Telematrix Spectrum Plus SP300 User Manual page 31

Handset Volume Control
The Spectrum PLUS
with an ADA/FCC compliant handset
volume control located on the front of
the phone.
When the right end of the "VOLUME"
key is pressed, the volume of the
handset receiver is increased.
When the left end of the "VOLUME"
key is pressed, the volume of the
handset receiver is decreased.
The "VOLUME" key is an eight-step
volume control with the "1" setting
being OFF.
Volume Lock Feature — When the handset, speaker, or
headset volume feature is selected, the volume will
f
automatically stay at that setting in the next use.
TM
is equipped
31
Contrast
Volume