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Cisco uBR7200 Series Universal Broadband Routers

Cisco uBR7200 Series Cable Interface Line Card Hardware Installation Guide

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Table of Contents

Cisco uBR7200 Series Cable Interface Line Card Hardware Installation Guide

Document Revision History

Purpose

Audience

Scope

Contents

Cable Interface Line Card Overview

Line Cards Supported on the Cisco uBR7246VXR Router

Line Cards Supported on the Cisco uBR7225VXR Router

Cisco uBR-MC14C Cable Interface Line Cards

Cisco uBR-MC16 Cable Interface Line Cards

Cisco uBR-MC16C

Cisco uBR-MC16E

Cisco uBR-MC16S

Cisco uBR-MC16U/X

Cisco uBR-MC28 Cable Interface Line Cards

Cisco uBR-MC28C

Cisco uBR-MC28U/X

Cisco uBR-MC88V Cable Interface Line Cards

Cisco MCxx Interface and Port Names

Cisco uBR-MC16x, Cisco uBR-MC28x, and Cisco uBR-MC88V Line Card LEDs

Cable Interface Line Card Specifications

Minimum Software Requirements

DOCSIS and EuroDOCSIS Data Rates and Modulation Schemes

Cisco uBR7200 Series Chassis Slot Numbering

Safety Guidelines and Warnings

Electrical Equipment Guidelines

Preventing Electrostatic Discharge Damage

Warning Definition

FCC Class A Compliance

Compliance with U.S. Export Laws and Regulations Regarding Encryption

Cable Interface Line Card Installation Instructions

Prepare for Installation

Parts and Tools

Required Software and Hardware

Remove and Install a Cable Interface Line Card

Removing a Cable Interface Line Card

Installing a Cable Interface Line Card

Coaxial Cable Specifications

Coaxial Cable Issues

Cabling a New Cable Interface Line Card

Attenuation Issues

Adding Attenuation

Troubleshooting the Installation

Basic Cisco IOS Configuration Commands

Related Documentation

Obtaining Documentation and Submitting a Service Request

Cisco uBR7200 Series Cable Interface Line Card Hardware Installation Guide

First Published: December 1999
Last Updated: February 2010

Document Revision History

 

Revision
Date
Change Summary

OL-4137-03

02/15/2010

Added support for the Cisco uBR-MC88V cable interface line card.

OL-4137-02

06/27/2007

Modified OIR support text for cable interface line cards.

OL-4137-01

11/30/2003

Moved document to online only, updated information and format. Added Cisco uBR-MC16U/X and Cisco uBR-MC28U/X information.

78-10494-xx

12/10/1999

Original publication, and updates to 78-10494-04

Purpose

This document provides instructions for installing, removing, and troubleshooting a cable interface line card in a Cisco uBR7200 series universal broadband router.

Audience

This document is intended for use by a field service engineer who is 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.


Scope

This document covers:

  • Installing and removing cable interface line cards in Cisco uBR7225VXR and Cisco uBR7246VXR universal broadband routers.
  • Troubleshooting the installation
  • Basic IOS configuration commands

Note Use this document in conjunction with the Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide. For a list of other documents that may be helpful, see the “Related Documentation” section.


Cable Interface Line Card Overview

Cisco cable interface line cards, together with IF-to-RF upconverters, serve as RF interfaces between the cable headend and Data-over-Cable Service Interface Specifications (DOCSIS)-compliant cable modems, EuroDOCSIS-compliant cable modems, or set-top boxes (STBs). Cisco cable interface line cards separate downstream output and upstream input cable interfaces on the Cisco uBR7200 series universal broadband router to enable downstream and upstream signal combining and splitting arrangements.

Cisco cable interface line cards can be used in 6 MHz National Television Systems Committee (NTSC) standard, 8 MHz Phase Alternating Line (PAL), and Systeme Electronique Couleur Avec Memoire (SECAM) standard channel environments.

The Cisco uBR7200 series universal broadband router supports the following cable interface line cards:

  • Cisco uBR-MC14C
  • Cisco uBR-MC16C
  • Cisco uBR-MC16E (supports 8-MHz operation)
  • Cisco uBR-MC16S (supports spectrum management)
  • Cisco uBR-16U (universal card with onboard upconverters)
  • Cisco uBR16X (universal card without onboard upconverters)
  • Cisco uBR-MC28C
  • Cisco uBR-MC28U (universal card with onboard upconverters)
  • Cisco uBR-MC28X (universal card without onboard upconverters)
  • Cisco uBR-E-28U
  • Cisco uBR-E-16U
  • Cisco uBR-MC88V

Line Cards Supported on the Cisco uBR7246VXR Router

Table 1 lists the line cards that are supported on the Cisco uBR7246VXR router.

 

Table 1 Line Cards Supported on the Cisco uBR7246VXR Router

Line Card
Part Number
NPE Minimum for the Cisco uBR7246VXR Router

Cisco uBR-MC14C

UBR-MC14C

Cisco NPE-225

Cisco uBR-MC28C

UBR-MC28C

Cisco uBR-MC16C

UBR-MC16C

Cisco NPE-400

Cisco uBR-MC16U

UBR16U

Cisco uBR-MC16E

UBR-MC16E

Network Processing Engine G1 (NPE-G1)

Cisco uBR-MC16S

UBR-MC16S

Cisco uBR-MC16X

UBR-MC16X

Cisco uBR-MC28U

UBR-MC28U

Cisco uBR-MC28X

UBR-MC28X

Cisco uBR-MC88V

uBR-MC88V

NPE-G2

Line Cards Supported on the Cisco uBR7225VXR Router

Table 2 lists the line cards that are supported on the Cisco uBR7225VXR router.

 

Table 2 Line Cards Supported on the Cisco uBR7225VXR Router

Line Card
Part Number
NPE Minimum for Cisco uBR7225VXR Router

Cisco uBR-MC28U

UBR-MC28U

NPE-G1

Cisco uBR-E-28U

UBR-E-28U

Cisco uBR-MC16U

UBR-MC16U

Cisco uBR-MC16X

UBR-MC16X

Cisco uBR-E-16U

UBR-E16U

Cisco uBR-MC88V

uBR-MC88V

NPE-G2

Refer to Product Bulletin 1438 for a list of all products associated with the Cisco uBR7200 series universal broadband routers that are at end of life (EOL). For information, see the following URL:

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

Cisco uBR-MC14C Cable Interface Line Cards

The Cisco uBR-MC14C line card features one downstream modulator and four upstream demodulators. The card supports 256 QAM at 40 Mbps downstream and 16 QAM at 5 Mbps upstream default data rates. The Cisco uBR-MC14C line card supports all DOCSIS upstream channel widths described in Table 7 and the card output is +42 dBmV +/- 2 dB.

Figure 1 Cisco uBR-MC14C Cable Interface Line Card

 

 

Cisco uBR-MC16 Cable Interface Line Cards

The Cisco uBR-MC16 cable interface line cards feature one downstream modulator and six upstream demodulators. Four different hardware versions of this cable interface line card currently exist.

