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E N G L I S H
I.3.2 Power ON/OFF Switch (5)
Although the unit will return to standby mode automatically after each
extended period of inactivity, you will still want to turn it off when not
in use for a prolonged period of time to extend battery life. Turning
off the unit does not affect normal telephone communication through
the handset, so you can answer or make phone calls through the
handset as usual.
I.3.1 External DC Supply Jack (1)
The unit provides the choice of
using an optional external DC
supply instead of batteries.
When purchasing an AC adapter,
make sure the output polarity
(+/- voltage) matches the unit.
And the voltage should be between
6V DC to 9V DC.
I.3.3 Rotary Transmit Volume Control
The amplifier allows you to adjust the volume of the outgoing sound
volume, and the high and low frequencies associated with it. To fine-tune
the transmission volume, place a call and talk as usual using the headset.
Slowly rotate the Rotary Transmit Volume Control (6) with the small
screwdriver pin provided until the desired level is reached. The person
talking to you should be able to tell you when the optimum sound and
tone level is reached. Once this is set, there should be no need to make
further adjustments in the future. (See illustration next page)
CAUTION: Be careful when you adjust the volume control, as rotating
the volume to the maximum setting may cause headset to "squeal".
Reduce the volume and the "squealing" will disappear, but continuous
over-turning of the control may cause damage to the unit.
