Bosch Appliances 3.5 manual Clause / Requirement

Praesideo 3.5 Installation and User Instructions EN54-16: 2008

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Clause / Requirement

12Emergency microphone(s) (option with requirements)

The VACIE may have provision for emergency microphone(s). In this case the emergency microphone(s) shall have

apriority over all inputs, including pre-recorded messages,

ban emergency microphone control to open the microphone channel, at access level 2,

cwhere a pre-announcement attention drawing signal is provided, an indicator adjacent to the microphone shall show when the signal has finished and live speech can commence, and

dwhen the emergency microphone control is operated, any audible indication that might interfere with the use of the microphone shall be automatically muted.

Compliance Signature

The Praesideo system offers two types of emergency microphones with microphone supervision:

•a call station can be configured to be of class ‘emergency’ which makes the microphone of the call station an emergency microphone;

•if an audio input of the system is configured to the auxiliary microphone function, a connected microphone can act as emergency microphone.

The priority can be configured of a call stations’ ‘PTT’ key or audio input that is activated from a control input defined in a call macro. The emergency microphones must be configured to have priorities in the range 224 to 255 (highest). Higher priorities overrule lower priorities in case of resource or destination conflicts. Calls with the same priority operate on first come first serve basis, except in the case of priority 255: calls with the same priority 255 overrule each other, so the latest becomes active. This assures that high priority microphones that are left behind in an active state will never block the system.

Calls may contain pre-recorded messages. The prerecorded messages then adopt the priority of that call.

If the microphone of a call station is used as emergency microphone, the microphone channel can be opened via:

•the ‘PTT’ key of the call station

•a call station keypad key or call station kit input contact

If a microphone connected to an audio input is used as emergency microphone, the microphone channel can be opened via:

•a control input contact

•a call station keypad key

The actual way of operation is defined in the system and is subject to configuration.

A call station has a call status LED. This LED is blinking green when a pre-announcement attention signal or pre- recorded message is playing. The LED is steady green when the live speech can commence. Pre-announcement signals are also audible from the call stations’ monitor loudspeaker, to alert the experienced user about the progress.

For an emergency microphone connected to an audio input, under control of a control input contact, no such indicator exists; therefore such emergency microphones should only be configured for calls that do not have pre- announcement signals or messages.

The user interface of the Praesideo PC call station shows the call progress in a progress bar on the screen with clear indication when the speech can commence.

The monitor speaker of the call station is muted during the live speech phase. Other sources of interference should be minimized by proper installation, e.g. keep HVAC equipment and loudspeakers at a distance from the microphone.

The installer must use the priority mechanism of Praesideo for switching off non-relevant loudspeakers, either directly, if the loudspeakers are connected to the Praesideo system, or indirectly via control output contacts that interrupt an external system or audio path. Other audible indications, like audible fault warning or voice alarm indications, must be muted by configuring an output contact that is wired in series with the audible indications. .

If it is not possible to avoid interference from closely mounted loudspeakers receiving the call, the call stacking function of Praesideo allows for recording a call with delayed playback after the spoken announcement has finished.

Bosch Security Systems 2011-02