Cisco uBR-MC88V Cable Interface Line Card Quick Start Guide

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Updated:February 14, 2010

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Cisco uBR-MC88V Cable Interface Line Card - Quick Start Guide

Table Of Contents

Cisco uBR-MC88V Cable Interface Line Card - Quick Start Guide

Contents

Overview

Installing the Cisco uBR-MC88V Cable Interface Line Card

Cabling the Cisco uBR-MC88V Cable Interface Line Card

Removing the Cisco uBR-MC88V Cable Interface Line Card

Troubleshooting

Technical Specifications

Related Documentation

Obtaining Documentation and Submitting a Service Request


Cisco uBR-MC88V Cable Interface Line Card - Quick Start Guide

Revised: February 15, 2010, OL-26627-01

Contents

This document includes procedures for installing and removing the Cisco uBR-MC88V Cable Interface Line Card.

•Overview

•Installing the Cisco uBR-MC88V Cable Interface Line Card

•Cabling the Cisco uBR-MC88V Cable Interface Line Card

•Removing the Cisco uBR-MC88V Cable Interface Line Card

•Troubleshooting

•Technical Specifications

•Related Documentation

Overview

The Cisco uBR-MC88V cable interface line card serves as the radio frequency (RF) interface between the cable headend and the Data over Cable Service Interface Specifications (DOCSIS)-compliant cable modems, EuroDOCSIS-compliant cable modems, or set-top boxes (STBs). The uBR-MC88V cable interface line cards have eight RF upstream (US) and two downstream (DS) physical connectors. Each downstream physical connector includes four DS channels. uBR-MC88V is a DOCSIS 3.0 line card for the uBR7246VXR and uBR7225VXR universal broadband router family. Figure 1 shows the Cisco uBR-MC88V cable interface line card faceplate.

Figure 1 Cisco uBR-MC88V Cable Interface Line Card Faceplate

Installing the Cisco uBR-MC88V Cable Interface Line Card

To install a Cisco uBR-MC88V cable interface line card in the Cisco uBR7200 series router, complete the following steps:

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

Step 1 Use both hands to grasp the card by its metal carrier edges and align the left and right edges of the card with the guides in the card slot. The component side of the card must be facing up.

Step 2 With the metal carrier aligned in the slot guides (see Figure 2), gently slide the card into the slot until you feel the card seat in the midplane.

Note If the card is inserted properly, the enabled LED turns green when the host router recognizes the line card. If the enabled LED does not turn green, see the Troubleshooting section for details.

Figure 2 Installing the Cisco uBR-MC88V Cable Interface Line Card

Note Figure 2 shows the chassis with only one line card being installed and the other available card slots are shown as empty, thus revealing the inside of the chassis. This representation is only for illustrative purpose. You should never operate the Cisco uBR7200 series universal broadband router with open card slots. You must fill all card slots either with Cisco cable interface line cards or with blank cards provided by Cisco, to ensure proper airflow through the chassis.

Step 3 Tighten the captive installation screws on the card. If the captive screws on the card do not tighten all the way, the card is not completely seated in the midplane. Carefully pull the card out of the slot, reinsert it, and tighten the captive installation screws.

Caution A partially seated card can cause the Cisco uBR7200 series universal broadband router to reboot.

Step 4 Connect all the required coaxial cables to the front of the cable interface line card. For more information on cabling, see the Cabling the Cisco uBR-MC88V Cable Interface Line Card section.

Note After you install the Cisco uBR-MC88V cable interface line card, you must configure the upstream (US) and downstream (DS) ports on the card. For more details on line card configuration, see the Configuring the Cisco uBR-MC88V Cable Interface Line Card document at http://www.cisco.com/en/US/products/hw/modules/ps4969/products_installation_and_configuration_guides_list.html

Cabling the Cisco uBR-MC88V Cable Interface Line Card

To cable the Cisco uBR-MC88V cable interface line card, connect the downstream and upstream ports to a combiner. The card uses coaxial cable F-connectors, as shown in Figure 3.

