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| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.040.30 : Switching and signalling systems 95 |
| Replace | ITU-T D.50 (2008-10) |
| Modified by | ITU-T D.50 Supplement 2 (2013-05) ITU-T D.50 Supplement 1 (2011-04) |
| Year | 2011 |
| Document history | ITU-T D.50 (2011-04) |
| Country | International |
| Keyword | CCITT D.50;ITU-T 50;50;ITU-T D.50 |