Cisco UBR-MC28U Bedienungsanleitung

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DOC-7815730=

OL-19040-01

QUICK START GUIDE

Installing Cisco uBR-MC28U/X

and uBR-E-28U Cable Interface

Line Cards

1Purpose

2Feature Description

3Prerequisites

4Installing the Card

5Removing the Card

6Troubleshooting

7Technical Specifications

8Related Documentation

Warning

Only trained and qualified

personnel should be allowed to

install, replace, or service this

product; and should be properly

grounded before handling this

ESD-sensitive product.

1 Purpose

This quick start guide shows you how to install a

Cisco uBR-MC28 cable interface line card in the

Cisco uBR7200 series router.

2 Feature Description

The Cisco uBR-MC28 cable interface line card

improves RF performance, supports spectrum

management, increases system performance and

supports online insertion and removal (OIR).

The line card is available in three configurations:

•Cisco uBR-MC28U—with an onboard

upconverter and green end tabs

•Cisco uBR-MC28X—without an onboard

upconverter and with yellow end tabs

•Cisco uBR-E-28U—with an onboard

upconverter and slate blue end tabs

3 Prerequisites

•The Cisco NPE-400 or Cisco NPE-G1 or Cisco

NPE-G2 must be used with this card.

•If you are replacing a Cisco uBR-MC28C card

with a Cisco uBR-MC28U/X/E card, you must

reconfigure the card. We strongly recommend

that you reload the Cisco 7200 series router

when replacing a cable interface line card with

a card of a different type.

4 Installing the Card

Note The uBR-E-28U is an entry-level version of

MC28U, for the uBR7225 chassis. The

extra guide pins in the line card prevents it

from being plugged into a different

chassis.

Step 1 Make sure that you are grounded.

Step 2 Use both hands to grasp the card by its

metal carrier edges and align the card with

the slot guides, component side up.

Step 3 With the metal carrier aligned in the slot

guides (see Figure 1), gently slide the card

into the card slot until you can feel it

seated in the backplane connectors.

Step 4 Tighten the captive screws.

Note The captive screws provide grounding for

the electromagnetic interference (EMI)

shielding.

Figure 1 Installing the Card in the Chassis

Note The cable interface line card

insertion/removal method is the same for

all Cisco uBR7200 series routers.

Cabling

Caution Do not mix upstream (US) ports in

domain 0 with US ports in domain 1

(see Figure 2).

88984

US0

US1

US2

US3

US4

US5

US6

US7

ENABLED

DS0-RF

DS1-RF

uBR- MC28U

Figure 2 Domain 0 and Domain 1

Cabling the Cisco uBR-MC28U/E-28U

The Cisco uBR-MC28U/E-28U line card has an

onboard upconverter. To cable the card:

Step 1 Connect the downstream (DS) cables to

the DS ports (DS0–DS1). RF DS port rings

and end tabs are green (slate blue in the

case of E-28U card). See Figure 5.

Step 2 Connect the upstream cables to the US

ports (US0–US7).

Cabling the Cisco uBR-MC28X

The Cisco uBR-MC28X line card does not have an

onboard upconverter. The card may require up to

10 dB of attenuation due to a higher IF output

power (higher then legacy Cisco line cards). To

cable the card:

Step 1 Connect the DS cables to the DS ports on

the card (DS0–DS1).

IF DS port rings and end tabs are yellow.

See Figure 3.

Step 2 Add RF attenuators as required to get the

correct IF output. Insert the attenuator

between the DS IF output cable and the

upconverter. See Figure 3.

88983

US2

US4

US5

US6

US7

ENABLED

DS0-RF

DS1-RF

uBR - MC28U

US1

US0

US3

Domain 0 Domain1

Step 3 Connect the US cables to the US ports on

the card (US0–US7). All US ports are light

blue.

Figure 3 Inserting an Attenuator

5 Removing the Card

To prevent the alarms from activating,

administratively shut down the card using the

shutdown command in interface configuration

mode before removing it from the chassis.

