Multi-Link The Stick Voice/Fax/Modem Call Processor - Manual (Page 34)

INPUT POWER REQUIREMENTS-
At AC Transformer: 110-125 Volts AC Only, 50-60 Hz
At Power Jack On Stick: 12-14 Volts AC and DC
POWER CONSUMPTION- 6.2 Watts
CO INTERFACE-
Ringer Equivalence Number: 0.5 B
Input Ring Detection: 40-150 Volts AC, 15-68 Hz
DEVICE INTERFACE-
Battery: -48 Volts Nominal DC To All Devices
Off-Hook Detection: 3-80 mA
Ring Generator Frequency: 30 Hz (+/- ..1) Hz Voltage Regulated
and Current Limited
Waveform: True Sinusoidal
Ringing No Load: Approx. 82.8 Volts RMS AC
Ringing 8000 Ohm Impedance (REN 1.0): Approx. 8 1.6 Volts RMS AC
Ringing 4000 Ohm Impedance (REN 2.0): Approx. 73.0 Volts RMS AC
Ringing 2667 Ohm Impedance (REN 3.0): Approx. 64.5 Volts RMS AC
Ringing 2000 Ohm Impedance (REN 4.0):
Approx. 55.0 Volts RMS AC
Ringing 1800 Ohm Impedance (REN 5.0): Approx. 49.5 Volts RMS AC