NSG 9000-6G - Harmonic Inc
NSG 9000-6G - Harmonic Inc NSG 9000-6G - Harmonic Inc
Chapter 5 Conditional Access System (CAS) Defining Global CAS Parameters • Crypto Period (CP) - indicates (in seconds) how often the NSG 9000 generates a new CW. • Access Criteria (ACC) - a permission to access the service. The ECMG generates an ECM stream that is sent to the NSG 9000 and is added to the TS. 5.1.2 Privacy Mode Scrambling Overview Privacy Mode is a real-time encryption method which was developed by Motorola and licensed to Harmonic for VOD applications. Privacy Mode requires an MCT machine which serves as the Privacy Mode ERS proxy as the following illustration shows: Remote ERS ECM request (VOD) MCT (ERS Proxy ECM Update ECM Update NSGs When using Privacy Mode scrambling, the only additional configuration that is required within the NSG web client is to enable CAS and to set the behavior upon ECM expiration. However, Privacy Mode also requires an MCT machine which serves as the Privacy Mode ERS proxy. For information on how to configure Privacy Mode parameters in MCT, refer to the MCT User's Guide. 5.2 Defining Global CAS Parameters To set global CAS parameters, do the following: 1. Select Applications > CAS. The following tab opens. © 2012 Harmonic Inc. 102 NSG 9000-6G, Version 2.7, Rev B
Chapter 5 Conditional Access System (CAS) Defining DVB Scrambling Parameters 2. In CAS Properties, open the Encryption Mode (DVB\PM) list and select either of the following: DVB Scrambling - an encryption mode for the DVB protocol. Privacy Mode Scrambling - an encryption mode developed by Motorola Inc. 3. To enable CAS, select the CAS Enable box. The fields of the selected encryption mode are enabled. 5.3 Defining DVB Scrambling Parameters Once you selected the DVB Scrambling mode, and enabled the CAS, move to the DVB Settings section and do the following: 1. In CP Duration (Sec), enter the required value. By default it is 15 seconds. The Crypto Period defines how often the NSG changes the control word (or "key") for encrypted services. Valid values range between 1-6554. 2. In ECMG Failover Retries, define the number of times the NSG 9000 unit tries to establish communication with the Entitlement Control Message Generator (ECMG) before issuing the alarm ECMG Connection Failure. 3. In CA Descriptor Location, select a location in the PMT for the CA descriptor. The CA descriptor may appear either in a service or elementary level or in both levels. 4. Open the DVB Scrambling Mode box and select either of the following: Session based - the EIS is external and it issues an SCG for each service for which encryption is required. When selected, the DVB Session based features are enabled. Tier based - all services are scrambled with the same control word and ECM and there is no external EIS. Once selected, the DVB Tier Based features are enabled. © 2012 Harmonic Inc. 103 NSG 9000-6G, Version 2.7, Rev B
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Chapter 5 Conditional Access System (CAS)<br />
Defining Global CAS Parameters<br />
• Crypto Period (CP) - indicates (in seconds) how often the <strong>NSG</strong> <strong>9000</strong> generates a new CW.<br />
• Access Criteria (ACC) - a permission to access the service.<br />
The ECMG generates an ECM stream that is sent to the <strong>NSG</strong> <strong>9000</strong> and is added to the TS.<br />
5.1.2 Privacy Mode Scrambling Overview<br />
Privacy Mode is a real-time encryption method which was developed by Motorola and<br />
licensed to <strong>Harmonic</strong> for VOD applications. Privacy Mode requires an MCT machine which<br />
serves as the Privacy Mode ERS proxy as the following illustration shows:<br />
Remote ERS<br />
ECM request (VOD)<br />
MCT (ERS<br />
Proxy<br />
ECM Update<br />
ECM Update<br />
<strong>NSG</strong>s<br />
When using Privacy Mode scrambling, the only additional configuration that is required within<br />
the <strong>NSG</strong> web client is to enable CAS and to set the behavior upon ECM expiration. However,<br />
Privacy Mode also requires an MCT machine which serves as the Privacy Mode ERS proxy.<br />
For information on how to configure Privacy Mode parameters in MCT, refer to the MCT User's<br />
Guide.<br />
5.2 Defining Global CAS Parameters<br />
<br />
To set global CAS parameters, do the following:<br />
1. Select Applications > CAS. The following tab opens.<br />
© 2012 <strong>Harmonic</strong> <strong>Inc</strong>. 102 <strong>NSG</strong> <strong>9000</strong>-<strong>6G</strong>, Version 2.7, Rev B
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