In telecommunications, falsing describes a decoder detecting a valid input when one isn't present. This is also known as a false decode. To make the concepts simpler, this article will discuss analog circuits used before digital signal processing. Examples of decoder falsing include: a telephone answering machine detecting dial pulses from a rotary dial as ringing voltage. The result being that the answering machine answers in response to dialing. a two-way radio with an enabled CTCSS decoder… (More on Falsing)