Cisco GoQAM Installation And Operation Manual page 19

System Overview
Overlay Environment With a MUX
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 multiplexer
followed by an MPS. The MPS performs Mediacipher Encryption and may perform
QAM modulation, depending upon the specific device.
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
Services.
4004834 Rev D 3