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3GPP (CT4)
TS 03.90














Unstructured Supplementary Service Data (USSD)

(P) GSM Rel-98 v7.0.0    1999/06    33 p.
(P) GSM Rel-97 v6.0.0    1998/10    33 p.
(P) GSM Rel-96 v5.0.0    1996/10    35 p.
(P) GSM Phase-2 v4.1.1    1995/08    36 p.

Rapporteur:  GAY, Emmanuel
Descendant(s):  TS 23.090    
See also:  USSD-related TS/TR    

This TS gives the stage 2 description of Unstructured Supplementary Service Data (USSD).

The unstructured supplementary service data (USSD) mechanism allows the Mobile Station (MS) user and a PLMN operator defined application to communicate in a way which is transparent to the MS and to intermediate network entities. The mechanism allows development of PLMN specific supplementary services.