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DOC-7815730=
OL-19040-01
Q
UICK
S
TART
G
UIDE
Installing Cisco uBR-MC28U/X
and uBR-E-28U
Cable Interface
Line Cards
1
Purpose
2
Feature Description
3
Prerequisites
4
Installing the Card
5
Removing the Card
6
Troubleshooting
7
Technical Specifications
8
Related 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
E
N
A
B
LE
D
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
