, five 5-bundle, 3.2 feet (1 m) long)

Flat-blade screwdriver

T-10 Torx screwdriver for UCH cable installation

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 legacy 5-color quad-shielded cables.

See Table 2 for a list of the cable ports and associated cable color applicable when using 10-color dual/qual-shielded cables.

Table 1 MC5X20 Legacy 5-color 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


Table 2 MC5X20 Ten-color Dual/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

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


Other Tools and Equipment

Custom cables or cable components such as header blocks, crimping tools, or connectors are available from custom cable fabricators such as WhiteSands Engineering (telephone: 1 800 586 7377), or at the following URL:

http://www.whitesandsengineering.com/

WhiteSands Part Numbers:

MCXHEADERBK—Header blocks

REMTOOL- MCX removal tool for MCX or RF switch header block

MCXFP—MCX connectors for dual-shielded cables

MCXFPQ MCX connectors for quad-shielded cables

MCXF/FF—Adapters, MCX female connectors to F female connectors

ASFP—F-connectors for dual-shielded

ASFPQ - F connectors for quad-shielded

ACT-483—Crimper for F-connectors and MCX connectors

CPT-7538-125—Stripper for MCX connector

CPT-7538Q—Stripper for F-connectors (quad-shielded)

CPT-7538—Stripper for F connectors (dual-shielded)

CPT-7538-200Q—Stripper for MCX connector (quad-shielded)

Installing the Header Blocks on the Cisco uBR 3x10 RF Switch

The RF cables are connected to the CMTS, PROTECT, and CABLE PLANT portions of the Cisco uBR 3x10 RF Switch using the header blocks. Header blocks are installed on the RF switch at the following locations:

CMTS—RF cables connect to working cable interface line cards and to IF-to-RF upconverters.

PROTECT—RF cables connect to protecting cable interface line cards.

CABLE PLANT—RF cables connect to the cable headend or hub.

Equipment

Header blocks

Flat-blade screwdriver


Tip The number of header blocks depends on the number of RF switches and line cards used. For example, if you are using one RF Switch and eight line cards, you will need 18 header blocks.



Step 1 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 under the CMTS, PROTECT, or CABLE PLANT section of the Cisco uBR 3x10 RF Switch.

Step 2 Press the header block into place, using equal pressure on both the upper and lower portions of the header block.

Step 3 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.


Note Tighten the header blocks to the Cisco uBR 3x10 RF Switch only after gently pulling on the cables to be sure that they are firmly seated in the header block.



Caution Do not overtighten the captive screws. We recommend that you tighten the screws to 5 to 7 inch-pounds
(0.5647 to 0.7909 Nm)


Figure 5 Header Block Description

Cabling the Cisco uBR 3x10 RF Switch with Cisco uBR-MC5X20S/U/H Cable Interface Line Cards in the Cisco uBR10012 Router

The Cisco uBR10012 router supports up to eight Cisco uBR10-MC5X20S/U/H cable interface line cards, each featuring five downstream and twenty upstream cable interfaces for a total of 40 downstream and 160 upstream interfaces in the chassis. Two Cisco uBR 3x10 RF Switchs are used in this configuration, allowing you to employ a redundancy scheme in which one protect cable interface line card (one of the eight, usually 5/1) supports from one to seven working line cards in the same chassis.


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



Note If you are replacing a Cisco uBR10-MC5X20S or U card with a Cisco uBR10-MC5X20U or H card, you must reconfigure the card.


Figure 6 Cabling the Cisco uBR 3x10 RF Switch with the Cisco uBR10-MC5X20S/U/H in the Cisco uBR10012 CMTS

Cabling the Working and Protect Line Cards to the RF Switch

This section describes cabling the working and protect line cards to the RF switch. This procedure assumes that the RF cables are already installed in the universal cable holder 1 or 2 (UCH1 or UCH2) and mounted on the Cisco uBR-MC5X20S/U/H cable interface line card. If the cables have not been installed in the UCH1 or UCH2 and mounted on the line card, refer to the Cisco uBR10-MC5X20S/U/H Cable Interface Line Card Hardware Installation Guide documentation at the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/cable/broadband_processing_engines/ubr10_mc5x20s_u_h/installation/guide/ubrmc520.html


Note The UCH1 or UCH2 is supplied with the Cisco uBR10-MC5X20 S/U/H cable interface line card.



Tip You can cable the header blocks first, then mount them on the RF switch. 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.


Equipment

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 RF switches. See the "Installing the Header Blocks on the Cisco uBR 3x10 RF Switch" section.

