Lucent Technologies FiberReach DDM-2000 - Hairpin Local Drop Routing

363-206-305
Applications
2-24
Issue 3 June 2000
Hairpin Local Drop Routing
2
Figure 2-16 shows a hairpin local drop routing. This routing option establishes
path-protection switched drop cross-connections between channels on an OC-1
ring and ports/channels on DS1/EC1/OC-3 circuit packs. (See Figure 2-16.) The
OC-1 facility terminates on a pair of 27G2-U OLIU circuit packs in the Function
Unit slots. These connections are just like the drop cross-connections that can be
established between channels on a ring terminating on the Main slots and port or
channels in a Function Unit. This allows traffic to be routed from a FiberReach
node on an OC-1 ring to a local drop without using bandwidth on the
OC-3/OC-12 ring.
NOTE:
For a step-by-step provisioning example, refer to the “Hairpin Local Drop
Routing Example” section in Chapter 8.
Figure 2-16. Hairpin Local Drop Routing
OC-3/OC-12
CENTRAL OFFICE
DS1/EC-1/IS-3/OC-3
OC-1
DS1/EC-1/
IS-3/OC-3
tpa 850281/01
DS1
DDM-2000
FiberReach
Wideband Shelf
DDM-2000
FiberReach
Wideband Shelf
RT HOST NODE
R
DDM-2000/
SLC -2000
Access System
RT HOST NODE
DDM-2000/
SLC
-2000
Access System
DDM-2000/
SLC
-2000
Access System