Installing Multiple Msa32, Msa8 Sparing Panels (Db15 Or Bnc) - Nortel Multiservice Switch 7400 Installation & Maintenance

Installing multiple MSA32, MSA8 sparing panels (DB15 or BNC)

Install multiple MSA32 or MSA8 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) and 8-port multi-service access (MSA8) 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 and MSA8 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 or MSA8 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 and MSA8 sparing panels with BNC or DB15
connectors (page 289). Also see the figures Location of MSA32 inter-
panel flexi-cable connectors for BNC and DB15 (page 290) and Location
of MSA8 inter-panel flexi-cable connectors for BNC and DB15 (page 291).
The PEC for the DB15 or BNC inter-panel flexi-cable is NTY199.
• The installation of one or more MSA32 or MSA8 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 246).
• Power is supplied to an MSA32 or MSA8 sparing panel from its FPs. The
2-slot version of an MSA32 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 MSA32 DS1 or E1 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.
• On the MSA8 FP, power to the sparing panel is provided from P1 into the
P3 sparing panel connection using an MSA8 one cable connector. For the
sparing panel to operate, the connector at P3 must be cabled at both ends
even if the port will not be configured in software.
• Follow
unit from damage by ESD or from transferring ESD to other hardware.
Copyright © 2005, Nortel
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Hardware procedures
Avoiding damage from static electricity (page 135)
Nortel Multiservice Switch 7400
Hardware Installation, Maintenance, and Upgrade
NN10600-175 7.1S1 Standard
PCR7.1 and up October 2005
to protect the
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