ETSI TS 100 392-3-2
ETSI TS 100 392-3-2
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 2: Additional Network Feature Individual Call (ANF-ISIIC)
standard published 10/01/2000 by European Telecommunications Standards Institute