Cisco Systems uBR-MC28X User Manual
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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

 

 

 

 

 

 

 

 

uBR - MC28X

DS0-

DS1-

US0

US1

US2

US3

US4

US5

US6

US7

 

 

IF

IF

+42 dBmV

ENABLED

88993

 

 

Connector

Upconverter

Attenuator

Cable

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

88982

 

 

 

 

 

 

 

 

uBR - MC28U

DS0-

DS1-

US0

US1

US2

US3

US4

US5

US6

US7

 

RF

RF

Step 4 Grasp the handle and carefully pull the card out of its slot (seeFigure 4).

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

 

 

 

 

 

 

 

 

Enabled

 

 

 

 

 

 

 

 

 

LED

 

 

 

 

 

 

 

 

uBR - MC28U

D

D

US0

US1

US2

US3

US4

US5

US6

US7

S0

S1

F

F

 

 

 

 

 

 

 

 

-R

-R

 

 

 

 

 

 

 

 

 

ENABLED

 

Upstream

Downstream

88985

 

LEDs

LEDs

 

US0-US7

DS0-DS1

 

Table 1

LEDs/Status

 

 

 

 

 

 

 

LED/Status

 

Description

 

 

 

 

 

ENABLED—green

Card operating normally

 

ENABLED—off

Card not enabled

 

 

 

 

 

US—green

 

Upstream enabled

 

US—off

 

Upstream not enabled

 

 

 

 

 

DS—green

 

Downstream enabled

 

DS—off

 

Downstream not enabled

 

 

 

 

 

 

7 Technical Specifications

Table 2

Technical Specifications

 

 

 

Description

 

Order Num/ Specifications

 

 

Cisco uBR-MC28U,

UBR-MC28U,

with upconverter

UBR-MC28U=

Cisco uBR-MC28X,

UBR-MC28X,

without upconverter

UBR-MC28X=

Cisco uBR-E-28U,

UBR-E-28U

with upconverter

UBR-E-28U=

 

 

 

 

Blank covers

UBR-MC-COVER=

 

 

Weight—MC28U/E-

6 lbs (2.72 kg)

28U

 

4.75 lbs (2.15 kg)

Weight—MC28X

 

 

 

Power consumption

 

MC28U/E-28U

80 Watts (273 BTU/h)

MC28X

 

50 Watts (170.6 BTU/h)

 

 

 

Table 2 Technical Specifications (continued)

Description

Order Num/ Specifications

 

 

Output—MC28U/E-

+50 to 61 dBmV at RF

28U

 

Output—MC28X

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

 

 

 

Modulation

 

 

 

Upstream (US0–US7)

QPSK 8–,16–,32–,

 

64–QAM

 

 

Downstream

64–QAM,256–QAM

(DS0–DS1)

 

 

 

RF output power range—50to 61 dBmV

 

 

Frequency range

 

Upstream

5–65MHz

Downstream

70–860MHz

 

 

The Cisco uBR-MC28U/X/E-28Uline card is compatible with most cable systems worldwide, including but not limitedto—AsiaPacific, Europe, and the Americas. See Cisco IOS release notes for more information.

8 Related Documentation

For more information, refer to the following at Cisco.com:

Cisco uBR7200 Universal Broadband Series Hardware Installation Guide

Cisco uBR7200 Series Cable Interface Line Card Hardware Installation Guide

Cisco uBR7200 Series Universal Broadband Routers

For the 1–yearwarranty information, visit the following URL:

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