ITU-T I.253.2
Call Hold (Study Group I) 10 pp
active, Most Current
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| Organization: | ITU-T |
| Publication Date: | 1 August 1992 |
| Status: | active |
| Page Count: | 10 |
Document History
ITU-T I.253.2
August 1, 1992
Call Hold (Study Group I) 10 pp
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