Preparing For Upgrade; Power Supply Precautions - Nokia MetroSite Field Upgrade Manual

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2

Preparing for upgrade

Before starting any upgrade procedures, the procedures and precautions presented
in this chapter should be read and implemented as required.
WARNING
Some of the upgrade procedures require the BTS to be powered down. Read
Section 2.1, Power supply precautions, in this chapter before beginning the
upgrade.
2.1

Power supply precautions

WARNING
Potentially lethal voltages!
The BTS power must be switched OFF at the main disconnect device or
circuit breaker before starting maintenance work which involves the risk of
electric shocks.
Prevent injury to personnel or damage to the BTS equipment by following the
power supply rules for maintenance and upgrade procedures presented in Table .
Note
The switch on the power supply unit (PSU) of the BTS has two positions: ON and
Stand-by.
DN00187365 © Nokia Corporation
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Preparing for upgrade
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