Specifications

1217B AC power supply
Issue 6 February 2007 213
1217B AC power supply
Note:
Note: This power supply is no longer sold.
A 1217B power supply is used only with an SCC1 Media Gateway. This power supply provides
additional protection in the event of an overload. An overload triggers a power supply alarm, but
the system’s cooling fans continue to run, and the power supply continues to function. This
power supply replaces the WP-91153 L3 and L4-25 and is fully backward compatible.
This power-factor-corrected supply accepts 50- or 60-Hz AC input, while auto-ranging between
90- and 264-VAC input. This multiple-output power supply provides regulated DC outputs and
AC ringer outputs that are switch-selectable 20- or 25-Hz AC. The 1217B power supply meets
the:
● Harmonic-distortion requirements of IEC1000-3-2 (PFC)
● Immunity requirements of IEC 1000-4
● Safety requirements of IEC 950
● Current UL requirements and CSA requirements
The 1217B power supply mounts in a carrier’s power supply slot. A power cord with a
three-prong plug on one end connects the supply to a dedicated AC power source.
631DA1 AC power unit
Note:
Note: This power unit is no longer sold.
A 631DA1 power unit accepts 60-Hz, 120-VAC input power. The unit provides +5V DC power
and up to 60A for the carrier backplanes of an MCC1 Media Gateway.
If AC input power fails, the power unit can convert 144 VDC from optional batteries in an
AC power-distribution unit to +5 VDC. A circuit in the optional battery charger detects the higher
equivalent (AC- or DC-input) voltage and changes to the correct input voltage.