closed-circuit television

US /ˌkloʊzd ˌsɝː.kɪt ˈtel.ə.vɪʒ.ən/
UK /ˌkloʊzd ˌsɝː.kɪt ˈtel.ə.vɪʒ.ən/
"closed-circuit television" picture
1.

Videoüberwachung, CCTV

a television system in which the signal is not publicly broadcast but is distributed to a limited number of receivers, used for surveillance and security purposes

:
The bank uses closed-circuit television to monitor its premises 24/7.
Die Bank nutzt Videoüberwachung, um ihre Räumlichkeiten rund um die Uhr zu überwachen.
Security cameras are part of a larger closed-circuit television system.
Überwachungskameras sind Teil eines größeren Videoüberwachungssystems.