
DCN Next Generation Open Interface Release 2.4 Config Install and Database
en | 41
Bosch Communications Systems | 2007 February | SRS_SCSIINF | Du010934
Related functions
The related function in conjunction with the function described. It refers to other remote
functions and to related update notifications.
2.3 System Modes
To understand the SC and SI functions, one should have some knowledge on the behavior of
the CCU depending on the various so-called system modes. This section gives a brief,
although complete, description of these modes.
The CCU system as a whole is always running in one of the system modes. Each application
on the CCU has its own behavior in each system mode. The purpose of the system mode is
to have a clear division of functions and an easy way of separating them. It should be
impossible for instance to start the installation mode while the CCU is still booting, i.e. the
CCU is in the Init-mode.
The following system modes are used:
Init One time mode after start-up of the CCU. The CCU can
start with default data (defined as ‘cold start’), or with data
the last time used (so called ‘warm start’).
Config In this system mode the DCN NG configuration can be
changed, for instance installing units, assigning seat
numbers, assigning audio channels etc.
Congress This is the 'normal' system mode. In this mode most
applications will do their work, for instance starting a
voting round, turning on a microphone, interpreting etc.
Maintenance In this system mode the DCN NG system can be
maintained, for instance testing microphones, testing
audio channels, factory testing and equalization.
Download In this system mode new CCU software can be
downloaded.
Down One time system mode just before shutdown of the CCU.
Figure 1 below gives an overview of possible system mode changes.
Some remote functions are supported in more than one system mode, or in an other mode
than the congress system mode.
Init
Download Maintenance
Congress
Down
Config
Figure 1: CCU System modes
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