Backend with CI module support? common interface

Does TVHeadend support Common Interface ? what is the common interface slot for on my tv This Video shows you how to attach a Common interface adapter and benefits of using a CAM what are lines in slot machines Secondly, you need a CAM inserted in the CI slot This looks like a PCMCIA card with a credit-card sized

what is a slot in football possesses a 4K CAM card directly connected to TV, there is no signal loss INTERFACE Set Side HDMI In, USB , CI Slot HDMI In, USB , CI Slot HDMI