SIST ETS 300 625 E2:2003

• Abstract:

  This European Telecommunication Standard (ETS) defines the stage 1 des cription of Unstructured Supplementary Service Data (USSD) for use in one or a number of GSM Public Land Mobile Networks (PLMNs).

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI ETS 300 625 ed.2 (1997-09) - Digital cellular telecommunications system (Phase 2) (GSM); Unstructured Supplementary Service Data (USSD); Stage 1 (GSM 02.90 version 4.1.1)

Overview

SIST ETS 300 625 E2:2003 is a European Telecommunication Standard that specifies the stage 1 description of Unstructured Supplementary Service Data (USSD) for use within GSM Phase 2 Public Land Mobile Networks (PLMNs). Developed by the Slovenski inštitut za standardizacijo (SIST) and based on ETSI work, this standard enables the integration and operation of USSD services across GSM networks in Europe. USSD is an integral mobile communications feature, allowing the exchange of real-time information between mobile stations (MS) and the network using unstructured data strings.

This document describes the requirements for mobile and network-initiated USSD operations, defining interactions, string formats, network behavior, and user communication mechanisms in GSM systems.

Key Topics

• GSM Phase 2 Supplementary Services: The standard centers on facilitating supplementary services within the GSM framework using USSD.
• USSD Operation Initiation:
  • Mobile-Initiated USSD: Users send USSD strings via the mobile station, which are interpreted by the network for further action.
  • Network-Initiated USSD: The network sends USSD strings to the user, which may request information or present updates.
• USSD String Formatting: Specification on string composition and allocated code ranges ensures correct routing and handling within networks.
• Compatibility: Guidelines for phase compatibility and procedures in cases of non-support or incompatibility.
• Service Code Allocation: Details concerning the reservation and use of supplementary service codes in compliance with international agreements.
• Language and Alphabet Indicators: Requirements for including indicators, supporting correct interpretation and display of transmitted information.
• Error Handling: Procedures for when USSD features are not supported by the mobile station or network, maintaining reliable user experience.

Applications

The practical applications of SIST ETS 300 625 E2:2003 span across telecommunications operations and mobile services:

• Mobile Customer Interaction: Users can access balance queries, account information, or initiate service requests using USSD codes.
• Interactive Services: Enables cost-effective, real-time services such as mobile banking, prepaid recharge, and surveys without the need for internet connectivity.
• Network Communication: Operators use USSD for efficient communication with subscribers, including promotional messages or critical notifications.
• Roaming and VPLMN/HPLMN Coordination: Standardized handling of USSD messages ensures seamless service experience for users moving across home and visited networks.
• Service Management: Mobile operators utilize USSD strings for the management and provisioning of supplementary services, leveraging the consistent code allocations and operation procedures defined by the standard.

Related Standards

To ensure comprehensive implementation, SIST ETS 300 625 E2:2003 references and aligns with several related GSM and telecommunication standards:

• GSM 01.04 (ETR 100): Provides abbreviations and acronyms relevant to GSM Phase 2.
• GSM 02.04 (ETS 300 503): General overview of supplementary services within GSM systems.
• GSM 02.30 (ETS 300 511): Details the man-machine interface of the mobile station.
• GSM 03.38 (ETS 300 537): Defines alphabets and language-specific information for GSM communication.
• GSM 04.80 (ETS 300 564): Supplementary services formats and coding for the mobile radio interface layer 3.

By adhering to SIST ETS 300 625 E2:2003, network operators and vendors can ensure robust, interoperable, and standardized USSD services in GSM networks, supporting a broad array of mobile-driven applications and efficient service management across Europe.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2) (GSM); Unstructured Supplementary Service Data (USSD); Stage 1 (GSM 02.90 version 4.1.1)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:ETS 300 625 Edition 2SIST ETS 300 625 E2:2003en01-december-2003SIST ETS 300 625 E2:2003SLOVENSKI
STANDARD
EUROPEANETS 300 625TELECOMMUNICATIONSeptember 1997STANDARDSecond EditionSource: ETSI SMGReference: RE/SMG-010290PRICS:33.020Key words:European digital cellular telecommunications system, Global System for Mobile communications(GSM)GLOBAL SYSTEM
FOR MOBILE COMMUNICATIONSRDigital cellular telecommunications system (Phase 2);Unstructured Supplementary Service Data (USSD) - Stage 1(GSM 02.90 version 4.1.1)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1997. All rights reserved.SIST ETS 300 625 E2:2003

