Why is it called closed-circuit television monitoring system? Are there any other TV monitoring systems? For example, open circuit, etc., what is the difference between them?
What is the television signal monitoring system, not to spread outside the TV signal is not connected to the TV monitoring system is a closed, independent system, TV equipment within this system is unable to receive the signal of the system.
At present, the television monitoring system is basically closed (closed) system is the network TV monitoring system closed-circuit television monitoring system to open, but to enter the network TV monitoring system need to register the name and password is not open TV monitoring system.
Closed-circuit television monitoring system is a few years ago to open the wireless television system (wireless television system as long as the signal can receive TV programs, and closed-circuit television (cable) system must be received on the cable system to receive TV programs).