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. See Figure 6.

For MCX cabling locations, refer to:

Table 3 for slot 8/0 and 8/1 working line card RF switch connections.

Table 4 for slot 7/0 and 7/1 working line card RF switch connections.

Table 5 for slot 6/0 and 6/1 working line card RF switch connections.

Table 6 for slot 5/0 and 5/1 working and protect line card RF switch connections.

Step 4 Gently pull on the cables to be sure that they are firmly seated in the header blocks.


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

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. Do not over-tighten the captive screws.


Caution Do not overtighten the captive screws. We recommend that you tighten the captive screws to 5 to 7 inch-pounds (0.5647 to 0.7909 Nm).


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

Ports
Cable Color
Working Line Card Slot 8/0—Ports
RF Switch—Port
a
Working Line Card Slot 8/1—Ports
RF Switch—Port
a
To upstream 0-9

Red

US0

RFS-2-1A

 

US0

RFS2-2A

 

White

US1

RFS-2-1B

 

US1

RFS-2-2B

 

Blue

US2

RFS-2-1C

 

US2

RFS-2-2C

 

Green

US3

RFS-2-1D

 

US3

RFS-2-2D

 

Yellow

US4

RFS-2-1H

 

US4

RFS-2-2H

 

Violet

US5

RFS-2-1I

 

US5

RFS-2-2I

 

Orange

US6

RFS-2-1J

 

US6

RFS-2-2J

 

Black

US7

RFS-2-1K

 

US7

RFS-2-2K

 

Gray

US8

RFS-2-1E

 

US8

RFS-2-2E

 

Brown

US9

RFS-2-1L

 

US9

RFS-2-2L

 
 
To upstream 10-19

Gray

US10

RFS-1-1E

 

US10

RFS-1-2E

 

Brown

US11

RFS-1-1L

 

US11

RFS-1-2L

 

Red

US12

RFS-1-1A

 

US12

RFS-1-2A

 

White

US13

RFS-1-1B

 

US13

RFS-1-2B

 

Blue

US14

RFS-1-1C

 

US14

RFS-1-2C

 

Green

US15

RFS-1-1D

 

US15

RFS-1-2D

 

Yellow

US16

RFS-1-1H

 

US16

RFS-1-2H

 

Violet

US17

RFS-1-1I

 

US17

RFS-1-2I

 

Orange

US18

RFS-1-1J

 

US18

RFS-1-2J

 

Black

US19

RFS-1-1K

 

US19

RFS-1-2K

 
 
To downstream 0-4

Red

DS0

RFS-2-1F

 

DS0

RFS-2-2F

 

White

DS1

RFS-2-1M

 

DS1

RFS-2-2M

 

Blue

DS2

RFS-1-1G

 

DS2

RFS-1-2G

 

Green

DS3

RFS-1-1F

 

DS3

RFS-1-2F

 

Yellow

DS4

RFS-1-1M

 

DS4

RFS-1-2M

 

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

Ports
Cable Color
Working Line Card Slot 7/0—Ports
RF Switch—Port
a
Working Line Card Slot 7/1—Ports
RF Switch—Port
a
To upstream 0-9

Red

US0

RFS-2-3A

 

US0

RFS-2-4A

 

White

US1

RFS-2-3B

 

US1

RFS-2-4B

 

Blue

US2

RFS-2-3C

 

US2

RFS-2-4C

 

Green

US3

RFS-2-3D

 

US3

RFS-2-4D

 

Yellow

US4

RFS-2-3H

 

US4

RFS-2-4H

 

Violet

US5

RFS-2-3I

 

US5

RFS-2-4I

 

Orange

US6

RFS-2-3J

 

US6

RFS-2-4J

 

Black

US7

RFS-2-3K

 

US7

RFS-2-4K

 

Gray

US8

RFS-2-3E

 

US8

RFS-2-4E

 

Brown

US9

RFS-2-3L

 

US9

RFS-2-4L

 
 
To upstream 10-19

Gray

US10

RFS-1-3E

 

US10

RFS-1-4E

 

Brown

US11

RFS-1-3L

 

US11

RFS-1-4L

 

Red

US12

RFS-1-3A

 

US12

RFS-1-4A

 

White

US13

RFS-1-3B

 

US13

RFS-1-4B

 

Blue

US14

RFS-1-3C

 

US14

RFS-1-4C

 

Green

US15

RFS-1-3D

 

US15

RFS-1-4D

 

Yellow

US16

RFS-1-3H

 

US16

RFS-1-4H

 

