Table of Contents

Foreword
1 Scope
2 Normative References
3 Definitions and abbreviations
4 Cross phase compatibility
5 Network initiated unstructured supplementary service
   5.1 Handling of network initiated USSD
   5.2 Functions and information flows
        5.2.1 Invoking unstructured SS operation from
               the HLR
        5.2.2 Invoking unstructured SS operation from
               the VLR
        5.2.3 Invoking unstructured SS operation from
               the MSC
        5.2.4 Forwarding USSD operations
        5.2.5 Handling of unstructured SS operation at
               the MS
   5.3 Information stored in the HLR
   5.4 Information stored in the VLR
   5.5 Handover
   5.6 Cross-phase compatibility
6 Mobile initiated unstructured supplementary service
   data
   6.1 Handling of USSD request at MS
   6.2 Functions and information flows
        6.2.1 Handling of USSD request at MS
        6.2.2 Handling of USSD request at MSC
        6.2.3 Handling of USSD request at VLR
        6.2.4 Handling of USSD request at HLR
        6.2.5 Processing the USSD request
   6.3 Information stored in the HLR
   6.4 Information stored in the VLR
   6.5 Handover
   6.6 Cross-phase compatibility
History

Abstract

Gives the stage 2 description of Unstructured Supplementary Service Data (USSD).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	SMG 3
Supersedes	PRETS 300 549 : JAN 96