Reference document

Wireless BLOS Static Narrowband Transmission Services
The Wireless Beyond Line of Sight (BLOS) Static Narrowband Transmission Services support the wireless transfer of data amongst two or more static nodes Beyond Line of Sight (LOS) of each other, employing modulated Radio Frequency (RF) carriers in different frequency bands, and employing narrowband low capacity wireless terminals operating in the VLF and HF (sky wave propagation) frequency band, or narrowband SATCOM operating in the VHF, UHF and SHF frequency bands and L band (1 to 2 GHz) and X band (8 to 12 GHz). Examples of Wireless BLOS Static Narrowband Transmission Services are Single and Multichannel VLF and LF ON-Line and On-Line and Off-Line OOK Systems, Single Channel HF Radio Equipment, Slow Hop HF EPM Communications Systems, Tactical Data Exchange (Link11/Link 11B), UHF Demand Assigned Multiple Access (DAMA), Super High Frequency (SHF) Military Satellite Communications (MILSATCOM), Iridium satellite phone communications, and Inmarsat satellite services.
Wireless BLOS Static Transmission Services