Page 2ETS 300 625 (GSM 02.90 version 4.1.1): September 1997Whilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Committee Support Dept." at the address shown on the title page.SIST ETS 300 625 E2:2003

Page 3ETS 300 625 (GSM 02.90 version 4.1.1): September 1997ContentsForeword.51Scope.72Normative references.73Abbreviations.74Unstructured SS data operations.74.1Mobile initiated unstructured SS data operations.74.1.1Initiating action at the Mobile Station (MS).74.1.2Action at the network.74.1.3Mobile initiated USSD cross phase compatibility.84.1.4Allocation of service codes (to be noted by network operators).84.2Network initiated unstructured SS data operation.94.2.1Initiating actions in the network.94.2.2Actions at the MS.94.3Network aspects of unstructured SS data operation.9Annex A (informative):Change history.10History.11SIST ETS 300 625 E2:2003

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Page 5ETS 300 625 (GSM 02.90 version 4.1.1): September 1997ForewordThis European Telecommunication Standard (ETS) has been produced by the Special Mobile Group(SMG) of the European Telecommunications Standards Institute (ETSI).This ETS defines the stage 1 description of Unstructured Supplementary Service Data (USSD) for usewithin the European digital cellular telecommunications system (Phase 2).Transposition datesDate of adoption:22 August 1997Date of latest announcement of this ETS (doa):31 December 1997Date of latest publication of new National Standardor endorsement of this ETS (dop/e):30 June 1998Date of withdrawal of any conflicting National Standard (dow):30 June 1998SIST ETS 300 625 E2:2003

Page 6ETS 300 625 (GSM 02.90 version 4.1.1): September 1997Blank pageSIST ETS 300 625 E2:2003

Page 7ETS 300 625 (GSM 02.90 version 4.1.1): September 19971ScopeThis European Telecommunication Standard (ETS) defines the stage 1 description of UnstructuredSupplementary Service Data (USSD) for use in one or a number of GSM Public Land Mobile Networks(PLMNs).2Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references, thelatest edition of the publication referred to applies.[1]GSM 01.04 (ETR 100): "Digital cellular telecommunications system (Phase 2);Abbreviations and acronyms".[2]GSM 02.04 (ETS 300 503): "Digital cellular telecommunications system(Phase 2); General on supplementary services".[3]GSM 02.30 (ETS 300 511): "Digital cellular telecommunications system(Phase 2); Man-Machine Interface (MMI) of the Mobile Station (MS)".[4]GSM 03.38 (ETS 300 537): "Digital cellular telecommunications system(Phase 2); Alphabets and language-specific information".[5]GSM 04.80 (ETS 300 564): "Digital cellular telecommunications system(Phase 2); Mobile radio interface layer 3 supplementary services specificationFormats and coding".3AbbreviationsAbbreviations used in this ETS are listed in GSM 01.04 [1].4Unstructured SS data operations4.1Mobile initiated unstructured SS data operations4.1.1Initiating action at the Mobile Station (MS)If the user enters an MMI string that, according to GSM 02.30 [3], should be treated as USSD, the MSshall send this string to the network using the appropriate operation from GSM 04.80 [5].The mobile initiated operation shall contain an alphabet indicator and language indicator. The alphabetindicator shall indicate the alphabet used in the operation and shall be set to "SMS default alphabet". Thelanguage indicator shall indicate "language unspecified".The MS may initiate an USSD Operation either during a call or out of call.4.1.2Action at the networkA network supporting USSD shall examine the alphabet indicator. If the serving network does notrecognize the alphabet indicated
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