AT&T DEFINITY 7100 series Manual de usuario Pagina 91

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POWER UNITS
POWER UNITS
631DA1 Power Unit
Provides +5 volt DC 60-amp power on the backplane on the control
carrier and the port carriers.
631DB1 Power Unit
Provides -48 volt DC 8-amp and -5 volt 6-amp power on the back-
planes of the carriers.
644A1 Power Unit
Provides +5 volt DC 60-amp power on the backplane on the control
carrier and the port carriers of -48 volt DC powered cabinets.
645B1 Power Unit
Provides -48 volt DC 8-amp and -5 volt DC 6-amp power on the
backplanes of the carriers of -48 volt DC powered cabinets.
The control carrier contains one 645B Power Unit to power both the
control and port circuit packs.
WP-91153 L3 Power Supply
Provides +5 volt DC power, -5 volt DC power, -48 volt DC power,
+12 volt DC power, ringing voltage, and battery charge voltage for
single-carrier cabinets.
Provides circuit breakers and EMI filtering.
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