Violet

US17

RFS-1-3I

 

US17

RFS-1-4I

 

Orange

US18

RFS-1-3J

 

US18

RFS-1-4J

 

Black

US19

RFS-1-3K

 

US19

RFS-1-4K

 
 
To downstream 0-4

Red

DS0

RFS-2-3F

 

DS0

RFS-2-4F

 

White

DS1

RFS-2-3M

 

DS1

RFS-2-4M

 

Blue

DS2

RFS-1-3G

 

DS2

RFS-1-4G

 

Green

DS3

RFS-1-3F

 

DS3

RFS-1-4F

 

Yellow

DS4

RFS-1-3M

 

DS4

RFS-1-4M

 

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

Ports
Cable Color
Working Line Card Slot 6/0—Ports
RF Switch—Port
a
Working Line Card Slot 6/1—Ports
RF Switch—Port
a
To upstream 0-9

Red

US0

RFS-2-5A

 

US0

RFS-2-6A

 

White

US1

RFS-2-5B

 

US1

RFS-2-6B

 

Blue

US2

RFS-2-5C

 

US2

RFS-2-6C

 

Green

US3

RFS-2-5D

 

US3

RFS-2-6D

 

Yellow

US4

RFS-2-5H

 

US4

RFS-2-6H

 

Violet

US5

RFS-2-5I

 

US5

RFS-2-6I

 

Orange

US6

RFS-2-5J

 

US6

RFS-2-6J

 

Black

US7

RFS-2-5K

 

US7

RFS-2-6K

 

Gray

US8

RFS-2-5E

 

US8

RFS-2-6E

 

Brown

US9

RFS-2-5L

 

US9

RFS-2-6L

 
 
To upstream 10-19

Gray

US10

RFS-1-5E

 

US10

RFS-1-6E

 

Brown

US11

RFS-1-5L

 

US11

RFS-1-6L

 

Red

US12

RFS-1-5A

 

US12

RFS-1-6A

 

White

US13

RFS-1-5B

 

US13

RFS-1-6B

 

Blue

US14

RFS-1-5C

 

US14

RFS-1-6C

 

Green

US15

RFS-1-5D

 

US15

RFS-1-6D

 

Yellow

US16

RFS-1-5H

 

US16

RFS-1-6H

 

Violet

US17

RFS-1-5I

 

US17

RFS-1-6I

 

Orange

US18

RFS-1-5J

 

US18

RFS-1-6J

 

Black

US19

RFS-1-5K

 

US19

RFS-1-6K

 
 
To downstream 0-4

Red

DS0

RFS-2-5F

 

DS0

RFS-2-6F

 

White

DS1

RFS-2-5M

 

DS1

RFS-2-6M

 

Blue

DS2

RFS-1-5G

 

DS2

RFS-1-6G

 

Green

DS3

RFS-1-5F

 

DS3

RFS-1-6F

 

Yellow

DS4

RFS-1-5M

 

DS4

RFS-1-6M

 

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

Ports
Cable Color
Working Line Card Slot 5/0—Ports
RF Switch—Port
a
Protect Line Card Slot 5/1—Ports
RF Switch—Port
a
To upstream 0-9

Red

US0

RFS-2-7A

 

US0

RFS-2-P1A

 

White

US1

RFS-2-7B

 

US1

RFS-2-P1B

 

Blue

US2

RFS-2-7C

 

US2

RFS-2-P1C

 

Green

US3

RFS-2-7D

 

US3

RFS-2-P1D

 

Yellow

US4

RFS-2-7H

 

US4

RFS-2-P1H

 

Violet

US5

RFS-2-7I

 

US5

RFS-2-P1I

 

Orange

US6

RFS-2-7J

 

US6

RFS-2-P1J

 

Black

US7

RFS-2-7K

 

US7

RFS-2-P1K

 

Gray

US8

RFS-2-7E

 

US8

RFS-2-P1E

 

Brown

US9

RFS-2-7L

 

US9

RFS-2-P1L

 
 
To upstream 10-19

Gray

US10

RFS-1-7E

 

US10

RFS-1-P1E

 

Brown

US11

RFS-1-7L

 

US11

RFS-1-P1L

 

Red

US12

RFS-1-7A

 

US12

RFS-1-P1A

 

White

US13

RFS-1-7B

 

US13

RFS-1-P1B

 

Blue

US14

RFS-1-7C

 

US14

RFS-1-P1C

 

Green

US15

RFS-1-7D

 

US15

RFS-1-P1D

 

Yellow

US16

RFS-1-7H

 

