Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide

The PowerKEY CableCARD module complies with the OpenCable specification for a removable security device
that separates a retail cable device from a cable provider's  conditional access system.

A CableCARD module  inserts into a slot on a host device, such as a set-top or a digital cable-ready television.
Once inserted, the CableCARD module controls access to secure digital content so that authorized host devices
can receive this content according to the 

 for the program or event.

The host device, which can be purchased from a retail store or elsewhere, supplies all other basic tuning,
navigation, and video display capabilities. If the host device is capable of receiving clear digital content, and the
subscriber does not want to receive secure digital content, a CableCARD module is not required. However, if the
subscriber wants to receive secure digital content, a CableCARD module is required.

The CableCARD module uses the PowerKEY Conditional Access System in the same manner as an Explorer DHCT
to decrypt secure digital content. In fact, you authorize CableCARD modules for services in the same way that
you authorize Explorer DHCTs.

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