Mic/Line Input With Vox - Bosch Plena Voice Alarm System Installation And Operation Manual

52 en | Connection
5.1.9

Mic/line input with VOX

The voice alarm controller has 1 mic/line input with voice-activated (VOX) functionality (see
Figure 5.12). This input has 2 sockets; a balanced XLR socket and a balanced 6.3 mm jack
socket. The signals from both sockets are mixed to form a single input signal.
Figure 5.12 Mic/line input with VOX functionality
The input automatically starts a business or emergency call if the input is higher than -20 dB
(100 mV for line and 100 mV for microphone inputs) or if the VOX switch is closed (see
Figure 5.13). The input must be configured with the configuration software.
NOTICE!
See the Configuration Software Manual (9922 141 1038x) for more information about the
configuration software.
Figure 5.13 Connecting a VOX switch
For example, the mic/line input with VOX functionality can be used to create a supervised link
to another emergency sound system (e.g. a Praesideo system).
9922 141 1037x (V2.16) | V0.6 | 2011.09
p
Calibration
GND
L
Mic/Lin
R
PC
1 2 3 4 5 6
1 2 3 4 5 6
VOX Switch
Installation and Operation manual
24V
DC out
Plena Voice Alarm System
Bosch Security Systems B.V.