Cisco uBR-MC16C

The Cisco uBR-MC16C line card supports 256 QAM at 40 Mbps downstream and 16 QAM at 5 Mbps upstream default data rates. The Cisco uBR-MC16C line card supports all DOCSIS upstream channel widths described in Table 7 , and the card output is +42 dBmV +/- 2 dB.

Figure 2 Cisco uBR-MC16C Cable Interface Line Card

 

 

Cisco uBR-MC16E

The Cisco uBR-MC16E line card supports 256 QAM at 40 Mbps downstream and 16 QAM at 5 Mbps upstream default data rates. The Cisco uBR-MC16E line card supports all upstream channel widths described in Table 7 , and the card output is +40 dBmV +/- 2 dB. The Cisco uBR-MC16E line card supports the ITU J.83 Annex A physical layer and the proposed EuroDOCSIS standard (ECR RFI-R-98036) from Cable Labs.

The Cisco uBR-MC16E line card is designed to provide a two-way data over cable between a headend and the EuroDOCSIS-compliant cable modems and STBs in the 5 to 65 MHz downstream and 85 to 860 MHz upstream European PAL and SECAM 8-MHz channel environments.


Note Although all other Cisco cable interface line cards transmit downstream signals to upconverters using a 44-MHz frequency, the Cisco uBR-MC16E line card transmits downstream IF signals to an upconverter using the 36.125-MHz frequency.


Figure 3 Cisco uBR-MC16E Cable Interface Line Card

 

 

Cisco uBR-MC16S

The Cisco uBR-MC16S line card consists of a motherboard (based on the Cisco uBR-MC16C cable interface line card) and an additional “piggy-back” spectrum management card. The Cisco uBR-MC16S line card supports 256-QAM at 40 Mbps downstream and 16-QAM at 5 Mbps upstream as the default data rates. The Cisco uBR-MC16S line card supports all DOCSIS upstream channel widths described in Table 7 , and the line card output is +42 dBmV +/– 2 dB. In addition, the Cisco uBR-MC16S line card features advanced spectrum management capabilities made possible by hardware and software enhancements.

The advanced spectrum management capabilities of the Cisco uBR-MC16S include the ability to hierarchically scan portions of the upstream spectrum for clean channels of varying widths.

The Cisco uBR-MC16S line card spectrum management daughter card is able to sample the 5- to 42 MHz upstream frequency spectrum and initiate frequency hops based on that information. When a threshold percentage of offline cable modems has been reached, the spectrum management card takes a snapshot of the available upstream spectrum and then passes this information to the Cisco IOS software, where it is analyzed for indications of significant ingress and impulse noise. From this analysis, the Cisco IOS software draws informed conclusions regarding the cleanest portions of the upstream frequency spectrum and automatically initiates a frequency hop to clean upstream channels. The user-defined threshold value is specified by a command in the configuration file of the Cisco uBR7200 series router.

Figure 4 Cisco uBR-MC16S Cable Interface Line Card

 

 

Cisco uBR-MC16U/X

The Cisco uBR-MC16U and Cisco uBR-MC16X (Cisco uBR-MC16U/X) cable interface line cards are two of the new broadband processing engine (BPE) series of cable interfaces that are available for the Cisco uBR7246VXR universal broadband router. The BPE cards provide increased performance and advanced radio frequency (RF) management, as well as innovative, integrated tools for sophisticated content, traffic, and network management.

The Cisco uBR-MC16U/X card has one downstream port and six upstream ports, organized into a single DOCSIS MAC domain. There are two versions, the Cisco uBR-MC16U and the Cisco uBR-MC16X, which are identical except for the type of upconverter that the downstream ports use:

  • Cisco UBR-MC16U card—Each downstream port includes an onboard integrated upconverter that generates an RF signal suitable for connection to a combiner and transmission on the coaxial cable network, without the need for any external upconverters.
  • Cisco uBR-MC16X card—The downstreams on this card do not include integrated upconverters. Instead, the downstream ports generate an IF signal that must be converted through an external upconverter before transmission on the cable network. This allows the Cisco uBR-MC16X card to easily replace existing line card installations that currently use external upconverters.

Figure 5 shows the front panel of the Cisco uBR-MC16U card, and Figure 6 shows the front panel of the Cisco uBR-MC16X card.


Tip The cards have colored tabs; green indicates a “U” card, yellow indicates an “X” card.


Figure 5 Cisco uBR-MC16U Cable Interface Line Card Faceplate

 

Figure 6 Cisco uBR-MC16X Cable Interface Line Card Faceplate

 

 


Note The downstream on the Cisco uBR-MC16U card is labeled “DS0 R” to indicate that its output is an RF-wave from the internal upconverter. The downstream on the Cisco uBR-MC16X card is labeled “DS” to indicate that its output is an IF-wave that requires an external upconverter.


In Cisco IOS Release 12.2(15)CX and later releases, the downstream ports support 64-QAM and 256-QAM, and the upstream ports support QPSK, 8-QAM, 16-QAM, 32-QAM, and 64-QAM modulation, depending on the upstream's mode of operation.

Depending on the configuration, the Cisco uBR-MC16U/X line card supports either DOCSIS or EuroDOCSIS operation:

  • The DOCSIS cable networks are based on the ITU J.83 Annex B physical layer standard and Data-over-Cable Service Interface Specifications (DOCSIS, Annex B) specification, which use 6 MHz National Television Systems Committee (NTSC) channel plans. In this mode, the downstream uses a 6 MHz channel width in the 85 to 860 MHz frequency range, and the upstream supports multiple channel widths in the 5 to 42 MHz frequency range.
  • EuroDOCSIS cable networks are based on the ITU J.112 Annex A physical layer standard and European DOCSIS (EuroDOCSIS, Annex A) specification, which use 8 MHz Phase Alternating Line (PAL) and Systeme Electronique Couleur Avec Memoire (SECAM) channel plans. In this mode, the downstream uses an 8 MHz channel width in the 85- to 860-MHz frequency range, and the upstream supports multiple channel widths in the 5- to 65-MHz frequency range.

When operating in either the DOCSIS or EuroDOCSIS mode of operation, the Cisco uBR-MC16U/X card supports the following types of networks:

  • TDMA-only mode, which supports only DOCSIS 1.0 and DOCSIS 1.1 cable modems.
  • A-TDMA-only mode, which supports DOCSIS 2.0 cable modems.
  • Mixed TDMA/A-TDMA mode, which supports both DOCSIS 1.0/DOCSIS 1.1 and DOCSIS 2.0 cable modems on the same upstream.

For more information, see Configuring the Cisco uBR-MC16U/X Cable Interface Line Card at the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/cable/line_cards/ubr16u_x/configuration/guide/mc16uxfm.html


Note The Cisco uBR-MC16U/X card also supports the extended frequency ranges that are used in Japanese Annex B networks: 70 to 860 MHz (downstream) and 5- to 55-Mhz (upstream).


Cisco uBR-MC28 Cable Interface Line Cards

The Cisco uBR-MC28 cable interface line cards feature two downstream modulators and eight upstream demodulators. Three different hardware versions of this cable interface line card currently exist.

