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: Q.87.1 |
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| Q.87.1�:�Stage 2 description for additional information transfer supplementary services : User-to-user signalling (UUS)
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| In force components |
Number
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Title |
Status |
Q.87.1 (03/93)
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Stage 2 description for additional information transfer supplementary services : User-to-user signalling (UUS)
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In force
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| Superseded and Withdrawn components |
Number
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Title |
Status |
Q.87.1 (11/88)
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Stage 2 description for additional information transfer supplementary services : ISDN User-to-user signalling
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Superseded
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