Advertisement
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
+42 dBmV
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
uBR - MC28U
Step 4
Grasp the handle and carefully pull the
card out of its slot (see Figure 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
further information and help.
Figure 5
LEDs
Enabled
LED
uBR - MC28U
Upstream
Downstream
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
for
Output—MC28U/E-
+50 to 61 dBmV at RF
28U
Output—MC28X
+42 dBmV at IF (+/-2 dB)
Modulation
Upstream (US0–US7) QPSK 8–, 16–, 32–,
64–QAM
Downstream
64–QAM, 256–QAM
(DS0–DS1)
RF output power range—50 to 61 dBmV
Frequency range
5–65 MHz
Upstream
70–860 MHz
Downstream
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.
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
Advertisement
