38 — CyberPower CyberShield CS 36 PSU/BBU unit data sheet
Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06 July 2008 38-3
3FE 51892 AAAA TCZZA Edition 01 ONT Product Information Manual
38.3 General description
The PSU converts ac power (50W, 48 V dc) to dc power (36 W, 12 V dc) to supply
the BBU. The BBU provides up to 8 h of backup battery power depending on
environmental conditions and load. The BBU charges the battery and sends the 36 W
of power (12.5 to 20 V dc) to the ONT. The BBU also provides an auxiliary power
connection that supplies 13.1 to 14.6 V dc in the event of a power outage that
depletes the backup battery. The auxiliary power connection supplies power to the
ONT but does not charge the battery. The BBU also supplies power and alarm
connections to the ONT.
Alarm outputs are available on the BBU to monitor the operational status of the
backup battery. The BBU indicates its status to the service personnel with LEDs and
to the ONT by a signal return connection. The ONT can communicate the BBU status
upstream to the P-OLT.
38.4 Status LEDs and user controls
Four indicator LEDs are present on the front of the BBU and one on the PSU. The
LEDs and with their meanings, are shown in Figure 38-1. The operating mode can
be determined by the state of these LEDs; see Table 38-2.
Figure 38-1 PSU/BBU LEDs and user control buttons
Table 38-2 LEDs and audible alarms
Alarm
Silence
Auxiliary
Power Source
Battery
Emergency Use
Replace Battery
Battery Power
System Status
Power OK
Protected
Alarm Silence
Battery emergency use
Replace battery
Auxiliary power source
Battery power
System status
Power
OK
Protected
LED
1914
Name Color Description Audible alarm
PSU LED
Power OK Green Normal operation —
Protected Green Protected from surge voltage —
(1 of 2)
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