Paradyne COMSPHERE 3550 Series, User Manual

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Application Configurations
E-3 3550-A2-GB20-40 July 1999
Multipoint Applications
Model 3550 and Model 3551 DSUs also provide
high-speed multipoint circuit support. The network can be
controlled from the DSU’s control panel or a 6700 Series
NMS. Figure E-2 shows sample multipoint
configurations.
Using this application, backup is provided via modems
rather than a DBM. In this case, a matrix switch at the
control site switches data from the FEP ports to the
modems.
On the tributary side of the configurations, either
standalone Model 3550 DSUs equipped with DBMs or
connected to an external DBU are shown.
Figure E-2. Multipoint Application Configurations