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Phone In Jack
Set Phone in input source.
Select Audio > Phone In Jack > Phone In, 3.5mm External Microphone Only, or 3.5mm External
Microphone Mix In.
Phone In: When the mobile phone is connecting to Phone in port, please select “Phone In” option.
3.5mm External Microphone Only: The speakerphone will transfer the sound
that it receives
from the external microphone (connected on phone in port) to far site.
3.5mm External Microphone Mix In: The speakerphone will transfer the sound that it receives
from the external microphone (connected on phone in port) and speakerphone to far site.