Clear-Com CellCom Battery Pack Charger - Manual (Page 57)

Clear-Com Communication Systems
CellCom V2.0.3 Instruction Manual
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The VOX gate allows the user to set limits to the audio that will be
passed from the party-line to the basestation mixer; by setting the VOX
level at the correct level the user can cut the audio reflections (which
cause the echo) from the party-line when a wireless beltpack user
speaks. This is achieved when the VOX level is set above the audio
level of the reflections, thus allowing a party-line user’s voice to pass
through the VOX gate in the basestation mixer but the VOX gate will
reject the audio reflections.
Note: If both the party-line user and the CellCom user speak at the
same time, the CellCom user may hear the echo as the
audio reflections piggy back the party-line audio.
Figure 4-3: VOX Gate Setting Examples
Note: If the CellCom beltpack users shouts or increases the
microphone gain into the beltpack the echo might return if
the audio reflects are above the VOX gate level.
Auto null the Party-Line channel at the Basestation
Party-lines connected to the base station can be auto nulled by first
enabling party-line channel by pressing the party-line button on the
front of the basestation.
The auto nulling is then activated by pressing and holding the enable
party-line button; the base station will go then into a auto null routine.