Cisco UBR10-MC5X20H Manual de usuario

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Cabling the Cisco uBR10-MC5X20S/U/H Cable

Interface Line Card with Universal Cable

Holder—UCH2

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

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

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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

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.

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.

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

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

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Feature Description

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

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

1F Connectors 2UCH2

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Installing the Cables

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

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.

Tools required for cable installation include:

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

Also see “Tool Manufacturers and Part Numbers.”

Note The following instructions describe the connection process for the customized RF cables and the

maintenance of the Cisco preconfigured cable bundles.

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.

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.)

1RF Switch Header Blocks 2UCH2

1F Connectors 2RF Switch Header Blocks

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Installing the Cables

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.

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

connectors.

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.

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

US10

1. US = upstream

Red US10 Grey DS20

2. DS = downstream

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 — —

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

US10Red US10Red DS

20Red

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 — —

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

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Installing the UCH

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.)

Caution Do not kink the cables.

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).

Installing the UCH

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

card.

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

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.

US7 Blue US17 Blue — —

US8 Green US18 Green — —

US9 Yellow US19 Yellow — —

1. US = upstream

2. DS = downstream

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

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

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Removing the UCH

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).

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

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.

Removing the UCH

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.

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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Red triangle

Small pin

Shroud

Large pin

Red line

Cutout

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

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Removing the Cables

Figure 7 Removing the UCH

Removing the Cables

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.)

Caution Be careful not to bend the cables.

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

Ta b l e 3 To o l P a r t N u m b e r s

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

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

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