DResearch – User Manual TeleObserver MR3140
2011-02-03
52
4
Relevant comments on the daily operation
The following relates to the use of the system in everyday life. Please note, that failure to comply with
the instructions can really shorten the life of the system and/or individual components. In the worst
case it can lead to irreparable damage, which is not covered by the warranty or guarantee.
4.1
Power supply and shutdown of the systems
It is important to ensure that the system is connected to a continuous power supply with correct value.
Voltage fluctuations have to be intercepted by appropriate measures (e.g. UPS). Switching on and off
is only allowed through the ignition contact or the key switch. Via this ignition signal the system is
controlled booted up and shut down and so it saves data integrity and the full operational readiness.
The system must never switched off by hard shutdown. This shortens the lifetime of the disk and
leads to damage. Furthermore it is possible that hard shutdown leads to inconsistent data,
because the archive structures could get damaged.
Especially in the case of retrofitting of railed vehicles there is often the problem that no ignition signal
is available. An appropriate boot up and shutdown signal (i.e. ignition) signal has to be provided. The
technical staff has to be informed that the system has to be shut down controlled through a main
switch before they shut down the vehicle and all its systems. Only then the main switch can be
operated.
4.2
Hold-back time of the permanent recordings versus data privacy
During the permanent recordings the system automatically draws up an internal new archive for each
camera at every full hour. Determine in the configuration how long the recordings in the ring archives
shall be hold back at least (factory-set not added). A value of 48-72 hours as hold-back time for the
records in the ring archives is usual. Synchronous data privacy requires in the most European
countries, that the permanent recordings must not hold-back for more than 48 hours. It is obvious that
these requirements are in conflict with each other.
The above made setting "Limit the size of permanent recordings to:" = 48 hours guarantees, that no
video data are available which are older than 48 hours. The priority of data privacy is higher, which
leads to automatic deletion of the oldest sequences from the 47
th
hours. So there are no full 48 hours
in the ring archives – but perhaps only 47,xx hours!
