Checking Warnings And Cautions - Nokia MetroSite Field Upgrade Manual

Table 1.
BTS upgrade or maintenance
procedure
Replacing a power supply unit or PSU
cable
Replacing a grounding connection
Disconnecting or connecting antenna or
diversity cables on a TRX
Replacing a TRX
Disconnecting or connecting
transmission cables
Replacing a transmission unit
Connecting or disconnecting cables to
the interface unit (VIFA)
Connecting cables to the interface unit
for BTS chaining
Replacing an interface unit
Replacing a fan unit
2.2

Checking warnings and cautions

The warnings and cautions applicable to the MetroSite BTSs are detailed in Nokia
MetroSite EDGE Base Station: Warnings and Cautions. Read these before
beginning a field upgrade.
14 (50) © Nokia Corporation
Nokia Proprietary and Confidential
All manuals and user guides at all-guides.com
Power supply rules during BTS upgrade or maintenance
procedures
Draft
Power supply rule for BTS
• Power OFF at main disconnect
device
• PSU switch to Stand-by
• Power OFF at main disconnect
device
• PSU switch to Stand-by
PSU can be switched to ON but TRX
must be blocked
PSU can be switched ON but TRX must
be blocked
PSU can be switched ON but TRX must
be blocked
PSU switch to Stand-by
PSU switch to Stand-by is advised
PSU switch to Stand-by
PSU switch to Stand-by
• Power OFF at main disconnect
device
• PSU switch to Stand-by
Field Upgrade
DN00187365
Issue 2-0 en