Sencore DMG 3000, User Manual

Page: 285 / 306

DMG 3200/3100/3000 – User Manual
Page 285 (306)
10.6 Conditional Access (CA) Redundancy
The unit supports CA redundancy, in other words, ECMG and EMMG redundancy. The
difference between ECMG and EMMG redundancy is that ECMG redundancy is actively
controlled by the unit, whereas EMMG redundancy is simply allowing for multiple EMMG IP
addresses to connect to the same port.
10.6.1 ECMG Redundancy
ECMG redundancy involves two ECMGs: one Main and the other Backup. If the connection to
the Main ECMG is lost, the multiplexer will automatically switch to the Backup ECMG based on
the configuration defined in the GUI.
ECMs cannot be defined specifically for the Backup ECMG; instead they are automatically
generated according to those defined for the Main ECMG.
In terms of alarms :
When the connection to the Main ECMG is lost, a warning alarm will be displayed in the GUI.
When the multiplexer switches to the Backup ECMG, the earlier warning alarm disappears; it is
replaced with another alarm indicating that a switch has occurred.
Connection to the Backup ECMG is only established at the time of switching. In other words, if
the Backup ECMG fails while the Main ECMG is still running, no alarm will be triggered.
Switching between the Main ECMG and Backup ECMG does not affect the
service as the CW will not be changed in the stream until a new ECM is received
from the ECMG.
10.6.2 Redundancy Configuration
A redundancy rule for ECMGs can be defined from the Redundancy

CA tab in the
Navigation Pane . Insert appropriate values here and click Add .
Before defining the rule, it is necessary to define the Main ECMG from Conditional Access

SCS

ECMG .