363-206-305
Applications
Issue 3 June 2000
2-45
STS-3c 0X1 Optical Interface
2
This new interface provides the ability of transporting STS-3c services on an
OC-3c low-speed Function Unit optical interface that has been provisioned for 0X1
applications.
Ring path switching is not done on the DDM-2000 FiberReach ring; rather STS-3c
level path switching is done elsewhere in the network (for instance, when the
FiberReach ring is used to transport ATM STS-3c traffic, path switching (rerouting)
is normally executed through the external ATM switch/routers).
With 0X1 application, the FiberReach ring passes the content of the STS-3c time
slots between the low-speed OC-3 lines and the OC-3 high-speed lines without
terminating them or performing any path protection switching on them.
Figure 2-35 and Figure 2-36 are example applications in which the FiberReach
Multiplexer is equipped with 22-type OLIUs in the function unit slots providing
OC-3c access.
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