Private Telecommunication Network (PTN); signalling protocol at the S-reference point; identification supplementary services; English version ETS 300191:1992
Edition 1993-09

Private Integrated Services Network (PISN) - Cordless Terminal Mobility (CTM) - Call handling additional network features; service description; English version ETS 300694:1996
Edition 1996-12

Private Integrated Services Network (PISN) - Cordless Terminal Mobility (CTM) - Location handling services; service description; English version ETS 300691:1996
Edition 1996-12

Radio Equipment and Systems (RES) - Trans-European Trunked Radio (TETRA); Voice plus Data (V+D) - Part 10: Supplementary services stage 1; Part 10-15: Transfer of control; English version ETS 300392-10-15:1996
Edition 1997-09