Lucent Technologies DDM-2000 OC-3 User Manual

363-206-285
Applications
Issue 3 June 2001
2-39
OC-1 Ring Hairpin Routing, Dual-Homed 2
With this routing option, shown in Figure 2-25, cross-connections are established
between channels on two separate OC-1 facilities that terminate on 27G2-U OLIU
circuit packs in either the same or different function units. In the dual-homed
arrangement, only one rotation of each of the two OC-1 rings terminates on a
single OC-3 shelf. At the OC-3 shelf, there may be a single 27G2-U OLIU that
terminates both rings or a 27G2-U OLIU in each of two function units that
terminates the rings. The other rotation of each ring terminates on a different
OC-3 shelf. This allows traffic to be routed from one FiberReach node on one
OC-1 ring to any other FiberReach node on another OC-1 ring without using
bandwidth on the OC-3/OC-12 ring.
Figure 2-25. Dual-Homed Hairpin Routing
RT HOST NODE
DDM-2000/
OC-3/OC-12
SLC
R
-2000
RT HOST NODE
DDM-2000/
SLC
R
-2000
DDM-2000/
SLC
R
-2000
CENTRAL OFFICE
DS1/EC-1/IS-3/OC-3
DDM-2000
FiberReach
DDM-2000
FiberReach
OC-1
DS1/T1
DS1/T1

Lucent Technologies DDM-2000 OC-3 Specifications

General

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