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The Common Interface (CI) is the slot on a digital television receiver into which a conditional access module (CAM) may be inserted for satellite television. Receivers normally have two common interfaces. A receiver with a common interface allows the user to access encrypted television broadcasts as opposed to free-to-air (FTA) channels. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... Digital television (DTV) is a telecommunication system for broadcasting and receiving moving pictures and sound by means of digital signals, in contrast to analog signals used by analog (traditional) TV. DTV uses digital modulation data, which is digitally compressed and requires decoding by a specially designed television set, or a... In radio terminology, a receiver is an electronic circuit that receives a radio signal from an antenna and decodes the signal for use as sound, pictures, navigational-position information, etc. ... A conditional access module (CAM) is an electronic device, usually incorporating a slot for a smart card, which equips a DVB television or set-top box with the appropriate hardware facility to view conditional access content that has been encrypted using a conditional access system. ... Artists impression of a Boeing 601 satellite, as configured for digital television transmission by SES Astra Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television. ... Free-to-air is a phrase used to describe television and radio broadcasts which are available without subscription and without decryption (pay-TV). ...

See also

• Free-to-view

Free-to-view (FTV) is a term used in the United Kingdom for certain television channels on the Sky Digital satellite platform which require a working VideoGuard receiver and viewing card to decrypt the signals, but do not require any form of continual subscription. ...

External links

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common interface

• LinuxTV entry for common interface

CI (Common Interface) also allows you to type the keys in the through Viaccess option, so without buying a subsription card, you can receive the encrypted channels by registering their keys in your receiver. Image File history File links Commons-logo. ...

The most popular CI receivers so far approved by home-users is the SuperMax 6000 CI Receiver.