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5.8 Volume control of headphone and
internal speaker of CU
1) While using internal speaker or headphone to monitor
the discussion, turning the monitor volume control to
adjust the volume of them.
2) The maximum volume level is controlled by the speaker
volume control of CU
5.9 Using a headphone
1) Connecting the headphones to the left and/or right side
of the units.
2) Inserting a headphone jack will mute the loudspeaker.
3) Adjusting the volume of the headphones by using the
rotary volume control.
4) The maximum volume level depends on the level of the
speaker volume control on the CU.
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