DIN ETS 300139
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
active, Most Current
| Organization: | DIN |
| Publication Date: | 1 December 1992 |
| Status: | active |
| Page Count: | 18 |
| ICS Code (Integrated Services Digital Network (ISDN)): | 33.080 |
Document History
DIN ETS 300139
December 1, 1992
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
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