closed-circuit television

/K L OW1 Z D S ER0 K AH0 T EH0 L AH0 V IH0 ZH AH0 N/
noun
  1. 1

    A system of television cameras, connected by cable to a control room, used for surveillance.

Synonyms

Source: https://en.wiktionary.org/wiki/closed-circuit%20television