- References
In telecommunication, a narrowband modem is a modem whose modulated output signal has an essential frequency spectrum that is limited to that which can be wholly contained within, and faithfully transmitted through, a voice channel with a nominal 4 kHz bandwidth. Note: High frequency (HF) modems are limited to operation over a voice channel with a nominal 3 kHz bandwidth. References{{FS1037C MS188}}{{compu-network-stub}} 1 : Modems |