APC IP DSLAM User's Guide Page 16

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EDA 1200 System Overview
Figure 10 EDA 1200 Access Network Architecture
The ECN can also be used as control unit without aggregating traffic. In the
following figure the internal switching unit in the ECN is only used to connect
the Node Controller to the network, and the uplink from the ECN only carries
management traffic. Naturally it is possible to extend the Ethernet Access Node
with more embedded switches and IP DSLAMs. Please refer to the ECN User
Guide for a detailed description of an Ethernet Access Node topologies.
Figure 11 EDA 1200 Access Network Architecture
The Ethernet Access Node is a flexible node that allow any combination of the
two previous figures.
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