Cisco Systems uBR10-MC5X20S User Manual
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Cabling the

Cisco uBR10-MC5X20S/U/HCable Interface Line Card with Universal CableHolder—UCH2

1Feature Description

2Installing the Cables

3Installing the UCH

4Removing the UCH

5Removing the Cables

6Troubleshooting

7Related Documentation

Warning

Only trained and qualified

 

personnel should be allowed to

 

install, replace, or service this

 

equipment.

 

 

Caution Use anESD-preventivewrist or ankle strap during the line card installation.

1 Feature Description

The Cisco uBR10-MC5X20S,U and H cable interface line cards use75–ohmprecision video coax cables and75–ohmMCX 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/HCards

Downstream

DS0RF

DS1RF

DS2RF

DS3RF

DS4RF

D-MC5x20S-uBR10

Upstream

US0

US1

US2

US3

US4

US5

US6

US7

US8

US9

72783

The cables come in kits that consist of cable sets and spare F connectors.

The MC5X20 dual-shieldedcable kit includes:

Two 10-bundleMCX to “F” conn.,3–mcables

One 5-bundleMCX to “F” conn.,3–mcables

28 spare F connectors

The MC5X20 quad-shieldedcable kit includes:

Five 5-bundleMCX to “F” conn.,3–mcables

Five spare F connectors

The cable kits do not contain the universal cable holder (UCH); however, the UCH is available with

line card accessory kits and spare cards. Or, the UCH2 is available as a spare.

Note In European markets only, you must use thequad-shieldedcable kit with the CiscouBR10-MC5X20H.

Tools required for cable installation include:

1/4-in.slotted screwdriver andT-10TORX driver

Also see “Tool Manufacturers and Part Numbers.”

2 Installing the Cables

The UCH must be used for all Cisco uBR10MC5X20S/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. SeeFigure 5.)

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

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

Caution If usingquad-shieldedcables, make sure there is noheat-shrinkwrap on the ends by the MCX connectors.

Table 1 Port—Dual-ShieldedCable Colors

US0–US9 US0 toUS9–red,white, blue, green, yellow, violet, orange, black, gray, brown, respectively.

US10–US19 US10–grey;US11–brown;US12 toUS19–red,white, blue, green, yellow, violet, orange, black, respectively.

DS0–DS4 DS0 toDS4–red,white, blue, green, yellow, respectively.

Table 2 Port—Quad-ShieldedCable Colors

US0–US9 US0 toUS9–red,white, blue, green, yellow, red, white, blue, green, yellow, respectively.

US10–US19 US10 toUS19–red,white, blue, green, yellow, red, white, blue, green, yellow, respectively.

DS0–DS4 DS0 toDS4–red,white, blue, green, yellow, respectively.

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

Caution Do not kink the cables.

Figure 2 Inserting a Cable in the UCH2

155826

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 theT-10TORX driver tool tighten the screws on the lock bar (maximumtorque—10in-lbs).

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3 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 anESD-preventivewrist 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 anybuilt-upESD potential.

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

Figure 3 Installing the UCH

Red line

 

Small pin

 

US0

Red triangle

 

US1

 

 

US2

 

 

US3

 

 

US4

 

US5

 

US6

Shroud

US7

US8

 

US9

 

 

Large pin

Lead screw

155818

Cutout

 

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 10in–lbs,(maximum torque 15in.-lbs).

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

The UCH is fully engaged when the semi-circleson the shroud show metal and the red and black lines are completely covered. SeeFigure 3.

4 Removing the UCH

Step 1 Make sure that you are grounded using anESD-preventivewrist 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.

Figure 4 Removing the UCH

1/4 in. flathead screwdriver

Red line

US0

 

US1

Shroud

US2

US3

 

US4

 

US5

US6

US7

US8

US9

155819

5 Removing the Cables

Step 1 Use theT-10TORX 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. SeeFigure 5.

(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 5 Sliding Open the Lock Bar

155820

6 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

MC5X20 dual-shielded

CAB-RFSW520TPMF=

MC5X20 quad-shielded

CAB-RFSW520QTPMF=

UCH2

CAB-520-UCH2

 

 

White Sands Engineering, Inc.

F and MCX crimper tool

PN–ACT-483

 

 

MCX connector strip tool:

 

Dual-shieldedcables

PN–CPT-7538-125

Quad-shieldedcables

PN–CPT-7538-200Q

 

 

Dual-shieldedF connector

CPT-7538

strip tool

 

Quad-shieldedF connector

CPT-7538Q

strip tool

 

 

 

75–ohmprecision miniature

 

video cable:

 

Dual-shieldedsingle cable

PN–WS940

Quad-shieldedfive pk

PN–WS386

 

 

MCX fixed pin conn.:

 

Dual-shieldedcable

PN–MCXFP

Quad-shieldedcable

PN–MCXFPQ

 

 

F conn.:

 

Dual-shieldedcable

PN–ASFP

Quad-shieldedcable

PN–ASFPQ

 

 

7 Related Documentation

Cisco uBR10-MC5X20S/U/HCable Interface Line Card for the Cisco uBR10012 Router:

http://www.cisco.com/univercd/cc/td/doc/

product/cable/ubr10k/ubr10012/frus/

index.htm

More Cisco cable products information:

http://www.cisco.com/warp/public/44/jump/

cable.shtml