HF Voice MF/HF 1.6 to 26.5 3 kHz Current Long Regional Mobile to General Long MHz and voice. mobile. distance, International (ALE) Fixed to mobile. > 250 nm Mobile to fixed. Narrow MF & 1.6 to 26.5 0.5 kHz Current Long for Text Mobile to General text Long band HF. MHz mobile. distance, direct Fixed to mobile. > 250 nm printing. Short for Mobile to fixed. (NBDP) general HF Data MF/HF 1.6 to 26.5 0.5 3 kHz Current Long Regional Digital Fixed to mobile. General data Long – MHz and data. Mobile to fixed. distance, International > 250 nm VHF voice VHF 156.025 to 25 kHz Current Long international Voice Mobile to General voice Line of 161.950 MHz mobile. sight Fixed to mobile. Mobile to fixed. VHF data VHF 156.025 - 25 kHz Current Long regional data Mobile to General data Line of 161.950 MHz mobile. Fixed to mobile. Mobile to fixed. Satellite UHF Tx 1626.5 - Current Long global Digital. Satellite General voice Global Satellite 1646.5 MHz 3rd and data. to earth. and data coverage Rx 1525.0 - party Earth to communication. 1545.0 MHz satellite. GSM UHF Current Long regional Digital. Cellular. General Medium range GSM UHF 3rd Voice voice in locality and and data data. GPRS UHF Current Long regional Digital. Cellular. General Short range in GPRS UHF 3rd Voice voice locality party and and data data.
HF Voice MF/HF 1.6 to 26.5 MHz 3 kHz Current Long Regional and International voice. (ALE) Mobile to mobile. Fixed to mobile. Mobile to fixed. General Long distance, > 250 nm Narrow band direct printing. (NBDP) MF & HF. 1.6 to 26.5 MHz 0.5 kHz Current Long for Short for general Text Mobile to mobile. Fixed to mobile. Mobile to fixed. General text Long distance, > 250 nm HF Data MF/HF 1.6 to 26.5 MHz 0.5 – 3 kHz Current Long Regional and International Digital data. Fixed to mobile. Mobile to fixed. General data Long distance, > 250 nm VHF voice VHF 156.025 to 161.950 MHz 25 kHz Current Long international Voice Mobile to mobile. Fixed to mobile. Mobile to fixed. General voice Line of sight VHF data VHF 156.025 - 161.950 MHz 25 kHz Current Long regional data Mobile to mobile. Fixed to mobile. Mobile to fixed. General data Line of Satellite UHF Tx 1626.5 - 1646.5 MHz Rx 1525.0 - 1545.0 MHz Current Long global 3rd party Digital. and data. Satellite to earth. Earth to satellite. General voice and data communication. Global coverage Satellite GSM UHF Current Long regional 3rd Digital. Voice and data. Cellular. General voice and data Medium range in locality GSM UHF GPRS UHF Current Long regional 3rd party Digital. Voice and data. Cellular. General voice and data Short range in locality GPRS UHF