Instruction manual

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Basic Setting > Audio
 Basic Setting > Audio > Device Audio Setting > Audio
There are five kinds of the audio mode to user: Full duplex, half duplex, simplex microphone only,
simplex amplifier only and audio off.
Mode:
Full duplex Allow using a microphone and amplifier at the same time, or turning them off.
Half duplex Allow using a microphone or amplifier by manual switch.
Simplex microphone only Allow using the microphone only.
Simplex amplifier only Allow using the speaker only.
Audio off Turns audio off; i.e. both the microphone and speaker are off.
Audio Source:
Select the audio channel to set the codec by each channel or all channels, and the Audio Source
means the LINE IN device.
 Basic Setting > Audio > Device Audio Setting > Audio In
There are three kinds of the audio codec to user: G711a, G711u and G726/32K. Select the audio
codec to use it for audio encryption.
 Basic Setting > Audio > Device Audio Setting > Audio Out
There are three kinds of the audio codec to user: G711a, G711u and G726/32K. Select the audio
codec to use it for audio decryption.
Code Compression Bitrates (Kbit/s) Note
G711a 64 PCM (For American System)
G711u 64 PCM (For European System)
G726/32K 32 ADPCM
 Basic Setting > Audio > Device Audio Setting > Mic Input
The audio channel will integrate the package of LINE IN and MIC IN. If the selection is the audio 1,
the channel 1 will provide the LINE IN and MIC IN audio in the same time.
Audio transfer mode
Audio encryption format
Audio decryption format