Q.2957.1 : Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call : User-to-user signalling (UUS)

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Q.2957.1 : Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call : User-to-user signalling (UUS)

Recommendation Q.2957.1

Modified by ITU-T Q.2971 (10/1995).

In force components
Number	Title	Status
Q.2957.1 (02/95)	Stage 3 description for additional information transfer supplementary services using B-ISDN digital subscriber signalling system No. 2 (DSS2) - Basic call : User-to-user signalling (UUS) Modified by ITU-T Q.2971 (10/1995)	In force
Q.2957.1 (1995) Amendment 1 (12/99)		In force