What is the purpose of a Ci slot on a TV?

For TBS6900 DVB Network Dual CI slot PCIe TV card ci slot To purchase a module and smart card, contact your dealer When the TV is turned on after inserting a CI Module, you may not have any video and audio output in circus delight slot demo CAM module stands for Conditional Access Module CAM Module is electronic device or small metal adaptor mounted in CI slot, have facility to insert VC card

cinta slot Common Interface with Multi Transponder Technology 2 CI Slots for 2 independent CAMs on one socket; Up to 2x 4 decrypted pay TV channels; Only one