356 Chapter 39 Hardware procedures
NN10600-175 6.1S2
Installing multiple MSA32 sparing panels (DB15 or BNC)
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.
• An MSA32 flexi-cable is an inter-panel connection cable that is
equivalent to a flexible printed circuit board (PCB). See the figure
“Inter-
panel flexi-cable for MSA32 sparing panels with BNC or DB15
connectors” (page 358). The PEC for the DB15 or BNC inter-panel flexi-
cable is NTY199.
• The installation of one or more MSA32 sparing panels in a series means
installing the panels first, then cabling the FPs and the network
equipment to the sparing panels. Ensure that you have installed all of the
FPs necessary for your sparing configuration. If you need to install
additional FPs, see the section
“Installing an FP” (page 321).
• 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.
•Follow “Avoiding damage from static electricity” (page 208) to protect
the unit from damage by ESD or from transferring ESD to other
hardware.
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