Cabling the Cisco uBR10-MC5X20S/U/H Cable Interface Line Card with UCH2 - Quick Start Guide

Table Of Contents

Cabling the Cisco uBR10-MC5X20S/U/H Cable Interface Line Card with Universal Cable Holder—UCH2

Contents

Feature Description

Installing the Cables

Installing the UCH

Removing the UCH

Removing the Cables

Troubleshooting

Related Documentation

Obtaining Documentation and Submitting a Service Request

Quick Start Guide

Cabling the Cisco uBR10-MC5X20S/U/H Cable Interface Line Card with Universal Cable Holder—UCH2

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Last Updated: May 14, 2009

OL-24878-01

Contents

This document contains the following information:

•Feature Description

•Installing the Cables

•Installing the UCH

•Removing the UCH

•Removing the Cables

•Troubleshooting

•Related Documentation

Feature Description

The Cisco uBR10-MC5X20S, U and H cable interface line cards use 75-ohm precision video coax cables and 75-ohm MCX connectors to connect to the CMTS.

This document describes how to install and remove cables and the second generation universal cable holder (UCH2).

Figure 1 shows the cards in a Cisco uBR10012 router.

Figure 1 Cisco uBR10-MC5X20S/U/H Cards

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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 separate components.

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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.

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Note In European markets only, you must use the quad-shielded cable kit with the Cisco uBR10-MC5X20H.

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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

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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

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RF Switch Header Blocks

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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

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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. Please refer to Table 3 for the applicable Cisco part numbers.

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Tools required for cable installation include:

•1/4-in. slotted screwdriver and T-10 TORX driver

Also see "Tool Manufacturers and Part Numbers."

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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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Installing the Cables

The UCH must be used for all Cisco uBR10-MC5X20S/U/H line card cable connections. Failure to use the UCH may cause permanent damage to the line card connectors and result in low or no RF output.

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Step 1 Loosen the top screws and slide open the lock bar. (If the UCH2 is already installed in the line card, use a screwdriver to slide open the bar. See Figure 8.)

Step 2 Remove the ESD cap from a cable, and insert it into the hole in the UCH2. See Figure 5.

We recommend that the cables be installed in the UCH as shown in Table 1 and Table 2.

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Caution If using quad-shielded cables, make sure there is no heat-shrink wrap on the ends by the MCX connectors.

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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

Step 3 Insert the cable completely into the UCH. (The cables will fit loosely in the holes until the lock bar is closed in Step 5.)

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Caution Do not kink the cables.

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Figure 5 Inserting a Cable in the UCH2

Step 4 Repeat this procedure for all of the cables.

Step 5 Ensure the cables are fully inserted in the UCH2 and slide the lock bar closed completely. (The lock bar will not close if cables are not fully inserted or properly aligned.)

Step 6 Using the T-10 TORX driver tool tighten the screws on the lock bar (maximum torque—10 in-lbs).

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Installing the UCH

After the cables are installed in the UCH, perform the following steps to prevent ESD damage to the line card.

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Note Before proceeding, remove the protective sticker covering the line card DS ports.

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Step 1 Make sure that you are grounded using an ESD-preventive wrist or ankle strap.

Step 2 Attach a jumper cable to the ground point on the chassis.

Step 3 Briefly touch each cable's center connector with the jumper cable to remove any built-up ESD potential.

Step 4 Position the UCH2 so the red line is on the same side as the red triangle on the faceplate.

Figure 6 Installing the UCH

Step 5 Align the end pins with the pin holes in the faceplate, and guide the UCH onto the faceplate.

Step 6 Hold the cables and UCH in place while finger tightening the leadscrew. Do not bend the cables at right angles.

Step 7 Use the flathead screwdriver to tighten the leadscrew 10 in-lbs, (maximum torque 15 in.-lbs).

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Caution Torquing the leadscrew to more than 20 in-lbs can cause the leadscrew to fail.

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The UCH is fully engaged when the semi-circles on the shroud show metal and the red and black lines are completely covered. See Figure 6.

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Removing the UCH

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Step 1 Make sure that you are grounded using an ESD-preventive wrist or ankle strap.

Step 2 Loosen the lead screw (counterclockwise) until it disengages from the faceplate.

Step 3 Gently pull the UCH straight away from the faceplate.

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Note If the UCH does not easily pull away from the card, loosen the lead screw until it completely disengages from the faceplate.

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Figure 7 Removing the UCH

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Removing the Cables

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Step 1 Use the T-10 TORX driver tool to loosen the lock bar on the side you want to remove cables.

Step 2 Slide the lock bar open by hand, or with a flathead screwdriver if the bar is stuck or hard to access. See Figure 8.

(Make sure the lock bar is completely open or the cables will not release.)

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Caution Be careful not to bend the cables.

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Step 3 Carefully pull the cable out of the hole.

Figure 8 Sliding Open the Lock Bar

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Troubleshooting

Check the following:

1. Verify that the lead screw is tight.

2. Verify that the shroud fits snugly against the faceplate (the cutouts are closed).

3. Verify that the cables are properly seated and secure in the UCH.

If downstream RF power measurements are made, use these ESD precautions to prevent damage to the product:

1. Check for a proper ground on the equipment and chassis before connecting any cables.

2. Ensure that there is a common ground between all the test equipment that you are using and the unit under test.

3. Keep test cables as short as possible to limit static buildup.

4. Before attaching any test cables to the unit under test, momentarily ground the center pin of the test cable to remove any ESD potential that may be present.

Contact Cisco TAC for further information:

http://www.cisco.com/tac

Tool Manufacturers and Part Numbers

Table 3 Tool Part Numbers 

Cisco Systems
1. 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. 2. 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. 3. 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. 4. Universal Cable Holder for MCX connectors, qty 3 pcs 5. RF Switch header blocks for MCX connectors, qty 4 pcs	1. CAB-RFSW520QTIMF2= 2. CAB-RFSW520QTIMM2= 3. CAB-RFSW520QTPMF2= 4. CAB-520-MULT-UCH2 5. CAB-RFSW-MULT-HB
White Sands Engineering, Inc.
F and MCX crimper tool	PN-ACT-483
MCX connector strip tool: 1. Dual-shielded cables 2. Quad-shielded cables	1. PN-CPT-7538-125 2. PN-CPT-7538-200Q
1. Dual-shielded F connector strip tool 2. Quad-shielded F connector strip tool	1. CPT-7538 2. CPT-7538Q
75-ohm precision miniature video cable: 1. Dual-shielded single cable 2. Quad-shielded five pk	1. PN-WS940 2. PN-WS386
MCX fixed pin conn.: 1. Dual-shielded cable 2. Quad-shielded cable	1. PN-MCXFP 2. PN-MCXFPQ
F conn.: 1. Dual-shielded cable 2. Quad-shielded cable	1. PN-ASFP 2. PN-ASFPQ

Related Documentation

•Cisco uBR10-MC5X20S/U/H Cable Interface Line Card for the Cisco uBR10012 Router:

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

•More Cisco cable products information:

http://www.cisco.com/en/US/products/

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. 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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