Which option correctly describes two types of transmitters and receivers used in alarm systems?

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Multiple Choice

Which option correctly describes two types of transmitters and receivers used in alarm systems?

Explanation:
The key idea is how monitored alarm systems send signals from the protected site to a central monitoring station. In this setup, the digital alarm communicator transmitter (the device at the premises) converts and sends alarm data, while the digital alarm communicator receiver (the device at the central station) receives and decodes that data. Together, they form the standard transmit/receive pairing that enables remote monitoring. The other options describe sensing devices or power and infrastructure components rather than the dedicated transmitter/receiver pair used for monitoring.

The key idea is how monitored alarm systems send signals from the protected site to a central monitoring station. In this setup, the digital alarm communicator transmitter (the device at the premises) converts and sends alarm data, while the digital alarm communicator receiver (the device at the central station) receives and decodes that data. Together, they form the standard transmit/receive pairing that enables remote monitoring. The other options describe sensing devices or power and infrastructure components rather than the dedicated transmitter/receiver pair used for monitoring.

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