`
`$<%>
`
`GSM 02.30
`GSM
`July 1996
`TECHNICAL
`Verslon 5.3.0
`S PECIFICATION
`
`
`Source: ETSI TC-SMG
`
`Reference: TS/SMG-01023OQR2
`
`ICS: 33.060.50
`
`Key words: Digital cellular telecommunications system. Global System for Mobile communications (GSM)
`
`GSEITI'
`
`GLOBAL SYSTEM FOR
`MOBILE COMMUNICATIONS
`
`Digital cellular telecommunications system (Phase 2+);
`
`Man-Machine Interface (MMI) of the Mobile Station (MS)
`
`(GSM 02.30)
`
`ETSI
`
`European Telecommunications Standards Institute
`ETSI Secretariat
`
`Postal address: F-06921 Sophia Antipolis CEDEX - FRANCE
`Office address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
`X.400: c=fr, a=atlas, p=etsi. s=secretariat - lntemet: secretariat@etsi.fr
`Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
`
`Copyright Notification: No part may be reproduced except as authorized by written permission. 111s copyright and the
`foregoing restriction extend to reproduction in all media.
`
`© European Telecommunications Standards Institute 1996. All rights reserved.
`
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`SAMSUNG EXHIBIT 1024
`
`

`

`Page 2
`GSM 02.30 Version 5.3.0: July 1996
`
`Whilst every care has been taken in the preparation and publication of this document, errors in content,
`typographical or othenNise, 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.
`
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`Page 3
`GSM 02.30 Version 5.3.0: July 1996
`
`Contents
`
`Foreword ....................................................................................................................................................... 5
`
`Scope .................................................................................................................................................. 7
`Normative references ............................................
`0.1
`
`Abbreviations ....................................................................................................................... 8
`0.2
`
`General ................................................................................................................................................ 8
`1.1
`Basic philosophy .................................................................................................................. 8
`1.2
`Structure of the specification ............................................................................................... 9
`
`Physical user input features ................................................................................................................ 9
`2.1
`General ................................................................................................................................ 9
`2.2
`MMI related to MS access ................................................................................................... 9
`2.3
`MMI related to MS features ............
`2.4
`MMI related to user information .....
`2.5
`Other input features .......................
`
`
`
`Indications and output features ......................................................................................................... 10
`General .......................................
`3.1
`
`MMI related to MS access
`3.2
`
`MMI related to MS features ............
`3.3
`
`3.4
`MMI related to user information .....
`
`Other output features ......................................................................................................... 11
`3.5
`
`0
`
`1
`
`2
`
`3
`
`4
`
`30f30
`
`Procedures ........................................................................................................................................ 11
`4.1
`General ................................. 1 1
`
`MS access ......................................................................................................................... 11
`4.2
`4.3
`Definition of functions ........................................................................................................ 12
`4.4
`Call Control ............................................................................................. 12
`
`General .............................................. 12
`4.4.1
`
`Voice calls ..................................................................................................... 12
`4.4.2
`4.4.2.1
`Mobile originated calls ......................................................... 12
`Emergency calls ....................................... 12
`4.4.2.2
`
`Mobile terminated calls .................................................... 13
`4.4.2.3
`
`Supplementary Services Control ....................................................................................... 13
`General .......................................................................................................... 13
`4.5.1
`
`Structure of the MMI ......................................................................... 13
`4.5.2
`4.5.3
`Handling of supplementary services ............................................................. 15
`4.5.3.1
`Handling of defined GSM supplementary services .............. 15
`4.5.3.2
`Handling of not-implemented supplementary services ........ 15
`Registration of new password ....................................................................... 18
`Handling of supplementary services within a call .......................................... 18
`4.5.5.1
`Call Deflection, Call Waiting, call hold, multiparty services
`and call transfer general principles ...................................... 18
`Call Waiting (CW) ................................................................ 19
`4.5.5.2
`Call hold ................................
`4.5.5.3
`
`MultiParty .............................
`4.5.5.4
`
`Explicit Call Transfer............................................................ 20
`4.5.5.5
`Special case .................................................................... 20
`4.5.5.6
`
`Call Deflection ...................................................................... 20
`4.5.5.7
`Completion of calls to busy subscribers .............................. 20
`4.5.5.8
`SIM interfaces .................................................................................................................... 20
`Entry of PIN and PIN2 ........................................................ 20
`4.6.1
`
`Change of PIN or PIN2 ....................................................... 21
`4.6.2
`Unblocking of PIN or PIN2 ............................................................................ 21
`4.6.3
`
`Reading the abbreviated dialling code ...................................................... 21
`4.6.4
`Status information - return codes .................................................................. 21
`4.6.5
`
`4.5
`
`4.6
`
`4.5.4.
`4.5.5.
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`4.7.
