Bosch Praesideo 4.0 - Инструкция (Страница 58)

Praesideo 4.0 en | 68
Bosch Security Systems B.V. IUI-PRAESIDEO_4.0 | V1.0 | 2013.01 Installation and User Instructions
Clause / Requirement Compliance Signature
12 Emergency microphone(s) (option with
requirements)
The VACIE may have provision for emergency
microphone(s). In this case the emergency
microphone(s) shall have
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.
a priority over all inputs, including pre-recorded
messages,
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.
b an emergency microphone control to open the
microphone channel, at access level 2,
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.
c where 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
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.
d when the emergency microphone control is operated,
any audible indication that might interfere with the
use of the microphone shall be automatically muted.
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.