Cisco uBR-MC28C

The Cisco uBR-MC28C line card is divided into two RF domains; each domain has one downstream and four upstream ports. The Cisco uBR-MC28C supports all DOCSIS upstream channel widths described in Table 7 and the DOCSIS downstream for 6-MHz channel width listed on Table 9 . The card output is +42 dBmV +/- 2 dB.

The Cisco uBR-MC28C line card requires an NPE-225 or higher (with 128 MB DRAM) on the Cisco uBR7246VXR router.

Figure 7 Cisco uBR-MC28C Cable Interface Line Card

 

 

Cisco uBR-MC28U/X

The Cisco uBR-MC28U and Cisco uBR-MC28X (Cisco uBR-MC28U/X) cable interface line cards are two of the new broadband processing engine (BPE) series of cable interfaces that are available for the Cisco uBRVXR universal broadband router. The BPE cards provide increased performance and advanced radio frequency (RF) management, as well as innovative, integrated tools for sophisticated content, traffic and network management.

Figure 8 shows the front panel of the Cisco uBR-MC28U line card, and Figure 9 shows the front panel of the Cisco uBR-MC28X line card.


Tip The cards have colored tabs; green indicates a “U” line card, and yellow indicates an “X” line card.


Figure 8 Cisco uBR-MC28U Cable Interface Line Card Faceplate

 

 

Figure 9 Cisco uBR-MC28X Cable Interface Line Card Faceplate

 

 


Note The downstream on the Cisco uBR-MC28U card is labeled “DS0 RF” to indicate that its output is an RF wave from the internal upconverter. The downstream on the Cisco uBR-MC28X card is labeled “DS” to indicate that its output is an IF wave that requires an external upconverter.


In Cisco IOS Release 12.2(15)CX and later releases, the downstream ports support 64-QAM and 256-QAM, and the upstream ports support QPSK, 8-QAM, 16-QAM, 32-QAM, and 64-QAM modulation, depending on the upstream's mode of operation.

Depending on the configuration, the Cisco uBR-MC28U/X line card supports either DOCSIS or EuroDOCSIS operation:

  • DOCSIS cable networks are based on the ITU J.83 Annex B physical layer standard and Data-over-Cable Service Interface Specifications (DOCSIS, Annex B) specification, which use 6 MHz National Television Systems Committee (NTSC) channel plans. In this mode, the downstream uses a 6-MHz channel width in the 85 to 860 MHz frequency range, and the upstream supports multiple channel widths in the 5 to 42 MHz frequency range.
  • EuroDOCSIS cable networks are based on the ITU J.112 Annex A physical layer standard and European DOCSIS (EuroDOCSIS, Annex A) specification, which use 8 MHz Phase Alternating Line (PAL) and Systeme Electronique Couleur Avec Memoire (SECAM) channel plans. In this mode, the downstream uses an 8-MHz channel width in the 85 to 860 MHz frequency range, and the upstream supports multiple channel widths in the 5 to 65 MHz frequency range.

When operating in either the DOCSIS or EuroDOCSIS mode of operation, the Cisco uBR-MC28U/X line card supports the following types of networks:

  • TDMA-only mode, which supports only DOCSIS 1.0 and DOCSIS 1.1 cable modems.
  • A-TDMA-only mode, which supports DOCSIS 2.0 cable modems.
  • Mixed TDMA/A-TDMA mode, which supports both DOCSIS 1.0/DOCSIS 1.1 and DOCSIS 2.0 cable modems on the same upstream.

Note The Cisco uBR-MC28U/X line card also supports the extended frequency ranges that are used in Japanese Annex B networks: 70- to 860-MHz (downstream) and 5- to 55-Mhz (upstream).


For more information, see Configuring the Cisco uBR-MC28U/X Cable Interface Line Card at the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/cable/line_cards/ubr28u_x/configuration/guide/mc28uxfm.html

Cisco uBR-MC88V Cable Interface Line Cards

The Cisco uBR-MC88V cable interface line card is a DOCSIS 3.0 line card designed specifically for Cisco uBR7246VXR and Cisco uBR7225VXR universal broadband routers in Cisco IOS Release 12.2(33)SCD.

The Cisco uBR-MC88V cable interface line card serves as the RF interface between the cable headend and the DOCSIS-compliant cable modems, EuroDOCSIS-compliant cable modems, or set-top boxes (STBs). The Cisco uBR-MC88V cable interface line card has eight RF upstream (US) and two downstream (DS) physical connectors. Each downstream physical connector includes four downstream channels. The Cisco uBR-MC88V line card supports two cable interfaces (MAC domains), and the downstream and upstream channels are dynamically associated with any of these MAC domains.

The Cisco uBR-MC88V cable interface line card supports:

  • DOCSIS and EuroDOCSIS cable modem networks.
  • Downstream channels in the 69 to 999 MHz range.
  • Upstream channels in the 5 to 55 MHz range. (The upstream frequency range changes according the region and Annex A or Annex B configuration.)
  • Annex B and Annex A radio frequency data rates, channel widths, and modulation schemes.
  • DOCSIS MAC management and spectrum management capabilities.

Figure 10 shows the Cisco uBR-MC88V cable interface line card faceplate.

Figure 10 Cisco uBR-MC88V Cable Interface Line Card Faceplate

 

 

1

Upstream F-connectors

3

Captive installation screws

2

Downstream F-connectors

For configuration details, see Configuring the Cisco uBR-MC88V Cable Interface Line Card at the following URL:

http://www.cisco.com/en/US/docs/interfaces_modules/cable/broadband_processing_engines/ubr_mc88v/configuration/guide/mc8x8v_cfg.html

Cisco MCxx Interface and Port Names

The downstream ports on the Cisco uBR-MC14 and Cisco uBR-MC16 cable interface line cards are labeled DS. The downstream ports on the Cisco uBR-MC28 and Cisco uBR-MC88V line cards are labeled DS0 and DS1. Upstream ports for all cable interface line cards are labeled US0 through USn where n represents the upstream port. Each cable interface line card designation indicates the number of upstream and downstream ports available on the card. For instance, the Cisco uBR-MC16C contains one upstream port and six downstream ports. The Cisco uBR-MC28C contains two downstream and eight upstream ports configured in two domains.

Table 3 maps interfaces and physical port names of the line cards. In the Interface column, x is a variable for the card slot where the cable interface line card is installed. This column also indicates the domain of upstream/downstream ports: 0 or 1. Currently, only the Cisco uBR-MC28C uses two domains. The Cisco uBR-MC28C contains two downstream and eight upstream ports divided equally into two domains of four upstream ports and one downstream port. Each domain operates independently; you cannot mix and match upstream and downstream ports.

