360 Chapter 39 Hardware procedures
NN10600-175 6.1S2
Installing multiple MSA32 sparing panels (RJ-45)
Install multiple MSA32 sparing panels for a one-for-n sparing configuration.
Prerequisites
• The one-for-n (formerly 1:n) configurations of 32-port multi-service
access (MSA32) sparing panels require one panel for each FP you want
to spare. For example, a one-for-four configuration requires four sparing
panels installed on the same face of a mounting apparatus, and connected
in series through inter-panel flexi-cables. This modular design of MSA32
sparing panels means any one of the sparing panels in a series can be
replaced without disrupting traffic on the FPs attached to the other panels
in the sparing configuration.
• When using two or more MSA32 sparing panels with RJ-45 connectors
(NTJS95) in a one-for-n sparing configuration, space is required between
the panels to accommodate inter-panel flexi-cables.
• An MSA32 inter-panel connection cable is a flexi-cable, a ribbon cable
that is equivalent to a flexible printed circuit board. Its product code is
NTJS99. The flexi-cables for MSA32 RJ-45 sparing panels are different
than other MSA32 panels by having a third D-sub connector. See the
figure
“Inter-panel flexi-cable for MSA32 sparing panels with RJ-45
connectors” (page 363).
• Since the flexi-cables are connected to the bottom of each sparing panel
down to the Main A (bottom) one, you must install the inter-panel flexi-
cables immediately after each panel is installed and before the next one
in the series is installed.
• Power is supplied to an MSA32 sparing panel from its FPs. The 2-slot
version of a DS1 or E1 MSA FP provides the power through the
connections labelled P3, and only through this connection. For the
sparing panel to operate with a 2-slot FP, the connectors at P3 must be
cabled at both ends even if the port will not be configured in software.
The 1-slot version of a DS1 or E1 MSA FP provides the power through
the connections labelled P0. For the sparing panel to operate with a 1-slot
FP, the connectors at P0 must be cabled at both ends even if the port will
not be configured in software.
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