Cisco Headend System Release 2.5 Mode D'Emploi
4004831 Rev B
Overlay Technology
1-5
Differences Between a DBDS and an Overlay Environment,
Continued
Overlay Environment with a MUX
In an Overlay environment with a MUX, the Modular Processing System (MPS) does
In an Overlay environment with a MUX, the Modular Processing System (MPS) does
the encryption for the non-Cisco set-tops. The following graphics illustrate how
Overlay technology interfaces to a non-Cisco headend that uses a MUX followed by
an MPS. The MPS performs Mediacipher Encryption and may perform QAM
modulation, depending upon the specific device.
Example 1:
Example 1:
Example 2:
Note: The MPS is being replaced by the SmartStream Encryptor Modulator (SEM).
As with the MPS, a number of different options are available for interfacing Overlay
technology with the SEM. Specific details can be obtained by contacting Cisco.