Standard telegraph level
In telecommunication, standard telegraph level is the power per individual telegraph channel required to yield the standard composite data level.
For example, for a composite data level of -13 dBm at 0-dBm transmission level point, the STL would be approximately -25 dBm for a 16-channel VFCT terminal computed from STL = -, where n is the number of telegraph channels and the STL is in dBm.
