Connection on a television or a set top box which can be used to connect to any other device using the same open standard.

Describes a hard and software architecture for Conditional Access Systems whereby the generic "host" set-top-box is not dedicated to one particular encryption system. Consumers use detachable modules, which allow them to receive encrypted services they pay subscription fee for. The interface between host set top box and module is standardised (PCMCIA-Interface) so that the same set top box can be used to handle a variety of encryption systems.

Describes a conditional access system architecture whereby the generic "host" set-top box is not tied to a particular encryption system, components of the latter residing in a detachable "module" made available by a pay TV broadcaster to its subscribers. The interface between host and module is standardised so that the same set-top box can be used to handle a variety of encryption systems. An opposite approach is called Simulcrypt.

Allows connection of additional equipment for upgrades and servicing