363-206-285
Transmission and Synchronization Interfaces
5-20 Issue 3 June 2001
OC-3/OC-1 Ring (0x1) 5
The OC-3/OC-1 path switched ring is similar to the OC-3/OC-12 ring-on-ring. A
DDM-2000 FiberReach shelf interconnects with a DDM-2000 OC-3 ring host shelf
through 0x1 provisioned low-speed OC-1 interfaces on a single OC-3 ring shelf.
VT/STS path protection switching is done on the DDM-2000 FiberReach shelf.
In single homing, the DDM-2000 FiberReach ring interconnects through the ring
interfacewiththelow-speedOC-10x1interfaceonasingleOC-3shelf.
In dual homing, the OC-1 ring interconnects with the OC-1 0x1 interfaces on two
separate and normally non-colocated OC-3 shelves. Different function unit slots
on the two shelves must be used to connect the OC-1 ring. For example, function
unit C2 on one shelf and function unit C1 on the other shelf (see Figure 5-12 and
Figure 5-13).
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