`
`Presentation of IMEI .......................................................................................................... 21
`
`5
`
`The basic public MMI ........................................................................................................................ 22
`General .................................................................. 22
`5.1
`
`Basic public MMI specific features .................................................................................... 22
`5.2
`5.2.1
`Keyboard layout ............................................................................................ 22
`Number entry .................................... 22
`5.2.2
`
`Call control .................................................. 22
`5.2.3
`
`Call acceptance ............................................................................................ 23
`5.2.4
`5.2.5
`Call initiation .................................................................................................. 23
`5.2.5.1
`"Off Hook" call initiation ....................................................... 23
`5.2.5.2
`"On Hook" call initiation ................................................... 23
`
`Call termination ............................................................................................. 23
`
`5.2.6
`
`5.2.7
`5.2.8
`5.2.9
`
`Supplementary services control .................................................................... 23
`
`Payment .................................................................................................... 23
`Country/PLMN selection (For definition, see GSM 02.07) ............................ 23
`
`Annex A (normative):
`
`MS access mealy graph ..................................................................................... 24
`
`Annex B (normative):
`
`Codes for defined Supplementary Services ...................................................... 26
`
`Annex C (normative):
`
`Codes for Tele- and bearer services ................................................................. 28
`
`History ......................................................................................................................................................... 30
`
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`
`Foreword
`
`This Global System for Mobile communications Technical Specification (GTS) has been produced by the
`Special Mobile Group (SMG) Technical Committee (TC) of the European Telecommunications Standards
`Institute (ETSI).
`
`This GTS specifies the requirements for and gives guidelines on the MMI for calls on the GSM mobile
`station within the digital cellular telecommunications system (Phase 2/Phase 2+).
`
`This GTS is a TC-SMG approved GSM technical specification version 5, which contains GSM Phase 2+
`enhancements/features to the version 4 GSM technical specification. The ETS from which this Phase 2+
`GTS has evolved is Phase 2 GSM ETS 300 511 Edition 2 (GSM 02.30 version 4.13.0).
`
`GTS are produced by TC-SMG to enable the GSM Phase 2+ specifications to become publicly available,
`prior
`to submission for
`the formal ETSI
`standards approval procedure to become European
`Telecommunications Standards (ETS). This ensures the earliest possible access to GSM Phase 2+
`specifications for all Manufacturers, Network operators and implementors of the Global System for Mobile
`communications.
`
`The contents of this GTS are subject to continuing work within TC-SMG and may change following formal
`TC-SMG approval. Should TC-SMG modify the contents of this GTS it will then be republished by ETSI
`with an identifying change of release date and an increase in version number as follows:
`
`Version 5.x.y
`
`where:
`
`y
`
`x
`
`the third digit is incremented when editorial only changes have been incorporated in the
`specification;
`
`the second digit is incremented for all other types of changes, i.e. technical enhancements,
`corrections, updates, etc.
`
`The specification from which this GTS has been derived was originally based on CEPT documentation,
`hence the presentation of this GTS may not be entirely in accordance with the ETSI rules.
`
`Reference is made within this GTS to GSM-TSs (note).
`
`NOTE:
`
`TC-SMG has produced documents which give the technical specifications for the
`implementation of the digital cellular telecommunications system. Historically, these
`documents have been identified as GSM Technical Specifications (GSM-TSs). These
`TSs may have subsequently become l-ETSs (Phase 1), or ETSs/ETSI Technical
`Reports (ETRs) (Phase 2). TC-SMG has also produced ETSI GSM TSs which give the
`technical specifications for the implementation of Phase 2+ enhancements of the
`digital cellular telecommunications system. These version 5.x.x GSM Technical
`Specifications may be referred to as GTSs.
`
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`GSM 02.30 Version 5.3.0: July 1996
`
`0
`
`Scope
`
`The purpose of this specification is to define the requirements for and give guidelines on the MMI for calls
`on the GSM mobile station. This includes the requirements of the user procedures for call control and
`supplementary service control, the requirements on the physical input media and the output, such as
`indications and displayed information.
`
`This specification complements specifications GSM 02.07, 02.11, 02.17, 02.40, 03.01, 03.09, 03.12,
`03.14, 04.08, 05.08 11.01 and 11.10 and deals with MMI items not covered by these specifications.
`
`0.1
`
`Normative references
`
`This ETS incorporates by dated and undated reference, provisions from other publications. These
`normative references are cited at the appropriate places in the text and the publications are listed
`hereafter. For dated references, subsequent amendments to or revisions of any of these publications
`apply to this ETS only when incorporated in it by amendment or revision. For undated references, the
`latest edition of the publication referred to applies.