Step 1 Make sure that you are properly

grounded.

Step 2 Disconnect all the cables from the cable

interface line card.

Step 3 Unscrew the captive installation screws on

the faceplate.

Figure 4 Removing the Card from the Chassis

Step 4 Grasp the handle and carefully pull the

card out of its slot (see Figure 4).

+42 dBmV

US2

US4

US5

US6

US7

ENABLED

DS0-IF

DS1-IF

uBR - MC28X

US1

US0

US3

88993

Upconverter

Attenuator

Cable

Connector

88982

US0

US1

US2

US3

US4

US5

US6

US7

ENABLED

DS0-RF

DS1-RF

uBR- MC28U

Caution Always handle the card by the carrier

edges and handle; never touch the

cable interface line card’s components

or connector pins. For proper cooling

and airflow, always install a line card

cover in an empty line card slot.

Step 5 Place the card on an antistatic surface with

its components facing upward.

Note If the card is being returned to the factory,

immediately place it in a static shielding

bag and proper packaging for protection.

6 Troubleshooting

1. Make sure that the card is securely seated in

the chassis.

If the captive screws do not tighten all the way,

the card is not properly seated in the chassis or

backplane. Carefully pull the card halfway out

of the slot, reinsert it, and tighten the captive

installation screws.

Caution A partially seated line card can cause

the router to reboot.

2. Are all enabled LEDs on? If yes, the system is

operational.

If no, check the following possibilities:

a. If the card has been enabled and

configured for operations, the enabled

LED remains on.

b. If a port is enabled but its enabled LED is

still off, check if the card has pulled away

from the router. Reseat the card in its slot.

(Do not have to turn off the system power

to do this.} After the system reinitializes

the interfaces, the enabled LED on the

card should come on.

3. 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.

Figure 5 LEDs

7 Technical Specifications

Ta b l e 1 L E D s / S t a t u s

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

Ta b l e 2 Te c h n i c a l S p e c i f i c a t i o n s

Description Order Num/ Specifications

Cisco uBR-MC28U,

with upconverter

Cisco uBR-MC28X,

without upconverter

Cisco uBR-E-28U,

with upconverter

UBR-MC28U,

UBR-MC28U=

UBR-MC28X,

UBR-MC28X=

UBR-E-28U

UBR-E-28U=

Blank covers UBR-MC-COVER=

Weight—MC28U/E-

28U

Weight—MC28X

6 lbs (2.72 kg)

4.75 lbs (2.15 kg)

Power consumption

MC28U/E-28U

MC28X

80 Watts (273 BTU/h)

50 Watts (170.6 BTU/h)

88985

US2

US4

US5

US6

US7

ENABLED

DS0-RF

DS1-RF

uBR - MC28U

US1

US0

US3

Downstream

LEDs

DS0-DS1

Upstream

LEDs

US0-US7

Enabled

LED

8 Related Documentation

•Cisco uBR7200 Series Universal Broadband

Router Hardware Installation Guide

•Cisco uBR7200 Series Cable Interface Line

Card Hardware Installation Guide

•For the 1–year warranty information, visit the

following URL:

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

arranties_listing.html

Output—MC28U/E-

28U

Output—MC28X

+50 to 61 dBmV at RF

+42 dBmV at IF (+/-2 dB)

Modulation

Upstream (US0–US7) QPSK 8–, 16–, 32–,

64–QAM

Downstream

(DS0–DS1)

64–QAM, 256–QAM

RF output power range—50 to 61 dBmV

Frequency range

Upstream

Downstream

5–65 MHz

70–860 MHz

The Cisco uBR-MC28U/X/E-28U line card is

compatible with most cable systems worldwide,

including but not limited to—Asia Pacific,

Europe, and the Americas. See Cisco IOS release

notes for more information.

Table 2 Technical Specifications (continued)

Description Order Num/ Specifications

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