363-206-305
Applications
Issue 3 June 2000
2-21
OC-1 Ring Pass-Through
2
This enhanced routing option establishes pass-through cross-connections for
channels on an OC-1 ring terminating on a pair of 27G2-U OLIUs in the Function
Units of a DDM OC-3. This application must use a pair of 27G2-U OLIUs in the
function units slots. (See Figure 2-13.) These cross-connections are just like the
pass-through cross-connections that can be provisioned for rings terminating on
Main slots. This allows traffic to be routed from one FiberReach node to another
FiberReach node on the same OC-1 ring without using bandwidth on the OC-3/
OC-12 ring.
NOTE:
For a step-by-step provisioning example, refer to the “OC-1 Ring Pass-
Through Example” section in Chapter 8.
Figure 2-13. OC-1 Ring Pass-Through in a Function Unit
RT HOST NODE
OC-3/OC-12
RT HOST NODE
CENTRAL OFFICE
DS1/EC-1/IS-3/OC-3
OC-1
DS1/T1
DS1/T1
tpa 850279/01
DDM-2000
FiberReach
Wideband Shelf
DDM-2000
FiberReach
Wideband Shelf
DDM-2000/
SLC
-2000
Access System
R
DDM-2000/
SLC
-2000
Access System
DDM-2000/
SLC
-2000
Access System
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