ETSI - ETS 300 139
Integrated Services Digital Network (ISDN); Call Hold (HOLD) Supplementary Service Service Description
active, Most Current
| Organization: | ETSI |
| Publication Date: | 1 January 1992 |
| Status: | active |
| Page Count: | 15 |
Document History
ETS 300 139
January 1, 1992
Integrated Services Digital Network (ISDN); Call Hold (HOLD) Supplementary Service Service Description
A description is not available for this item.
January 1, 1991
Integrated Services Digital Network (ISDN); Call Hold (HOLD) Supplementary Service Service Description
This standard defines the stage one of the Call Hold (HOLD) supplementary service for the pan-European Integrated Services Digital Network (ISDN) as provided by European public telecommunications...