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3-2 Hardware installation
Hardware overview
DANGER
Power down the application module before
attempting any installations or upgrades.
If installing or upgrading an application module
(AM) in an existing Application Equipment
Module (AEM), ensure the AM is powered down
before beginning an installation or upgrade.
Failure to power down the AM may cause
unpredictable results.
If your upgrade is performed on an existing
system, follow the instructions contained in the
"NAC power-down procedure" chapter.
553-4011-110 Standard 1.0 November 1994
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