Setting The Contrast; Setting The Volume - Nortel Meridian SL-100 Reference Manual

Each field in the time and date may be changed independently of the other
fields. To select a field, press the volume control toggle key to the left or
right, and scroll to the desired field. When a field is selected, it flashes. The
valid input characters are displayed in the upper left. To change a selected
field, type in the appropriate digits.
To exit the Time and Date screen but remain in the Program mode, press P.
To return to the idle state, press the Rls key.

Setting the contrast

After selecting Option 3, the Contrast Adjustment screen displays. This
screen allows the user to adjust the contrast of the display.
The volume control toggle key increases or decreases the contrast ratio. At
minimum contrast, no asterisks are displayed. Asterisks are added as
contrast increases and deleted as contrast decreases. At maximum, eight
asterisks display. As the asterisks appear or disappear from the display, the
actual contrast of the screen also changes.
To exit the Contrast Adjustment screen, press P to return to the Program
mode or Rls to return to the idle state.

Setting the volume

After selecting option 4, the Volume Adjustment screen appears.
Meridian SuperNode MSL-100 Meridian Modular Telephones Reference Manual MSL11
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