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Version 6.0
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NovaTec
Mobile Gateway S20
5.1.2
Status displays on the CCU-3
The CCU-3 status display allows you to follow the individual diagnosis steps during the
booting phase on commencing operational mode. You can also see when the system is in
default mode due to missing configurations. Thus, you can recognize all possible stages of
operation by observing the light emitting diodes on the CCU-3. (see also Picture 36)
Upon connecting the NovaTec
S20 to the main supply, the system undertakes a processor test
followed by a RAM- and firmware test. When there is a valid configuration, the system then
moves into operational mode. In cases where there is no configuration, the system starts up in
the default configuration (Power-LED is off). This means that only the first two BRA interfaces
and the first PRA interface of the CCU-3 is being activated. The operational mode “boot monitor
active” can only be activated by a service technician using a PC connected to the V.24/RS232
interface of the CCU in the NovaTec
S20.
If the NovaTec
S20 starts in the default configuration, a valid configuration must be transmitted
through downloading. Downloading can be undertaken either locally, via the V.24, ISDN
interfaces or IP, or remotely via the public telecommunications network. After downloading is
completed, the system resets itself and starts up using the previously transmitted configuration.
At the first commissioning, the system commences with a test configuration that is used by the
supplier as a quality control check. For this reason it is imperative that the download procedure
is undertaken
.
If a modified configuration is being transmitted during the running operation, the level of
changes will determine whether or not the system undertakes a restart. As a precaution,
you should undertake the download procedure at a time that avoids high levels of data
transmission activity because connections will be interrupted should the system require a
restart.
After the boot process the status of each individual line interface of CCU-3 is displayed
by the status of the LED. If the layer one of an interface is activated, the appropriate LED
turns steady on. In case the layer one of the interface is deactivated so the LED turns off.
The CCU-3 contains two plug in space for one daughter board and an ethernet interface.
The LED status of the CCU is dependent of the daughter board placed and configured into
it. The following table shows the status and the meaning of the LEDs of the CCU in normal
mode (non default mode):
