363-206-305
Applications
2-12
Issue 3 June 2000
DDM-2000 FiberReach can also be extended from an OC-12/virtual tributary (VT)
path-switched ring as shown in Figure 2-5. The DDM-2000 OC-3 system at the
host node grooms and packs VT1.5 channels from the OC-1 extension rings for
maximum utilization of the OC-12 backbone ring. Both the host OC-3 and OC-12
systems use the ring (0x1) low-speed interfaces, with 60 millisecond path
protection switching performed, at the remote DDM-2000 FiberReach and wire
center DDM-2000 OC-3 endpoints.
Figure 2-5. DDM-2000 FiberReach Rings Single Homing to a DDM-2000 OC-12 Ring
DDM-2000
OC-3
Wire Center
OC-3c
DDM-2000
OC-12
OC-12
DDM-2000
OC-3
OC-3c
DS1/
EC-1
OC-1
IS-3 IS-3
Customer
Locations
DDM-2000
OC-12
DDM-2000
OC-12
Host
System
DS1/T1
DS1/T1
RT Site
DDM-2000
FiberReach
Wideband Shelf
DS1/T1
DDM-2000
FiberReach
Wideband Shelf
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