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Applications
2-32 Issue 1 December 1997
STS-3c Video Broadcast Application 2
Video applications are becoming increasingly more important in the competitive home
entertainment industry. The DDM-2000 OC-12 Multiplexer can be the backbone for
video distribution needs as it supports two STS-3c video cross-connection types:
■ COV - Video cross-connections at central offices
■ RTV - Video cross-connections at remote terminals
Figure 2-20 shows the video broadcast application for the DDM-2000 OC-12
Multiplexer. In this application, incoming STS-3c signals at a "head-end" (cross-
connection type COV) OC-12 shelf are simultaneously dropped at any number of
remote OC-12 terminals (cross-connection type RTV). This provides the capability of
simultaneously transmitting up to eight STS-3c video feeds (using both slots of fn-A/B/C
and D, when equipped with OC-3 or IS-3 interfaces) to remote sites.
Significant features of this application are:
■ Both inner and outer rings (mb1 and mb2) distribute up to four STS-3c
unprotected one-way signals. These signals are then connected to OC-3 or IS-3
circuit packs.
■ The STS-3c signals can be provisioned in pairs (two, four, six, or eight) and
unused time slots can be used for other ring applications.
Figure 2-20. STS-3c Video Broadcast Application
Maximum Capacity =
8 STS-3c Signals
OC-12
OC-12
OC-12
OC-12
RTV
RTV
RTV
OC-12 OC-12
OC-12
Note: Low speed interface
can be OC-3 or IS-3.
Fn-x-2
Fn-x-1
Fn-x-1Fn-x-2
Fn-x-1 Fn-x-2
Fn-x-2
Fn-x-1
mb2
mb1
mb1
mb2
mb2
mb2
mb1
mb1
Head-End (COV)
OC-12
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