Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Applications
Issue 3 June 2001
2-33
Dual Homing with DRI 2
The survivability and networking benefits of Lucent's DRI solution are cost-
effectively extended to smaller locations via DDM-2000 FiberReach dual-homing
capabilities. Figure 2-21 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 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.
Figure 2-21. DDM-2000 FiberReach Ring Dual Homing to a DDM-2000 OC-3 Ring in a Dual
Wire Center Application
DDM-2000
FiberReach
DDM-2000
FiberReach
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
DS1/T1

Lucent Technologies DDM-2000 OC-3 Specifications

General

Brand	Lucent Technologies
Model	DDM-2000 OC-3
Category	Multiplexer
Language	English