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Battery:
Green — ONT is operating normally. BBU
is on standby.
Yellow — Battery is either recharging or
conducting a self-test, or the BBU is
providing power to the ONT.
Red — Battery is low. When this light comes
on, approximately two hours of talk time
remain.
Replace Battery:
Red — Battery needs to be replaced.
Auxiliary (currently not available):
Green — Auxiliary Battery Pack (ABP) is connected to the BBU.
Off — No ABP is connected.
BBU Audible Alarms:
Listening to help you troubleshoot
Your BBU is also equipped with an audible alarm to inform you of
problems with your BBU. The alarm sounds for two seconds and then
is silent for 58 seconds. The conditions listed below are the potential
reasons for the audible alarm. You can use the alarm in combination
with the indicator lights to resolve your BBU issue.
Low Battery — Alarm is silenced if the battery voltage goes above 12V
(electrical power has returned), the battery is fully discharged or the
battery is removed from the BBU.
Foreign Voltage — Alarm is silenced once the foreign voltage has
been properly removed.
Replace Battery — Alarm is silenced when the battery is removed.
Overcurrent — Alarm is silenced once the overcurrent has been
properly removed.