Cisco Headend System Release 2.5 User Guide
4004831 Rev B
Overlay Technology
1-1
Chapter 1
Overlay Technology
Overview
Introduction
Cisco enhanced its DBDS technology to create a network in which different
conditional access (CA) systems can coexist on the same network in a coherent
manner. Cisco Overlay technology enables a PowerKEY
®
Overlay technology is both network architecture and software that provide a level of
interoperability between the DBDS and an incumbent network to ensure continued
and seamless delivery of digital broadcast and video–on–demand (VOD) services to
subscribers.
DBDS network to be
layered on top of an existing, but different, cable network.
This chapter provides an overview of the benefits and requirements for using
Overlay technology on your system.
In This Chapter
This chapter contains the following topics.
Topic
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