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Cisco ATUC-4DMT-ISDN Line Card Installation and Configuration
78-10981-01
Line Card Direct Connect Deployment
CPE Hardware Group
The CPE hardware group (see Figure 4) consists of customer and telco equipment. Customer
PC equipment connected to a customer Ethernet LAN receives and transmits Ethernet data only. The
Cisco 677i modem is telco equipment that interfaces with an Ethernet line and converts Ethernet data
to DMT signals. Customers must use a telco-provided Cisco 677i modem to produce DMT signals for
proper ATUC-4DMT-ISDN line card operation.
This section describes how the component configuration illustrated in Figure 4 relates to proper line
card operation.
Cisco 677i Modem
At a customer site, you must use the Cisco 677i modem to provide the Ethernet LAN interface (see
Figure 4) at the downstream end of the line. The 677i modem provides the interface between a customer
Ethernet and a line card. Specifically, the customer Cisco 677i modem provides the network
ATUC-R DMT signaling function, which
•
Has an Ethernet port that interfaces physically with an Ethernet LAN
•
Converts line card downstream DMT signaling to its Ethernet data equivalent for transfer to the
customer Ethernet LAN
•
Has a DMT port that interfaces physically with the outside plant loop
•
Converts upstream Ethernet data to an equivalent DMT signal for transfer to the line cards through
the telco CO facility MDF
CO Facility Hardware Group
The CO facility hardware group (see Figure 4) consists of
•
The telco MDF
•
Cisco equipment housed in a telco rack containing one or more Cisco 6260 DSLAMs with line
cards LC
1
, and LC
2
through LC
N
(where N can have any value between 3 and 30)
The CO facility equipment routes signals DMT
1
, DMT
2
, and DMT
3
through DMT
N
between the
CPE 677i modems and the MDF.
In the:
•
Upstream direction—Line cards convert DMT signals to ATM formatted cells for application to the
NI-2 interface processor modules
•
Downstream direction—Line cards convert ATM cells to DMT signals for application to the
MDF and customer modems
Cisco equipment using these line cards includes
•
One or more Cisco 6260 DSLAMs in telco racks
•
Up to 30 line cards in each Cisco 6260 DSLAM
•
An NI-2 network interface processor module in each 6260 DSLAM