US16

RFS-1-P1H

 

Violet

US17

RFS-1-7I

 

US17

RFS-1-P1I

 

Orange

US18

RFS-1-7J

 

US18

RFS-1-P1J

 

Black

US19

RFS-1-7K

 

US19

RFS-1-P1K

 
 
To downstream 0-4

Red

DS0

RFS-2-7F

 

DS0

RFS-2-P1F

 

White

DS1

RFS-2-7M

 

DS1

RFS-2-P1M

 

Blue

DS2

RFS-1-7G

 

DS2

RFS-1-P1G

 

Green

DS3

RFS-1-7F

 

DS3

RFS-1-P1F

 

Yellow

DS4

RFS-1-7M

 

DS4

RFS-1-P1M

 

Cabling the RF Switch Output (CABLE PLANT to HUB)

This section describes cabling the RF switch to the HUB or cable plant.


Note CABLE PLANT slots on the Cisco uBR 3x10 RF Switch are numbered in reverse sequence to the CMTS and PROTECT slots. Slot number one is on the far right. Refer to Figure 7 for header block and cable designations as viewed from the cable side of the header blocks.


Equipment

7 RF cable bundle kits, CAB-RFSW520QTPMF2 (3-m, RFS to cable plant, two RF switch header blocks attached to one end and F connectors attached to the other end, two 10-bundle, one 5-bundle)

To cable the output connections, complete the following steps. See Figure 7.


Step 1 Install the output cables in the header blocks. Refer to the "Equipment" section for MCX connector installation instructions.


Note The output cables (CABLE PLANT) on the Cisco uBR 3x10 RF Switches are cabled in the reverse order of the input cables (CMTS).


Step 2 Run the output cables (H-A) from header blocks to splitters, US laser receivers, or the low side of the diplex filters.

Step 3 Run the output cables (M, F, G) to the splitters and combiners, DS laser transmitters, or the high side of the diplex filters.


Note N is not used.



Figure 7 Cabling the Cable Plant Headers (CMTS/Protect Headers Shown for Comparison)

Powering On the RF Switch

Perform this procedure only after installing and cabling the RF switch.

To power on the RF switch, complete the following steps:


Step 1 Check that the cables connecting the cable interface line cards in the Cisco uBR7246VXR to the Cisco uBR 3x10 RF Switch are in place.

Step 2 Verify that the power cables are properly connected and secured.

a. The AC-input power cable is connected and secured with the cable-retention clip.

b. The AC power cord is connected to the AC power source.

or

a. The DC-input leads (+48 and -48 DC) are connected and secured in the strain-relief on the power supply faceplate.

b. The DC ground wire is securely connected to the ground location (rack).

c. The DC leads are connected to the DC power source.

Step 3 Place the power switch on the power supply in either the AC or DC position, depending on which type of power source is connected to your Cisco RF Switch. The green LED on the power supply goes on.

Step 4 During the boot process, monitor the Cisco uBR 3x10 RF Switch system initialization and LED behavior for any errors or failures.


Troubleshooting

This section covers troubleshooting the cable installation. For information about troubleshooting the Cisco uBR 3x10 RF Switch, refer to the Cisco uBR 3x10 RF Switch Installation and Cabling Guide at the following URL:

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

1. Verify that the cards are securely installed in both CMTS and RF switch chassis. We recommend that you tighten the captive screws on the cards to 5 to 7 inch-pounds (0.5647 to 0.7909 Nm).

2. Verify that the MCX connectors are securely installed in the header blocks and that the header blocks are securely installed on the RF switch. We recommend that you tighten the captive screws on the header blocks to 5 to 7 inch-pounds
(0.5647 to 0.7909 Nm).

3. If you are using Cisco uBR5x20S/U/H line cards, verify that the cables are secure in the UCH and that the UCH is securely installed on the line card. Tighten the captive screws to 5 to 7 inch-pounds (0.5647 to 0.7909 Nm).

4. Make sure that the cables are not bent or positioned at too acute an angle.

5. Make sure that none of the connections between the cables and the connectors are broken or damaged. Replace the connector if necessary.

6. Check the STATUS LEDs on the RF switch modules. See Table 7.

Table 7 Switch Board LED Descriptions

LED Name
Color
Description

Protect 1

Green/Yellow

Idle/protect

Protect 2

Green/ Yellow

Idle/protect

Error 1

Off/Continuous Yellow

No problem/communications failure or switch position failure

Error 2

Off/Continuous Yellow

No problem/communications failure or switch position failure


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 a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.