52 en | Connection Plena Voice Alarm System
9922 141 1037x (V2.16) | V0.6 | 2011.09 Installation and Operation manual Bosch Security Systems B.V.
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.
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).
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