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The Receive Input meter displays the dB level of the incoming telco signal prior to any signal processing.
NOTE: All meters in Console are peak-level meters.
NC Button
Clicking the Noise Cancellation button opens the Channel Property Configuration: Telco RX window with the
NC tab selected, allowing you to configure noise cancellation settings.
To use noise cancellation, click Enable Noise Canceller, then adjust the Cancellation Depth to the setting which
provides the best combination of low noise and maximum speech clarity for your installation. The attenuation depth
can be set in 1dB increments from 6dB to 15dB. The default is 6dB. The noise canceller default is Off.
Clear Effect Button
To reduce bandwidth requirements, telephone lines limit audio bandwidth to a range of 300Hz–3.3kHz. ClearEffect
enhances the incoming signal from a telephone line to emulate wideband audio by adding high and low frequencies
to the audio signal.
Click the ClearEffect button to toggle this feature on and off. The default is On.
ALC Button
Clicking the Automatic Level Control button toggles ALC on and off. ALC provides auto-leveling for all conference
call participants on the telco rx line, keeping soft and loud participants at a consistent level. The default is Off. See
AGC/ALC for additional information.
NOM Button
Maintains a constant output level by automatically adjusting gain levels based on the number of mics gated on
and routed to the selected output channel. NOM reduces the output level proportionally by 3dB for every doubling
in the number of open mics. When using NOM over the expansion bus, only I – R Buses support passing NOM
information. The default is On.
Mute Button
Clicking the Mute button toggles muting for the telco receive channel. The default is Off.
Gain Slider