cable guard

基本解释

The raft of second screen apps have poured in from the likes of cable providers, television networks, movie houses, start-ups and even old guards such as Yahoo.
ENGADGET: The state of the second screen: Will TV companion apps proliferate or dwindle?
From the entrance to the cable car at the foot of the mountain to the slopes at the top, security guards and volunteers checked credentials every step of the way.
NPR: Russia To Increase Security At Athletics Event