363-206-305
Applications
Issue 3 June 2000
2-65
Figure 2-48 also shows an optical drop/insert DS1 extension from the SONET
rings implemented with RFL 9001 Intelligent Multiplexers. This extension is useful
for serving low bandwidth sites remote from the SONET backbone. The figure
shows a single host DDM-2000 interconnecting the rings, but a dual ring
interworking (DRI) could be used to provide node survivability.
Figure 2-48. DDM-2000 FiberReach Teleprotection and SCADA Communications
DS1s
Drop/Insert
T1
Multiplexer
DDM-
2000
DDM-2000
DDM-
2000
Drop/Insert
T1
Multiplexer
Drop/Insert
T1
Multiplexer
Drop/Insert
T1
Multiplexer
HOST
DDM-
2000
OC-3/12
Ring
OC-1
Ring
Drop/Insert
T1
Multiplexer
Power
Grid
Fiber-
Reach
Fiber-
Reach
DS1s
Drop/Insert
T1
Multiplexer
Drop/Insert
T1
Multiplexer
DS1s
DS1s
DS1s
DS1s
DS1s
DS1 Optical
DS1 Optical
FiberReach
Node
Node
Node
Node
Note: Teleprotection and Supervisory Control
and Data Acquisition (SCADA)
Node
Node
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