Phoenix Audio Technologies DUET VCA - Manual (Page 23)

Setting up the telephone’s output gain:
The Duet Executive has a two-slide, four-position input
gain switch that controls the level (sensitivity) of the Duet’s
output audio signal going into your telephone. If the gain is
set too high, the telephone input will clip the signal and the
Duet will fail to cancel the “line echo”. As a result you may
hear an echo returning when you speak. If the gain is set
too low, the other side may have trouble hearing you or
won’t be able to hear you at all. The unit’s factory setting is
at a low gain, which will work well with most telephones. If you get complaints that the volume of
your voice is too low, increase the gain as much as necessary until you start getting echo. Please
use the following table for reference.
Headset / Headphone connection:
The Duet is equipped with a 2.5mm standard telephone / cellular phone headset connector.
Connecting a headset to the Duet will automatically disable the Duet’s internal built-in speaker and
microphone. Your PC’s sounds (music, VoIP communication, etc) will be converted into mono and
sent to the headset’s earphone together with the audio signal received by the telephone. The
headset connection is useful when you want to conduct a high quality private conversation using a
standard telephone / cellular phone headset.
- 23 – Phoenix Audio Technologies www.phnxaudio.com