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Applications
2-22 Issue 1 December 1997
OC-3 Linear Optical Extensions from OC-3 and
OC-12 Rings 2
An additional topological flexibility offered by the DDM-2000 OC-3 and OC-12
Multiplexers is 1+1 protected linear OC-3 and IS-3 optical extensions from OC-3
and OC-12 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. As Figure 2-13 shows, an access provider can
use linear optical extensions from an OC-12 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 they require for high service availability. If enabled, full
single-ended operations are available on all network elements (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 or OC-12 ring.
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