Bosch Security Systems | 2004-06 | 9922 141 10371en
Plena Voice Alarm System | Installation and Operating | Configuration en | 51
5.4.3 VOX volume control
The volume of the VOX input is set with the VOX
volume control knob (see figure 5.6).
5.4.4 Vox
If the Vox switch (see figure 5.1) is in the ON position,
the mic/line input with VOX functionality is activated
when the voltage signal level of the input source rises
above the threshold level. If the Vox switch is in the OFF
position, the behavior depends on the connection of a
VOX switch:
• If a VOX switch is not connected, the mic/line input
is disabled.
• If a VOX switch is connected, the mic/line input is
activated when the VOX Switch trigger input is closed
(see also section 3.13).
5.4.5 Speech filter
If the Speech filter switch is in the ON position, a speech
filter is activated for the VOX input. The speech filter
improves the intelligibility of speech, by cutting off the
lower frequencies. Using the speech filter is only then
useful if the input source is a microphone. If the input
source is not a microphone, leave the switch in the OFF
position.
5.4.6 Phantom power
If the Phantom power switch is in the ON position, a
24 V DC phantom power supply to the VOX
microphone is activated. The phantom power only has
to be used if the VOX microphone requires a phantom
power. If the input source is not a microphone or if the
microphone does not accept phantom power, leave the
switch in the OFF position.
5.5 Call station configuration DIP
switch
The call stations are configured using the configuration
DIP switch at the bottom of a call station (see figure 5.7).
5.5.1 Call station ID
The ID of a call station is set using switches 1 to 4.
Maximum 8 call stations can be connected to the
controller. Each CS should be assigned a unique ID
(1 - 8). Set the switches in the correct positions, refer to
table 5.7.
figure 5.6: VOX input volume control knob
Phantom power
Vox
Speech filter
Off
On
Mic/Line
figure 5.7: Call station configuration DIP switch
table 5.6: DIP switch settings
DIP switch Description
1, 2, 3, 4 The ID of the call station. See
section 5.5.1.
5, 6 The sensitivity of the call station. See
section 5.5.2.
7 Switches the speech filter on (ON)
or off (OFF). See section 5.5.3.
8 Switches termination on (ON) or off
(OFF). See section 5.5.4.
table 5.7: Call station ID settings
ID Switch 1 Switch 2 Switch 3 Switch 4
1 OFF OFF OFF OFF
2 OFF OFF OFF OFF
3 OFF OFF OFF OFF
4 OFF OFF OFF OFF
5 OFF OFF OFF OFF
6 OFF OFF OFF OFF
7 OFF OFF OFF OFF
8 OFF OFF OFF OFF
ON
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