| Generic service descriptions for ten supplementary services defined in I.250-Series Recommendations |
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| Citation: |
https://handle.itu.int/11.1002/1000/4454 |
| Series title: |
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| Approval date: |
1998-03-09 |
| Approval process: | Agreed |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 13 |
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Further details: |
Patent statement(s)
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| Title |
Approved on |
Download |
|
ISDN field trial guidelines
|
1991
|
here
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