DMG 3200/3100/3000 – User Manual
Page 261 (306)
Services
Services currently running on that particular module
Status
The status of the module – whether it is logged into the main MMI or the
Twin MMI module.
Switching Delay
Once the QAM output module meets the described conditions to log in
to the Twin MMI automatically, it still needs to wait a determined period
of time. This switching delay is the number of seconds for the module to
switch connections from one backplane to another. Once the switch
delay time is reached, the module will switch backplanes. If the login
succeeds and the input signal is correct, the video and sound will be
back on the screen.
The minimum value allowed for Switching Delay is:
• QAM/COFDM output fixed 15 seconds
The default value is 15 seconds. If needed, the same module can have
different Switching Delay values for each backplane. This parameter
can be modified in the MMI even if the module is connected to another
backplane.
Manual
This Switch button enables the operator to perform a manual switch
from the GUI. When internal redundancy is enabled, this button will be
available. The module will switch right after the operator clicks the
button – without any Switching Delay.
Reboot
The QAM Output modules are designed to log into the first available MMI board. They will
always try to login to the Main MMI board first, which is connected to default backplane. But
only during the boot process, if login fails through the default backplane, it will try to connect to
the backup even if internal redundancy is disabled in order to find a MMI to login to.
For the Twin MMI to work properly, it is essential that both MMI modules have
an IP connection.
10.2.4 QAM/COFDM/IP/ASI Output Internal Redundancy
When using QAM,COFDM , IP or ASI Output with internal redundancy the switching will be
triggered with the following alarms/events:
• No signal
• No contact with MMI module
If all services configured for the output card stop receiving data, the No Signal alarm will be
raised and the internal redundancy module will switch backplanes. This means that even if the
services configured are not enabled to the output signal of the card, it will switch.
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