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Bosch Security Systems | 2011-02
2011-02 | Installation and User Instructions | 5 | Call Stations en | 257
23 PRS-CRF Call Stacker
23.1 Introduction
The Call Stacker is a small unit that records specific
calls that cannot be send to all required zones because
some are occupied by a higher priority call. The unit
can store up to 16 calls in high-quality format with a
maximum of three minutes for each call, including
chimes and pre-recorded messages. Playback of a call
can start while it is still being recorded. The unit can
record and/or playback up to eight calls simultaneously.
More units can be added to a system in order to
increase the number of recordable calls. Units can be
connected to the Praesideo network at any place.
The call stacker can also be used as time shifter to avoid
acoustic feedback from a loudspeaker to the active
microphone. The call is recorded and broadcast after
the recording has finished. The call can be
pre-monitored before broadcast with the option to
cancel the call. Time shifting and call stacking can be
combined.
Logging of the call and all its playbacks is supported,
but the recorded calls do not survive a power down and
are not supervised, so the call stacker function should
not be relied upon for emergency calls.
figure 23.1: Block diagram
Fault Power
Network
Processor
Message Manager
POF
Network
Redundancy
Switching
Message Recorder
(8x)
Message Player
(8x)
POF