Dear friend!
Generally, the rated voltage of the OLT is:
DC power supply: –48 V/–60 V
AC power supply: 110 V/220 V
When a communications equipment room is constructed, a UPS power system (including the DC and AC power systems) is needed to install. The UPS has the voltage regulator function.
If not, please install a voltage regulator that meets the OLT input voltage requirement.
Thank you!