Nortel Meridian 1 option 11C Planning And Installation Manual page 122

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The AC-powered version requires a non-switched dedicated power outlet
installed within 6 ft (1830 mm) of each cabinet, with:
• one non-switched dedicated outlet per cabinet with:
— Voltage: Recommended 100 to 240 volts
Maximum limits 90 and 250 volts
Single phase
— Frequency: 50 or 60 Hz
— Power (I/P Max): 750VA
Refer to "Commercial power requirements" on page 43 for detailed
information about power requirements.
Wait at least five minutes after power to the unit is switched off before
removing the unit from the cabinet. Make sure that the power cord and
battery backup connection (if equipped) are both disconnected.
The NTDK78 ac/dc power supply cannot power up on battery alone. If
the NTDK78 is powered down while operating on DC reserve power,
then AC power is required to power up.
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Figure 37 on page 121
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