Service manual

100 Trinix NXT — Installation and Service Manual
Section 2 — Planning Guide
TRX-NXT-256x256
Recommended Protected path ranges for TRX-NXT-256x256 routers are as
follows:
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 sec-
ondary (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 TRX-
NXT-256x256. That is, 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 TRX-NXT-256x256, it is not possible to arrange completely indepen-
dent paths, that is, paths that use different power supplies. Protected path
configuration for TRX-NXT-256x256 routers provides redundancy for matrix
boards and input and output boards only.
The maximum number of Protected paths for a TRX-NXT-256x256 router is
128.
A more detailed example is shown in Table 8. 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.
The numbers shown here correspond to the connector numbers used
during router configuration (but not, in most cases, to the actual silk screen
Table 7. Recommended Protected Path Ranges
Primary Path Secondary Path
Out In Out In
1-128 1-128 129-256 129-256
Table 8. TRX-NXT-256x256 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