Figure 1: Private Line Aggregation with the E Series Router
The router supports a number of access and uplink methods; the most common
pairings are listed in Table 3 on page 5.
Table 3: Common Access/Uplink Pairings
UplinkAccess
ATM, Fast Ethernet, Gigabit Ethernet, or POSPPP
Frame Relay
ATM
xDSL Session Termination
The router supports Broadband Remote Access Server (B-RAS) applications, as shown
in Figure 2 on page 6. In this application, the router handles the aggregated output
from the digital subscriber line access multiplexers (DSLAMs). Directly connected to
the subscriber premises, the DSLAMs handle the copper termination and aggregate
the traffic into a higher-speed uplink. The output from the DSLAM is fed into the
router through a DS3 or OC3 link.
Edge Applications Overview â– 5
Chapter 1: Planning Your Network
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