 

Table 3 Cable Interface Line Card Interface to Port Name Mapping

Cable Interface Line Card
Interface
Port Names

Cisco uBR-MC14C

Cable N/0

DS, US0, US1, US2, US3

Cisco uBR-MC16C,E,S,
U, X

Cable N/0

DS, US0, US1, US2, US3, US4, US5

Cisco uBR-MC28C,U,X

Cable N/0

Cable N/1

DS0, US0, US1, US2, US3

DS1, US4, US5, US6, US7

Cisco uBR-E-28U

Cable N/0

Cable N/1

DS0, DS1

US0, US1, US2, US3

US4, US5, US6, US7

Cisco uBR-E-16U

Cable N/0

DS, US0, US1, US2, US3, US4, US5

Cisco uBR-MC88V

Cable N/0,

Cable N/1

DS0, DS1

US0, US1, US2, US3

US4, US5, US6, US7


Caution Contrary to existing Cisco conventions, the downstream and upstream ports are considered a single logical interface, not separate interfaces.

Cisco uBR-MC16x, Cisco uBR-MC28x, and Cisco uBR-MC88V Line Card LEDs

The LEDs on the Cisco uBR-MC16x, Cisco uBR-MC28x, and Cisco uBR-MC88V cable interface line cards are identical in functionality except for the Cisco uBR-MC16S cable interface line card.

Figure 11 shows the location of the LEDs, using the Cisco uBR-MC28C line card as a representative sample. The Cisco uBR-MC16S line card contains an additional LED for each upstream port to indicate spectrum management activity, as shown in Figure 12.

Figure 11 Cable Interface Line Card LEDs

 

 

Figure 12 Spectrum Management LEDs

 

 

Figure 13 shows the colored tabs used on the Cisco uBR-MC16U/X and Cisco uBR-MC28U/X line cards.

Figure 13 Cisco uBR-MC16U/X (and MC28U/X) Line Cards Have Colored Tabs (uBR-MC16U shown)

 

 

The location of the Enabled LED on the Cisco uBR-MC88V line card is different from that of Cisco uBR-MC16x and Cisco uBR-MC28x line cards, as shown in Figure 14.

Figure 14 Cable Interface Line Card LEDs on Cisco uBR-MC88V

 

 

Table 4 describes the functions of the LEDs on the cards.

 

Table 4 Cable Interface Line Card LEDs

LED Label
Color
State
Description

ENABLED

Green

On

The line card is operating normally, receiving DC power from the router midplane, and enabled for operation.

N/A

Off

Either the card is shut down or the slot is not working.

Upstream (US)

Green

On

For each upstream port, indicates that the upstream path is enabled.

N/A

Off

Either the port is not configured, or is shut down, or the slot is not working.

Downstream (DS)

Green

On

For each downstream port, indicates that the downstream path is enabled.

N/A

Off

Either the port is not configured, or is shut down, or the slot isn’t working.

MGR ACT
(Cisco uBR-MC16S only)

Green

On

With Cisco IOS Release 12.0.7 XR2 or Cisco IOS Release 12.1.1 (T), indicates that a spectrum group has been configured.

With Cisco IOS Release 12.1.2 (EC) or Cisco IOS Release 12.1.2 (T), indicates that the Cisco uBR-MC16S spectrum management card has initiated an upstream frequency hop from a potentially noisy channel to a cleaner channel.

N/A

Off

Either the port is not configured, or is shut down, or the slot is not working.

 


Note Although all other Cisco cable interface line cards transmit downstream signals to upconverters using a 44-MHz frequency, the Cisco uBR-MC16E line card transmits downstream IF signals to an upconverter using the 36.125-MHz frequency. The upconverter must support PAL or SECAM channel operation.


Cable Interface Line Card Specifications

Table 5 lists the default downstream and upstream modulation scheme and output power for each cable interface line card. As noted, the cable interface line cards support either the DOCSIS and EuroDOCSIS standards listed in Table 7 .

 

Table 5 Cable Interface Line Card Specifications

Cable Interface Line Card
Downstream Modulation
Upstream Modulation
Output Power

Cisco uBR-MC14C

64–QAM

QPSK

+42 dBmV +/– 2 dB

Cisco uBR-MC16E 1

64–QAM, 256–QAM

QPSK, 16–QAM

+40 dBmV +/–2 dB

Cisco uBR-MC16C

64–QAM, 256–QAM

QPSK, 16–QAM

+42 dBmV +/– 2 dB

Cisco uBR-MC16S

64–QAM

QPSK

+42 dBmV +/– 2 dB

Cisco uBR-MC16U

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+50 to 61 dBmV (RF) 2

Cisco uBR-MC16X

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+42 dBmV +/– 2 dB (IF)

Cisco uBR-MC28C

64–QAM

QPSK

+42 dBmV +/– 2 dB

Cisco uBR-MC28U

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+50 to 61 dBmV (RF) 2.

Cisco uBR-MC28X

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+42 dBmV +/– 2 dB (IF)

Cisco uBR-E-28U

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+50 to 61 dBmV (RF)

Cisco uBR-E-16U

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+50 to 61 dBmV (RF)

Cisco uBR-MC88V

64–QAM, 256–QAM

QPSK, 8–, 16–, 32–, 64–QAM

+44 to 60 dBmV (RF) 3

1.Supports the ITU J.83 Annex A physical layer and the proposed EuroDOCSIS standard (ECR RFI-R-98036) from Cable Labs. The Cisco uBR-MC16E is designed to provide a two-way data over cable between a headend and the EuroDOCSIS-compliant cable modems and STBs in the 5 to 65 MHz upstream and 85 to 860 MHz downstream European PAL and SECAM 8-MHz channel environments.

2.In Cisco IOS, this range is extended to +45 to 63 dBmv compared to Downstream RF Interface (DRFI) 2.0 Specifications.

3.In Cisco IOS, this range is extended to +44 to 63 dBmv compared to Downstream RF Interface (DRFI) 3.0 Specifications.

Minimum Software Requirements

Table 6 summarizes the minimum required Cisco IOS release image necessary to support each type of Cisco cable interface line card, as well as the minimum Cisco IOS release required for basic DOCSIS or EuroDOCSIS functionality. Certain features require other minimum releases. See the appropriate feature module for more information.

 

Table 6 Minimum Required Cisco IOS Release Images by Cable Interface Line Card Type

Cable Interface Line Card
Minimum Cisco IOS Release Images

Cisco uBR-MC14C, and Cisco uBR-MC16C

Cisco IOS Release 12.0(5)T1 or later release of Cisco IOS Release 12.0 T
Cisco IOS Release 12.1(1a)T1 or later release of Cisco IOS Release 12.1 T

Cisco uBR-MC16E

Cisco IOS Release 12.0(8)SC1 or later release of Cisco IOS Release 12.0 SC
Cisco IOS Release 12.0(7)T or later release of Cisco IOS Release 12.0 T
Cisco IOS Release 12.1(1a)T1 or later release of Cisco IOS Release 12.1 T

Cisco uBR-MC16S4

Cisco IOS Release 12.0(7)XR2 or later release of Cisco IOS Release 12.0 XR
Cisco IOS Release 12.1(1)T or later release of Cisco IOS Release 12.1 T

Cisco uBR-MC28C

Cisco IOS Release 12.1(3a)EC1 or later release of Cisco IOS Release 12.1 EC

Cisco uBR-MC16U/X

Cisco IOS Release 12.2(15)CX

Cisco uBR-MC28U/X

Cisco IOS Release 12.2(15)CX

Cisco uBR-E-28U

Cisco IOS Release 12.2(33)SCA

Cisco uBR-E-16U

Cisco IOS Release 12.2(33)SCA

Cisco uBR-MC88V

Cisco IOS Release 12.2(33)SCD

4.Cisco IOS Release 12.1(3a)EC1 or later release of Cisco IOS Release 12.1 EC is required for certain advanced spectrum management features, such as Dynamic Upstream Modulation.

