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Power Influence (PI):
Noise measured between ground and the tip and ring
conductors shorted together. Not heard by the
subscriber, the power influence affects the amount of
noise metallic the subscriber hears. The same as
noise-to-ground (Ng), measured in dBrnC.
REG:
Range Extender with Gain (loop treatment) boosts
C.O. battery voltage and amplifies AC speech signal.
Ringers:
The ringer circuit of a subscriber telephone set, wired
tip, wired ring, or bridged. Measured in tenths of a
ringer, allows identification of nonstandard equipment.
Slope:
The rate of change in attenuation relative to
frequency of a transmission line.
Step Tone:
A three - nine frequency tone generator used to
detect loading problems.