ETSI PRETS 300 396-3-1996 Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) Protocol
1997ETSI PRETS 300 396-3-1997 Terrestrial Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) Protocol
1996ETSI PRETS 300 396-3-1996 Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA); Technical Requirements for Direct Mode Operation (DMO); Part 3: Mobile Station to Mobile Station (MS-MS) Air Interface (AI) Protocol