In narrowband radio , the nominal 3-kHz bandwidth allocated for single channel radio that provides a transmission path for analog and quasi-analog signals. ( 188 )
NARROWBAND RADIO VOICE FREQUENCY (NBRVF)
Meaning of NARROWBAND RADIO VOICE FREQUENCY (NBRVF) in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012