Conditional Access System (CAS) is used to charge the subscriber for subscribing fee by scrambling the program information.
有条件接收系统通过对节目信息进行加扰从而达到对用户收取收视费用。
Conditional Access System (CAS) is used to charge the subscriber for subscribing fee by scrambling the program information.
有条件接收系统通过对节目信息进行加扰从而达到对用户收取收视费用。
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