363-206-305
Applications
2-4
Issue 3 June 2000
Figure 2-1. Path Switched Ring
A network which requires the bulk of its traffic to be dropped at a single node is an
ideal application for path switched rings. A typical loop feeder network, where
most traffic is between the subscriber loop to a central office, fits this mold. Such
an application calls for the delivery of protected DS1 and DS3 service to customer
locations. In many cases, where the network serves only voice traffic and DS1s, a
DDM-2000 FiberReach/OC-3/
SLC
-2000 path switched ring is a perfect fit. If DS3
service or a mixture of DS1 and DS3 service is needed, one or more OC-3 rings
may be necessary. Cost, fiber availability, and bandwidth flexibility all play a part in
determining whether a single OC-1 or OC-3 ring, multiple OC-1 or OC-3 rings, or
an OC-12 ring will be the best network solution.
Node C
Node A
Node B
AC
CA
(a.) Normal Operation
Node A
AC
CA
AC
CA
Node C
AC
CA
(b.) Path Failure
SWITCH
MADE
Host
Node
Node B
Host
Node
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