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Board
OptiX OSN 3500 TM - SD
2-3
Unit
Subordinate board
Function
Power input unit
PIU
Access power supply and
protect the equipment
against abnormal power.
System auxiliary
interface board
AUX
The System provides various
maintenance interfaces, such
as RS-232 and orderwire
phone interface.
Fan unit
FAN
Facilitate the system in heat
dissipation.