DOCSIS and EuroDOCSIS Data Rates and Modulation Schemes

Cisco cable interface line cards can be configured in a number of different upstream combinations based on the card used, cable network, and the anticipated subscription and service levels.

Table 7 lists the data rates and modulation schemes for both DOCSIS1.1 and EuroDOCSIS 1.1 standards.

.

Table 7 DOCSIS and EuroDOCSIS 1.1 Upstream Data Rates

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

3.2 MHz

16-QAM (4)
QPSK (2)

2.56 M

10.24
5.12

9.0
4.6

1.6 MHz

16-QAM (4)
QPSK (2)

1.28 M

5.12
2.56

4.5
2.3

800 kHz

16-QAM (4)
QPSK (2)

640 K

2.56
1.28

2.3
1.2

400 kHz

16-QAM (4)
QPSK (2)

320 K

1.28
0.64

1.2
0.6

200 kHz

16-QAM (4)
QPSK (2)

160 K

0.64
0.32

0.6
0.3

Table 8 lists the data rates and modulation schemes for DOCSIS and EuroDOCSIS 2.0 and 3.0 standards.

 

Table 8 DOCSIS and EuroDOCSIS 2.0 and 3.0 Upstream Data Rates

Upstream Channel Width
Modulation Scheme, bit/symbol
Baud Rate, symbol/sec
Raw Bit Rate, Mb/sec
Throughput (Bit Rate - Overhead), 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 9 lists the DOCSIS and EuroDOCSIS downstream data rates.

 

Table 9 DOCSIS and EuroDOCSIS Downstream Data Rates

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

Cisco uBR7200 Series Chassis Slot Numbering

Figure 15 shows the chassis slot numbering scheme used in the Cisco uBR7246VXR router. Chassis slot numbering begins with the port adapters in slot 0.

Figure 15 Cisco uBR7246VXR Chassis Slot Numbering

 

 

Figure 16 shows the chassis slot numbering scheme used in the Cisco uBR7225VXR router.

Figure 16 Cisco uBR7225VXR Chassis Slot Numbering

 

 

1

Card slot 1

2

Card slot 2

Safety Guidelines and Warnings

Following are safety guidelines that you should take into consideration when working with any equipment that connects to electrical power or telephone wiring.

Electrical Equipment Guidelines

Follow these basic guidelines when working with any electrical equipment:

  • Before beginning any procedures requiring access to the chassis interior, locate the emergency power-off switch for the room in which you are working.
  • Disconnect all power and external cables before moving a chassis.
  • Do not work alone if potentially hazardous conditions exist.
  • Never assume that power has been disconnected from a circuit; always check.
  • Do not perform any action that creates a potential hazard to people or makes the equipment unsafe; carefully examine your work area for possible hazards such as moist floors, ungrounded power extension cables, and missing safety grounds.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are improperly handled, results in complete or intermittent failures. Cable interface line cards comprise printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are integral components of the carrier. Although the metal carrier helps to protect the board from ESD, always use a preventive anti-static strap when handling equipment.

Following are guidelines for preventing ESD damage:

  • Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
  • Connect the equipment end of the strap to an unfinished chassis surface.
  • When installing a component, use any available ejector levers or captive installation screws to properly seat the bus connectors in the backplane or midplane. These devices prevent accidental removal, provide proper grounding for the system, and help to ensure that bus connectors are properly seated.
  • When removing a component, use any available ejector levers or captive installation screws to release the bus connectors from the backplane or midplane.
  • Handle carriers by available handles or edges only; avoid touching the printed circuit boards or connectors.
  • Place a removed component board-side-up on an anti-static surface or in a static shielding container. If you plan to return the component to the factory, immediately place it in a static shielding container.
  • Avoid contact between the printed circuit boards and clothing. The wrist strap only protects components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
  • Never attempt to remove the printed circuit board from the metal carrier.

Caution Periodically check the resistance value of the anti-static strap. The measurement should be within the range of 1 to 10 megohm (Mohm).

Figure 17 shows the location of a printed circuit board when it is installed on a Cisco uBR7200 series cable interface line card metal carrier. Do not touch the printed circuit board when handling either component.

Figure 17 Handling the Cisco uBR7200 Series Cable Interface Line Cards—Side View

 


Caution Be sure to tighten the captive installation screws on the cable interface line cards (use a number 2 Phillips screwdriver). These screws prevent accidental removal, provide proper grounding for the router, and help to ensure that the cable interface line cards are properly seated in the router midplane.

Warning Definition

 


Warning


IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device. Statement 1071

SAVE THESE INSTRUCTIONS

Waarschuwing

BELANGRIJKE VEILIGHEIDSINSTRUCTIES

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen.

BEWAAR DEZE INSTRUCTIES

Varoitus

TÄRKEITÄ TURVALLISUUSOHJEITA

Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla.

SÄILYTÄ NÄMÄ OHJEET

Attention

IMPORTANTES INFORMATIONS DE SÉCURITÉ

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement.

CONSERVEZ CES INFORMATIONS

Warnung

WICHTIGE SICHERHEITSHINWEISE

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden.

BEWAHREN SIE DIESE HINWEISE GUT AUF.

Avvertenza

IMPORTANTI ISTRUZIONI SULLA SICUREZZA

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento.

CONSERVARE QUESTE ISTRUZIONI

Advarsel

VIKTIGE SIKKERHETSINSTRUKSJONER

Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten.

TA VARE PÅ DISSE INSTRUKSJONENE

Aviso

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo.

GUARDE ESTAS INSTRUÇÕES

¡Advertencia!

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo.

GUARDE ESTAS INSTRUCCIONES

Varning!

VIKTIGA SÄKERHETSANVISNINGAR

Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning.

SPARA DESSA ANVISNINGAR

 

 

 

 

 

 

 

 

 

 

Aviso

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você se encontra em uma situação em que há risco de lesões corporais. Antes de trabalhar com qualquer equipamento, esteja ciente dos riscos que envolvem os circuitos elétricos e familiarize-se com as práticas padrão de prevenção de acidentes. Use o número da declaração fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham o dispositivo.

GUARDE ESTAS INSTRUÇÕES

Advarsel

VIGTIGE SIKKERHEDSANVISNINGER

Dette advarselssymbol betyder fare. Du befinder dig i en situation med risiko for legemesbeskadigelse. Før du begynder arbejde på udstyr, skal du være opmærksom på de involverede risici, der er ved elektriske kredsløb, og du skal sætte dig ind i standardprocedurer til undgåelse af ulykker. Brug erklæringsnummeret efter hver advarsel for at finde oversættelsen i de oversatte advarsler, der fulgte med denne enhed.

