Configuration manual for 2N IP intercoms
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Default audio input– set the default audio input (microphone, line input or audio module
input) to be used for phone calls and audio streaming.
Microphone input gain–set the microphone input gain.
Line input gain–set the line input gain independently of the microphone gain value.
Acoustic feedback filter–set automatic suppression of acoustic feedback (typically
whistling) between the intercom speaker and phone handset if located in close proximity
to the intercom. This mode is disabled by default.
Tip
Only at 2N
®
SIP Speaker Horn, 2N
®
IP Audio Kit and 2N
®
IP Video Kit is possible to
configure microphone gain.
The microphone/line input gain setting is connected with the input signal level and type of
external microphone installation. The wide gain range (0 to 39dB for a microphone input
and −6dB to 24dB for a line input) should be sufficient for most installations. Set a value to
ensure good audibility and eliminate excessive acoustic feedback at high loudspeaker
volumes with subsequent signal saturation on the microphone/line input and thus acoustic
echo cancellation (AEC) deterioration.
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