The term "dBm" stands for decibel-milliwatts, which is a unit of level used to indicate that a power level is expressed in decibels (dB) with reference to one milliwatt (mW)
. It is used in various fields such as radio, microwave, fiber-optical communication networks, and wireless technology to measure absolute power levels
. For example, in the context of cell phone signal strength, a strong signal is around -70 dBm or higher, while a weak signal is around -100 dBm or lower
. The dBm is an absolute unit, always relative to 1mW, and is used to define signal strength in wires, cables, and radio and audio frequencies
