NA 022
DKE German Commission for Electrical, Electronic & Information Technologies of DIN and VDE
DIN ETS 300057 [CURRENT] references following documents:
| Document number | Edition | Title |
|---|---|---|
| ETS 300056 | 1991-10 | Integrated Services Digital Network (ISDN); Call waiting (CW) supplementary service; service description More |
| ETS 300140 | 1992-05 | Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; functional capabilities and information flows More |
| ITU-T I.130 | 1988-11 | Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN More |
