ITU-T - I.251
Number Identification Supplementary Services - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 28 pp
inactive, Most Current
| Organization: | ITU-T |
| Publication Date: | 1 January 1989 |
| Status: | inactive |
| Page Count: | 28 |
Document History
I.251
January 1, 1989
Number Identification Supplementary Services - Integrated Services Digital Network (ISDN) - General Structure and Service Capabilities (Study Group XVIII) 28 pp
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