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Chapter 1. Introduction
1-2 ATLAS 810
PLUS
User Manual 61200266L1-1
The ATLAS modules include the following:
•HDLC Module
Quad T1/PRI Module
Octal Basic Rate ISDN Module
T3 Module
Async-232 Module
Modem-16 Module
Frame Relay
Frame relay is a packet-switched service that allows efficient transfer of
bursty traffic in a WAN environment. It offers lower-cost data transfer when
compared to typical point-to-point applications. Using virtual connections
within the frame relay network and combining those into a single physical
connection at each location result in lower cost. Frame relay providers use a
frame relay switch to route the data on each virtual circuit to the appropriate
destination. Figures 1-1 and 1-2 illustrate a conversion from a typical point-
to-point application to a frame relay application.
Figure 1-1. Point-to-Point Circuit
Router
Router
Router
Router
PBX
PBX
PBX
PBX
Frac T1
Frac T1
Frac T1
ATLAS 810
PLUS
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