Lucent Technologies FiberReach DDM-2000 - Fiberreach Ring Dual Homing to a

363-206-305
Applications
2-14
Issue 3 June 2000
Integration with Dual Wire Center Applications
2
The survivability and networking benefits of Lucent’s dual ring interworking
solution are cost-effectively extended to smaller locations via DDM-2000
FiberReach dual-homing capabilities. Figure 2-7 shows an OC-3 feeder ring from
duplicated wire centers, with dual-homed DDM-2000 FiberReach extensions from
selected feeder ring remote sites.
The host nodes and remote DDM-2000 FiberReach systems are configured just
like the previously described dual-homing configuration with single 0x1 cross-
connections (ring 0x1 low-speed interface) employed by the host. In the dual wire
center architecture, the access network is also protected from a catastrophic
failure of one wire center, because the access and interoffice networks have
duplicate points of interworking. The DDM-2000 OC-3 systems in the two wire
centers employ the drop and continue cross-connection. (For more details on the
dual wire center application, see LTP 363-206-200,
DDM-2000 Multiplexer
Application, Planning, and Ordering Guide.)
Figure 2-7. DDM-2000 FiberReach Ring Dual Homing to a DDM-2000 OC-3 Ring in a
Dual Wire Center Application
RT Sites
OC-3
DDM-2000
OC-3
OC-1
Access
System
SLC -2000
Customer Locations
DDM-2000
OC-3
EC-1
EC-1
DACS IV-
2000
FT-2000
Wire Center #1
DDM-2000
OC-3
EC-1
EC-1
DACS IV-
2000
FT-2000
Wire Center #2
OC-48
Interoffice
Ring
DS1/T1
DDM-2000
FiberReach
Wideband Shelf
DS1/T1
DDM-2000
FiberReach
Wideband Shelf
R