GEM DISSE ANVISNINGER

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

FCC Class A Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices.

If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

  • Turn the television or radio antenna until the interference stops.
  • Move the equipment to one side or the other of the television or radio.
  • Move the equipment farther away from the television or radio.
  • Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

Compliance with U.S. Export Laws and Regulations Regarding Encryption

This product can perform encryption (if the baseline privacy feature is included in your particular software image) and is regulated for export by the U.S. Government. Following is specific information regarding compliance with U.S. export laws and regulations for encryption products:

  • This product is not authorized for use by persons located outside the United States and Canada that do not have export license authority from the U.S. Government.
  • This product may not be exported outside the U.S. and Canada either by physical or electronic means without the prior written approval of the U.S. Government.
  • Persons outside the U.S. and Canada may not reexport, resell, or transfer this product by either physical or electronic means without prior written approval of the U.S. Government.

Cable Interface Line Card Installation Instructions

The following sections describe how to remove and install Cisco cable interface line cards in a Cisco uBR7200 series universal broadband router. In addition, this section includes safety and ESD-prevention guidelines to help you avoid injury to yourself and damage to the equipment.

Prepare for Installation

Parts and Tools

You will need the following tools and parts to remove and replace the cable interface line card. If you need additional equipment, contact a service representative for ordering information:

  • New cable interface line card
  • Number 2 Phillips screwdriver
  • 3/16-inch flat-blade screwdriver
  • Your own ESD-prevention equipment or the disposable grounding wrist strap included with all upgrade kits, FRUs, and spares
  • Anti-static mat or surface
  • Static shielding bag

Required Software and Hardware

Ensure that your network is designed to support reliable broadband data transmission. At minimum, your network must include:

  • Computer on the WAN side of your Cisco uBR7200 series router configured as a dynamic host configuration protocol (DHCP) server to assign IP addresses to cable modems or set-top boxes on the hybrid-fiber coaxial (HFC) network.
  • Cisco uBR7200 series-compatible IF-to-RF upconverter installed in the downstream data path at your headend site. (Cisco uBR-MC16U cable interface line cards and Cisco uBR-MC28U cable interface line cards do not require upconverters.) The upconverter is installed between the Cisco uBR7200 series router and the combiner. The combiner refers to all cables, amplifiers, and taps at the headend or cable distribution center that connect the Cisco uBR7200 series router to the HFC network.

Note In a North American 6-MHz channel environment, Cisco cable interface line cards transmit downstream IF signals to IF-to-RF upconverters at a 44-MHz frequency. In a European 8-MHz channel environment, Cisco cable interface line cards transmit downstream IF signals to IF-to-RF upconverters at a 36.125 MHz frequency. Ensure that your particular upconverter supports the appropriate IF input from your cable interface line card.


  • Diplex filters installed in the downstream RF path between the cable modems and the cable interface line cards in the Cisco uBR7200 series router.
  • EIA/TIA-59 headend coaxial cable with the maximum braid available (60% + 40% braid), double foil, and the correct connector for this cable.

Note For more information on DHCP servers, upconverters, and coaxial cables, refer to the Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide.


Complete a basic configuration of the Cisco uBR7200 series router. This includes, as a minimum, the following tasks:

  • Configure a host name and password for the Cisco uBR7200 series router.
  • Configure the Cisco uBR7200 series to support IP.
  • Install at least one Cisco cable interface line card in the appropriate slot of Cisco uBR7200 series router chassis.
  • Install and configure at least one port adapter to provide backbone connectivity.
  • Cisco uBR7200 series-compatible IF-to-RF upconverter installed in your downstream path. Ensure that your upconverter supports the appropriate IF input from your cable interface line card.
  • EIA/TIA-59 headend coaxial cable with a minimum of 60% + 40% braid, double foil, and a center connector with a diameter of 0.022 inch (0.056 mm) to 0.042 inch (1.07 mm). EIA/TIA-59/U and EIA/TIA-6 coaxial cable can also be used, but EIA/TIA-59 cable is recommended.
  • An appropriate Cisco IOS release software image to support both your Cisco uBR7200 series universal broadband router and cable interface line card selection. For specific information regarding minimum cable interface line card software image requirements, see the “Minimum Software Requirements” section.

Remove and Install a Cable Interface Line Card

The following sections explain how to remove, replace, or install a cable interface line card in the Cisco uBR7200 series routers.

Observe the following warnings and cautions when installing or removing Cisco cable interface line cards.


Warning During this procedure, wear grounding wrist straps to avoid ESD damage to the card. Do not directly touch the backplane with your hand or any metal tool, or you could shock yourself. Statement 93



Caution To prevent jamming the carrier between the upper and the lower edges of the cable interface line card slot, and to ensure that the edge connector at the rear of the cable interface line card seats properly in the midplane, make certain that the carrier is positioned correctly, as shown in Figure 19.


Caution When a cable interface line card slot is not in use, a blank cable interface line card must fill the empty slot to allow the router to conform to electromagnetic interference (EMI) emissions requirements and to allow proper airflow across all system components.

The Cisco uBR7200 series universal broadband router supports online insertion and removal (OIR), or “hot swapping,” of cable interface line cards. Technically, the Cisco uBR7200 series universal broadband routers support true OIR of cable interface line cards only when exchanging cable interface line cards of the exact same type (for example, exchanging a Cisco uBR-MC28U card for another Cisco uBR-MC28U card). Under these conditions, no reload of the router is required.


Caution When you OIR different types of cable interface line cards (for example, a Cisco uBR-MC16C card replaced by a Cisco uBR-MC16S card, or Cisco uBR-MC16C card replaced by a Cisco uBR-MC28U card), you might have to reconfigure the interfaces, and we recommend that you reload the router. Refer to the Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide for more specific information regarding OIR.

Removing a Cable Interface Line Card

The following procedure explains how to remove a cable interface line card from a Cisco uBR7200 series router.


Step 1 Make sure that you are properly grounded.

Step 2 Disconnect all cables from the front of the card.

Step 3 Unscrew the captive installation screws. (See Figure 18.)

Figure 18 Captive Installation Screws (Cisco uBR-MC16C Shown)

 

Step 4 Grasp the handle on the front of the card and carefully pull the card from the chassis.


Caution Always handle the cable interface line card by the carrier edges and handle; never touch the card’s components or connector pins. (See Figure 17.)

Step 5 Place the card on an antistatic surface with its components facing upward, or in a static shielding bag. If the card is being returned to the factory, immediately place it in a static shielding bag.


 

Installing a Cable Interface Line Card

Complete the following steps to install a cable interface line card in the Cisco uBR7200 series router.


Step 1 Make sure that you are properly grounded.

Step 2 Use both hands to grasp the cable interface line 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 is facing up.

Step 3 Gently slide the card into the slot until you feel the card’s connectors mate with the midplane.

The LEDs comes on and then begins to blink as the card goes though a power on self-test (POST). When the POST is complete, the LEDs turn green.

