AVer FONE520, Руководство пользователя, Страница: 13 / 18

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Phone in jack: 3 options
– phone in, External microphone only and External
microphone mix in. Phone in is for mobile connection. External microphone means
only external microphone can receive and play the voice. External microphone mix
in means both external microphone and speakerphone (FONE520) can receive and
play the voice.
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Expansion mic mute: Individual means only external microphone is muted when
mute button is pressed. All means external microphone and speakerphone (FONE520)
both are muted when mute button is pressed.