Planning Guide
64 Planning and Installation Manual
DV-33256
Recommended protected path ranges for DV-33256 routers are as fol-
lows:
For example, to protect an output in the range 1-128, choose a corre-
sponding input in the range 1-128; this will be the primary path. For the
secondary (failover) path, choose an output in the range 129-256 and a
corresponding input in the range 129-256.
This will provide the most independent possible paths through a DV-
33256, i.e., the primary path will use one set of input, matrix, and
output boards while the secondary path will use a different set of
boards.
CAUTION With a DV-33256, it isn’t possible to arrange completely independent
paths, i.e., paths that use different power supplies. Protected path con-
figuration for DV-33256 routers provides redundancy for matrix boards
and input and output boards only.
Note that for a DV-33256 router the maximum number of protected
paths is 128.
A more detailed example is shown in Table 7. This table shows a
sequential wiring scheme for a system yet to be installed or a system
where cables will be re-arranged in a symmetrical pattern in order to
simplify protected path operation.
Ta b l e 6.
Primary path Secondary path
Out In Out In
1-128 1-128 129-256 129-256
Table 7. DV-33256 protected paths (example of sequential numbering)
Primary path Secondary path
Out In Out In
Name No. Name No. Name No. Name No.
AirPP 1 MCPP 1 AirSP 129 MCSP 129
Sat1PP 2 StuAPP 2 Sat1SP 130 StuASP 130
Sat2PP 3 StuBPP 3 Sat2SP 131 StuBSP 131
.. ..
.. ..
.. ..
NetPP 128 MainPP 128 NetSP 256 MainSP 256
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