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Applications
2-34 Issue 3 June 2001
OC-3/OC-12 Linear Optical Extensions from
OC-3, OC-12, and FT-2000 Rings 2
An additional topological flexibility offered by the DDM-2000 OC-3 and OC-12
Multiplexers is 1+1 protected or unprotected linear OC-3 and IS-3 optical
extensions from OC-3, OC-12, and FT-2000 rings. Using this capability, the DDM-
2000 OC-3 and OC-12 Multiplexers can support many of the new network
configurations desired in the evolving loop feeder environment. An access
provider can use linear optical extensions from an OC-12 or FT-2000 ring to
provide OC-3/OC-3c signals directly to end users. This gives the end users the
bandwidth they need for large bandwidth applications, such as video, and
provides it to them via the path switched ring architecture. Full single-ended
operations are available on all NEs. This gives the end user full control of
performance monitoring (PM) data, network reconfigurations, and provisioning of
the network.
OC-3 optical extensions can also be used to interconnect SONET subnetworks.
Examples include interconnection of two access networks and interconnection
between access and interoffice rings. Optical extensions can be used to
interconnect OC-3 and OC-12 ring subnetworks to an OC-3 terminal, OC-3 and
OC-12 add/drop networks, and another OC-3, OC-12,or FT-2000 ring.
The DDM-2000 OC-3 Release 15.0 allows the Main OC-3/OC-12 ring interface on
the DDM-2000 OC-3 shelf to support “identical” DCC data link mode. This will
allow an OC-3 shelf to interconnect through its Main ring interface to an OC-N 1+1
interface on another NE(Function Unit of host NE). The user must provision the
remote (hosted) OC-3 NE for “identical” DCC mode on the Main interfaces. Only
protected OC-3 interfaces are supported. This allows a TARP extension using
Release 15.0 ring software.
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