Home > categories > Electrical Equipment & Supplies > Control Cables > When the cable company installs cable TV, how do they limit channels to only what you ordered?
Question:

When the cable company installs cable TV, how do they limit channels to only what you ordered?

I ordered basic digital cable from my local cable company (Comcast). I was just wondering when they come out to install it, how will they limit my channels to just the ones in the basic package? Do they handle this at the head-end, or is it done at the junction box outside my apartment? Do they install some kind of filter on the line? And if so do you suppose the installer comes out with other filters in his truck? Just curious, of course.

Answer:

With digital cable, the access is controlled by your cable box. Everything is broadcast, and the head end periodically decides whether that particular box is authorized to decode that channel. If so, the box is authorized for another epoch. With analog cable, many years ago they would put a filter in at the connection sometimes.
the box on the outside of your house receives signals from the cable line and blocks access to other channels
With digital they can transmit any single channel with analog they have to install filters in the line at your place of residence.
the installer doesnt block anything comcast does the block whatever channels you didnt sign up for

Share to: