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Line Card Splitter Deployment
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CO Facility Hardware Group
The CO facility hardware group consists of Cisco and telco equipment that processes both ISDN and
DMT signals (see Figure 5). The CO facility Cisco equipment transfers DMT signals between local
DSL subscribers and the wide area network (WAN) trunk interface through the MDF, the
DMT/ISDN CO splitter, and the line cards. Cisco equipment includes
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Other equipment at the CO facility associated with DMT/ISDN signal processing includes
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This section describes the relationship between the line cards and the components in the CO facility
hardware group illustrated in Figure 5.
Main Distribution Frame
The MDF distributes DMT/ISDN signals (see Figure 5)
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DMT/ISDN CO Splitter
The telco facility DMT/ISDN CO splitter (see Figure 5):
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Line Cards
ATUC-4DMT-ISDN line cards function as described in the "Line Cards" section on page 13. In
Figure 5, Cisco line cards LC
downstream AMT cells to DMT signals.
Because a CO DMT/ISDN splitter is required with each 6260 DSLAM, you can only install two
Cisco 6260 DSLAMs, populated with ATUC-4DMT-ISDN line cards, in a splitter-configured standard
NEBS compliant 7-foot CO facility rack.
Cisco ATUC-4DMT-ISDN Line Card Installation and Configuration
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Feeds the line card downstream DMT signal to the Cisco 677i modem for conversion to equivalent
Ethernet data for application to the customer LAN
Combines upstream ISDN and DMT signals from the subscriber modem into a DMT/ISDN data
stream for application to the CO facility DMT/ISDN splitter through the MDF
One or more Cisco 6260 DSLAMs
Up to 30 line cards in each DSLAM
An NI-2 network interface processor module in each Cisco 6260 DSLAM
The MDF
One or more CO facility DMT/ISDN splitters
A PSTN ISDN exchange switch
From subscriber CPE splitters to the CO facility DMT/ISDN splitter
From the CO facility DMT/ISDN splitter to the subscriber CPE DMT/ISDN splitter
Separates combined line signals DMT/ISDN
distribution to the line cards and to the PSTN ISDN exchange, respectively
Electrically combines line card signal DMT
through DMT
with signals ISDN
N
DMT/ISDN CPE splitter through the MDF
1
and DMT/ISDN
1
with ISDN exchange signal ISDN
1
through ISDN
for distribution on the same line pair to the
2
N
and LC
through LC
convert upstream DMT signals to AMT cells and
2
N
through DMT/ISDN
for
2
N
and signals DMT
1
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