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Chapter 13 Encryption and Scrambling
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Event Information Scheduler
The EIS is the functional unit in the CA System that holds the schedule,
configuration, and other information required for the complete CA system.
To start a scrambling event, the EIS provides the SCS with a SCG provisioning
message. The message contains a list of services and/or elementary streams that
must be scrambled at the same time with the same CW and a list with ECM groups
for which ECMs must be generated. An ECM group contains the necessary
information, like Super_Cas_ID, ECM_ID, and AC, to bind an ECM stream to a CA
provider.
To stop a scrambling event, the EIS sends a SCG provisioning message update to the
SCS. The ECM group for the event of which scrambling must be stopped is removed
from the SCG provisioning message. The following illustration shows a SCG
provisioning message.
Содержание RF Gateway 1 Modules
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