Meridian Nortel 1 Option 11C Technical Reference Manual page 278

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553-3011-100 Standard 14.00
M2317 Telephone
The data option power supply connector plugs into the back of the telephone
next to the RS-232-C interface connector. Data option installation requires
the removal of the telephone power supply connector.
The NPS50220-03L5 power supply meets the following specifications:
AC input voltage: 105 - 132 V AC
Input line frequency: 57 - 63 Hz
Operating temperature: 0° to 50°C (32° to 122°F)
Operating humidity: 5% to 95% non-condensing
Storage temperature: -40° to 70°C(-40° to 158°F)
Output voltages:
+5 V DC at 1.0 A
-12 V DC at 200 mA
+12 V DC at 200 mA
Case dimensions: 178 x 102 x 76 mm (7 x 4 x 3 in.)
The NPS50220-03L5 is equipped with an internal thermal and short circuit
protection.
Whenever the external power supply fails (due to failure of the power utility),
the M2317 Telephone assumes Plain Ordinary Telephone Service (POTS)
status. At this time the telephone is capable of receiving and originating calls
on the prime DN, and of giving the usual alerting tones (ringing). It will not
support the Display screen, softkeys, feature keys, Handsfree, or data
facilities while in POTS status.
January 2002