Figure 3 Attaching Cable to the F-Connectors

Removing the Cisco uBR-MC88V Cable Interface Line Card

To remove a Cisco uBR-MC88V cable interface line card from the Cisco uBR7200 series universal broadband router, complete the following steps:

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

Step 1 Disconnect all cables from the front of the card.

Step 2 Unscrew the captive installation screws.

Step 3 Grasp the handle on the front of the card and carefully pull the card from the chassis.

Caution Always handle the card by its carrier edges and handle. Do not touch the card components or connector pins. (See Figure 4.)

Figure 4 Removing the Card from the Chassis

Troubleshooting

If the card is inserted properly, the enabled LED (Figure 5) turns green when the host router recognizes the line card. See Table 1 for LED description.

Figure 5 LEDs

Table 1

LED/Status
Description

ENABLED—green
ENABLED—off

Card operating normally
Card not enabled

US—green
US—off

Upstream enabled
Upstream not enabled

DS—green
DS—off

Downstream enabled
Downstream not enabled


LED Description

If the enabled LED does not turn green, check the following:

1. Verify that the card is properly seated in the chassis.

a. Release the captive screws.

b. Slide the card partially out of the chassis and then slide it back in, making sure that it is properly seated in the midplane.

c. Tighten the captive screws.

2. Verify that the captive screws are secure on the faceplate.

3. Verify that the card has been configured for that slot.

4. If the enabled LED remains off after the above checks, it is likely that the system has detected a processor hardware failure. Go to the Cisco TAC website http://www.cisco.com/tac for further information and help.

Technical Specifications

Table 2 DOCSIS and EuroDOCSIS 2.0 and 3.0 Upstream Data Rates

Upstream Channel
Width
Modulation Scheme in bit/symbol
Baud Rate in
symbol/sec
Raw Bit Rate in
Mb/sec
Throughput (Bit Rate -
Overhead) in Mb/sec

6.4 MHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

5.12M

30.96

25.80

20.54

15.48

10.30

27.2

22.3

19.8

13.3

8.9

3.2 MHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

2.56 M

15.48

12.90

10.30

7.68

5.12

13.3

11

8.9

6.6

4.4

1.6 MHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

1.28 M

7.68

6.45

5.12

3.84

2.56

6.6

5.5

4.4

3.3

2.2

800 kHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

640 K

3.84

3.20

2.56

1.92

1.28

3.3

2.75

2.2

1.65

1.1

400 kHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

320 K

1.92

1.60

1.28

0.96

0.64

1.65

1.38

1.1

0.83

0.54

200 kHz

64-QAM

32-QAM

16-QAM

8-QAM

QPSK

160 K

0.96

0.80

0.64

0.48

0.32

0.83

0.63

0.54

0.40

0.27


Table 3 DOCSIS and EuroDOCSIS Downstream Data Rates

Downstream Channel
Width in MHz
Modulation Scheme in
bit/symbol
Baud Rate in
symbol/sec
Raw Bit Rate in
Mb/sec
Throughput (Bit Rate -
Overhead) in Mb/sec

6

64 QAM (6)

256 QAM (8)

5.056

5.360

30.34

42.88

27

39

8

64 QAM (6)

256 QAM (8)

6.592

6.592

39.55

52.74

36

51


Table 4 Output Power Level

Output Power per Channel for N Channels Combined on to a Single RF port
Output Power in dBmV per Channel

N=1

52 to 60

Note You can configure the RF output power up to a maximum of 62 dBmV. However, the RF performance is not guaranteed when the power is greater than 60 dBmV.

N=2

48 to 56

N=3

46 to 54

N=4

44 to 52


Related Documentation

For safety information, refer to:

Regulatory Compliance and Safety Information for Cisco uBR7200 Series Universal Broadband Routers

For additional hardware installation and software configuration information, go to:

http://www.cisco.com/en/US/products/hw/cable/ps2217/tsd_products_support_series_home.html

For fan tray and power supply replacement instructions, go to:

http://www.cisco.com/en/US/products/hw/cable/ps2217/prod_installation_guides_list.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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© 2009 Cisco Systems, Inc. All rights reserved.

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