If the LED’s do not go on, refer to the “Troubleshooting the Installation” section


Note Figure 19 shows the chassis with only one cable interface line card being installed and the other available card slot left empty, revealing the inside of the chassis. This is only for illustrative purposes. The Cisco uBR7200 series universal broadband router should never operate with open cable interface line card slots. All card slots must be filled with Cisco cable interface line cards or blank cards provided by Cisco, to ensure proper airflow through the chassis.


Step 4 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.


Tip If the line card installation screws do not appropriately assume a locked position, the cable interface line card is not completely seated in the midplane and you need to reseat the card in the chassis.


Figure 19 Aligning the Cable Interface Line Card with the Slot Guides (Cisco uBR7246VXR)

 

Step 5 Connect all required coaxial cables to the front of the cable interface line card.


Note For more information about cabling, see the “Cabling a New Cable Interface Line Card” section.



 

Coaxial Cable Specifications

Cisco recommends a high-quality, headend-grade coaxial cable or a quad-shield coaxial cable with a minimum of 60% + 40% braid and double foil insulation to connect the cable interface line cards to the HFC network. The center conductor must be straight and extend 1/8 inch (3.2 mm) beyond the end of the connector. The connector should be securely crimped to the cable. The following cables are recommended:

  • EIA/TIA-59—0.034 inch (0.86 mm) center conductor diameter
  • EIA/TIA-59/U—0.0226 inch (0.57 mm) center conductor diameter
  • EIA/TIA-6—0.041 inch (1.05 mm) center conductor diameter

Note All three of the coaxial cables listed can be used to connect a Cisco cable interface line card to the HFC network; however, the consistent use of EIA/TIA-59 cable is preferred. If you connect an EIA/TIA-59 cable to a cable interface line card that was previously connected using EIA/TIA-6 cable, the difference in the center connector diameter might cause intermittent connectivity loss.


Coaxial Cable Issues

If you use different types of coaxial cable, the following problems can appear:

  • Co-channel interference—If signals at the same frequency are carried on long, parallel runs of coaxial cable, interference can occur between the signals. Higher-quality cable helps to prevent this with better shielding. Co-channel interference is seen as hum or patterns in analog video channels and as intermittent data loss in digital channels.
  • Damage to Cisco uBR7200 series cable interface line card connectors—Cable interface line card connectors are designed for EIA/TIA-EIA/TIA or EIA/TIA-6 cable and connectors. Larger cables can damage the connectors.
  • High signal return loss—High-quality cable and correct connectors help to ensure an optimal return loss of 16 dB or more.

Note For additional configuration and site requirement information related to the setup of the analog RF signal and digital data, refer to the Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/installation/guide/ub72khig.html


Cabling a New Cable Interface Line Card

To cable a new cable interface line card, connect the downstream ports to an IF-to-RF converter and connect the upstream cables to the upstream ports. With a Cisco uBR-MC28C cable interface line card, do not mix upstream ports from domain 0 with upstream ports in domain 1.

All cards use coaxial cable F-connectors, as shown in Figure 20.

Figure 20 Attaching Cables to the F-Connectors (Cisco uBR-MC28C Shown)

 

Attenuation Issues

These Cisco MC xx cable interface line cards—Cisco uBR-MC14C, Cisco uBR-MC16C, Cisco uBR-MC16S, and Cisco uBR-MC28C— deliver +42 dBmV IF output power to the IF-to-RF upconverter at the cable headend. This power rating is 10-dB greater than earlier Cisco uBR-MC11 FPGA and Cisco uBR-MC16B cards, which delivered +32 dBmV output power. Without an attenuator in your downstream configuration, you could overload the upconverter input, causing an unacceptably low signal-to-noise ratio and possible interference with adjacent channels. However, not all Cisco recommended IF-to-RF upconverters need this attenuator added to their downstream path. Table 10 lists the IF-to-RF upconverters that Cisco recommends if an attenuator is required.


Note The Cisco uBR-MC16E cable interface line card does not need additional 10-dB attenuation in the downstream path.


 

Table 10 Recommended IF-to-RF Upconverters

IF-to-RF Upconverter Vendor and Model Number
Need 10-dB Attenuator?

General Instrument C6U

Yes

General Instrument C8U

Yes

Vecima MA4040B

Yes

Vecima UC4040B

Yes

Scientific Atlanta Continuum 9860

No

Scientific Atlanta Continuum 9861

No

Barco Gemini

No

Adding Attenuation

If you need to add a 10-dB attenuator to your downstream configuration, perform the following steps.


Step 1 Remove the coaxial cable originating at your cable interface line card from the downstream input F-connector on your IF-to-RF upconverter.

Step 2 Install the 10-dB attenuator on the input F-connector on your IF-to-RF upconverter.

Step 3 Reattach the coaxial cable originating at your cable interface line card to the female end of the 10-dB attenuator to restore your downstream IF link.


 

Figure 21 displays a simplified example of the downstream path between your cable interface line card and IF-to-RF upconverter with the optional 10-dB attenuator positioned at your upconverter’s downstream IF input.

Figure 21 Sample Installation—Using a 10-dB Attenuator at the IF Input of the Upconverter

 


 

Troubleshooting the Installation

When the card is inserted into the backplane in the chassis, the LEDs come on and the card goes through the power-on self-test (POST).


Tip The LEDs blink when the card is going through the POST.


If the enabled LEDs do not come on after the POST, check the following:

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

a. Release the ejector levers and 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 backplane.

c. Close the ejector levers and tighten the captive screws.

2. Verify that the captive screws and ejector levers are secure.

a. a. Check that the captive screws are secure in the faceplate.

b. b. Check that the ejectors levers are properly closed.

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

4. If the enabled LEDs remain off after the above checks, it is likely that the system has detected a processor hardware failure. Contact Cisco TAC for further information.

Basic Cisco IOS Configuration Commands

To effectively configure your Cisco cable interface line card, you need to ensure that you have the minimum required software release to support it. See Table 6 for a list of minimum required Cisco IOS release images by cable interface line card type.

Table 11 presents a list of basic configuration and diagnostic Cisco IOS commands that you can use to initially configure and troubleshoot Cisco cable interface line card installation. For complete command line syntax examples and more definitive explanations of command-line functions, refer to the Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide at the following URL:

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html


Note Different Cisco IOS release software images support different subsets of Cisco IOS software features in Table 11. Be sure that your particular Cisco IOS image offers the software features you need to effectively configure your Cisco cable interface line cards.


 

Table 11 Cisco IOS Commands and Descriptions

Command
Description

cable arp

Designed to operate while in cable interface configuration mode. Allows you to activate IP Address Resolution Protocol (ARP) on specified cable interfaces.

cable bundle

Designed to operate while in cable interface configuration mode. Allows you to assign specified upstream cable interfaces to bundles.

cable dhcp-giaddr

Designed to operate while in cable interface configuration mode. Allows you to specify whether the Cisco uBR7200 series will assign primary addresses to both cable modems and remote hosts or assign primary addresses to cable modems and secondary addresses to remote hosts.

cable downstream

Designed to operate while in cable interface configuration mode. Among other functions, the subcommands following the cable downstream command allow you to activate the downstream carrier interface, itself; specify the downstream IF output frequency (in Hz); specify the interleave depth; configure downstream rate-limiting values; and specify whether or not the downstream carrier on a Cisco uBR-MC16E will operate using an Annex A (European) or Annex B (North American) framing format.

cable flap-list

Designed to operate while in global configuration mode. Allows you to specify attributes of the cable flap list, including maximum length, recording duration, and entry threshold values for items in the list.

cable intercept

Designed to operate while in cable interface configuration mode. Allows you to automatically transmit data received on a specified upstream interface to two destinations on the network.

cable interface

Accesses cable interface configuration mode, allowing you to specify the slot and interface number of the cable interface line card you want to configure. For example, to configure upstream port 0 on a cable interface line card in slot 3 of your router, you would enter the cable interface 3/0 command.

cable insertion-interval

Designed to operate while in cable interface configuration mode. Allows you to define the maximum insertion interval for cable modems attached to the specified upstream cable interface.

cable ip-broadcast-echo

Designed to operate while in cable interface configuration mode. Allows you to enable and disable IP broadcast echo behavior on a specified cable interface.

cable ip-multicast-echo

Designed to operate while in cable interface configuration mode. Allows you to enable and disable IP multicast echo behavior on a specified cable interface.

cable max-hosts

Designed to operate while in cable interface configuration mode. Allows you to specify the maximum number of hosts that can be connected to a cable modem on the network.

cable modem remote-query

Designed to operate while in global configuration mode. Allows you to activate and specify intervals between subsequent SNMP queries from the Cisco uBR7200 series router.

cable modulation-profile

Designed to operate while in global configuration mode. Allows you to activate and configure up to 8 different modulation profiles that can then be assigned to upstream cable interfaces on your Cisco uBR7200 series router.

Among the various characteristics you can specify when creating your modulation profiles are the interval usage code, FEC codeword values, maximum burst length, modulation scheme (16-QAM or QPSK), scrambler activation or deactivation, and the presence or absence of differential encoding.

Preconfigured modulation profiles are best used to rapidly configure more than one upstream cable interface requiring the same set of guidelines or preset behavior.

cable privacy

Designed to operate while in cable interface configuration mode. Allows you to activate and deactivate privacy between remote cable modems and the Cisco uBR7200 series router. In addition, you can use the cable privacy command to activate and configure both key encryption key (kek) and traffic encryption key (tek) values for specified cable interfaces.

cable proxy-arp

Designed to operate while in cable interface configuration mode. Allows you to activate cable proxy ARP for host-to-host communications on specified cable interfaces.

cable qos

Designed to operate while in global configuration mode. Allows you to create or modify QoS profiles on your Cisco uBR7200 series router.

The types of QoS characteristics you can specify for a given QoS profile are the guaranteed upstream rate (in kbps), maximum burst size, maximum downstream data rate, priority, type of service (ToS) mask (in hex bits). In addition, you can use the cable qos command to enable or disable the various levels of permission.

cable registration-timeout

Designed to operate while in cable interface configuration mode. Allows you to specify the maximum number of minutes that pass before a cable modem is declared inactive and the connection timed out.

cable relay-agent-option

Designed to operate while in cable interface configuration mode. Allows you to enable and disable the cable relay agent on a specified cable interface.

cable service-flow

Designed to operate while in global configuration mode. Allows you to activate and configure service flow inactivity timeout between the Cisco uBR7200 series router and cable modems.

cable shared-secret

Designed to operate while in cable interface configuration mode. Allows you to enable and disable cable modem authentication on a specified upstream cable interface.

cable source-verify

Designed to operate while in cable interface configuration mode. Allows you to activate and deactivate cable modem upstream verification on a specified upstream cable interface.

cable spectrum-group

Designed to operate while in global configuration mode. Allows you to activate and configure up to 32 different blind and scheduled spectrum management groups that can then be assigned to upstream cable interfaces on your Cisco uBR7200 series router.

Characteristics of spectrum groups that you can specify include predetermined frequencies for automatic frequency hops and specific times of the day to perform scheduled frequency hops.

The most important application of this suite of commands is to provide you with efficient control over upstream channels, resulting in more effective spectrum management through greater frequency agility.

cable sync-interval

Designed to operate while in cable interface configuration mode. Allows you to specify the interval between subsequent sync messages from the Cisco uBR7200 series router.

cable telco-return

Designed to operate while in cable interface configuration mode. Allows you to activate and configure characteristics of DOCSIS telco return communication between cable modems and the Cisco uBR7200 series router. Parameters that you can specify for telco return communication include TCP packet transmission intervals, DHCP authentication information, PPP authentication type, dial-up phone numbers for access, usernames, passwords, and connection-attempt threshold values.

cable time-server

Designed to operate while in global configuration mode. Allows you to activate and deactivate Time-of-Day (ToD) service on the Cisco uBR7200 series router.

cable upstream

Designed to operate while in cable interface configuration mode. The subcommands following the cable upstream command allow you to activate the upstream interface, itself; set the upstream channel width; set and tune the input power level; configure upstream rate-limiting values; specify IP helper addresses for upstream interfaces; and activate or deactivate forward error correction (FEC), concatenation, and the upstream scrambler.

clear cable modem

Designed to operate while in cable interface configuration mode. Allows you to remove one or more cable modems from the station maintenance list and reset them on the cable network.

debug cable

Designed to operate while in enable (privileged EXEC) mode. Allows you to troubleshoot specified cable interfaces on your Cisco uBR7200 series router.

To view a complete list of the subcommands under the debug cable command, enter debug cable ? , and the list of available parameters will be displayed.

To disable specific debug message production, simply preface the debug cable parameter command with the no keyword. For example, to turn off cable privacy debug commands, enter the no debug cable privacy command.

To disable all debug message production, enter the undebug all command.

show cable

Designed to operate while in enable (privileged EXEC) mode. Allows you to view the various cable configuration settings on your Cisco uBR7200 series router.

To view a complete list of the subcommands under the show cable command, enter
show cable ?, and the list of available parameters will be displayed.

show interface

Designed to operate while in enable (privileged EXEC) mode. Allows you to view the configuration settings for a specified cable interface.

To view a complete list of the subcommands under the show interface command, enter cable show slot number/interface number upstream|downstream ? and the list of available parameters will be displayed.

Related Documentation

Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/installation/guide/ub72khig.html

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/configuration/guide/cr72scg.html

Cisco IOS CMTS Cable Software Configuration Guide, Release 12.2SC

http://www.cisco.com/web/techdoc/cable/Config/Sw_conf.html

Cisco IOS CMTS Cable Command Reference

http://www.cisco.com/en/US/docs/ios/cable/command/reference/cbl_book.html

Cisco Network Registrar for the Cisco uBR7200 Series

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/feature/guide/cabregst.html

Cisco IOS CMTS Cable System Messages Guide

http://www.cisco.com/en/US/docs/cable/cmts/system/message/uberrmes.html

Cisco uBR7200 Series Release Notes

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

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

http://www.cisco.com/en/US/docs/cable/cmts/ubr7200/regulatory/compliance/ub72rcsi.html

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html .

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