`
`[1]
`
`[2]
`
`[3]
`
`[4]
`
`[5]
`
`[6]
`
`[7]
`
`[8]
`
`[9]
`
`[10]
`
`[11]
`
`[12]
`
`[13]
`
`[14]
`
`GSM 01.04 (ETR 100): "Digital cellular telecommunication system (Phase 2);
`Abbreviations and acronyms".
`
`cellular
`"Digital
`(ETS 300 503):
`GSM 02.04
`(Phase 2); General on supplementary services".
`
`telecommunication
`
`system
`
`"Digital
`(ETS 300 505):
`GSM 02.07
`(Phase 2); Mobile Station (MS) features“.
`
`cellular
`
`telecommunication
`
`system
`
`"Digital
`(ETS 300 507):
`GSM 02.11
`(Phase 2); Service accessibility".
`
`cellular
`
`telecommunication
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 509):
`GSM 02.17
`(Phase 2); Subscriber identity modules Functional characteristics".
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 511):
`GSM 02.30
`(Phase 2); Man-Machine Interface (MMI) of the Mobile Station (M8)".
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 512):
`GSM 02.40
`(Phase 2); Procedures for call progress indications".
`
`system
`
`system
`telecommunication
`cellular
`"Digital
`(ETS 300 516):
`GSM 02.83
`(Phase 2); Call Waiting (CW) and Call Hold (HOLD) supplementary services -
`Stage 1".
`
`telecommunication
`cellular
`"Digital
`(ETS 300 517):
`GSM 02.84
`(Phase 2); MultiParty (MPTY) supplementary services - Stage 1".
`
`system
`
`system
`telecommunication
`cellular
`“Digital
`(ETS 300 625):
`GSM 02.90
`(Phase 2); Stage 1 description of Unstructured Supplementary Service Data
`(UUSD)".
`
`(ETS 300 521):
`GSM 03.01
`(Phase 2); Network functions".
`
`"Digital
`
`cellular
`
`telecommunication
`
`system
`
`"Digital
`(ETS 300 527):
`GSM 03.09
`(Phase 2); Handover procedures".
`
`cellular
`
`telecommunication
`
`system
`
`cellular
`“Digital
`(ETS 300 530):
`GSM 03.12
`(Phase 2); Location registration procedures".
`
`telecommunication
`
`system
`
`system
`telecommunication
`cellular
`"Digital
`(ETS 300 532):
`GSM 03.14
`(Phase 2); Support of Dual Tone Multi-Frequency signalling (DTMF) via the
`GSM system".
`
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`GSM 02.30 Version 5.3.0: July 1996
`
`[15]
`
`[16]
`
`[17]
`
`[18]
`
`[19]
`
`[20]
`
`[21]
`
`[22]
`
`[23]
`
`[24]
`
`telecommunication
`cellular
`"Digital
`(ETS 300 628):
`GSM 03.38
`(Phase 2); Alphabets and language-specific information".
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 557):
`GSM 04.08
`(Phase 2); Mobile radio interface layer 3 specification".
`
`system
`
`system
`telecommunication
`cellular
`"Digital
`(ETS 300 564):
`GSM 04.80
`(Phase 2); Mobile radio interface layer 3 supplementary services specification
`Formats and coding".
`
`"Digital
`(ETS 300 578):
`GSM 05.08
`(Phase 2); Radio subsystem link control".
`
`cellular
`
`telecommunication
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 599):
`GSM 09.02
`(Phase 2); Mobile Application Part (MAP) specification".
`
`system
`
`telecommunication
`cellular
`"Digital
`(ETS 300 607):
`GSM 11.10
`(Phase 2); Mobile Station (MS) conformity specification".
`
`system
`
`system
`telecommunication
`cellular
`"Digital
`(ETS 300 608):
`GSM11.11
`(Phase 2); Specification of the Subscriber Identity Module-Mobile Equipment
`(SIM-ME) interface".
`
`CCITT Recommendation E.164: "Numbering plan for the ISDN era".
`
`CCITT Recommendation E.131:
`supplementary telephone services".
`
`"Subscriber
`
`control
`
`procedures
`
`for
`
`CCITT Recommendation E.121: "Pictograms and symbols to assist users of the
`telephone service".
`
`0.2
`
`Abbreviations
`
`Abbreviations used in this specification are listed in GSM 01.04.
`
`1
`
`1.1
`
`General
`
`Basic philosophy
`
`The basic idea behind this specification is that it should give a minimum level of requirements, with
`emphasis on items which are seen as important from a pan-European usage point of view. This means,
`that the requirements are mainly dealing with standardized control procedures of access to services i.e.
`call establishment,
`invocation of supplementary services and so on. This also includes standardized
`network information to the users such as tones and announcements.
`
`The requirements on the physical layout of input and output features are kept to a minimum to allow for
`differentiated types of M85 and to ease the introduction of future developments in the area of MMI. The
`standardized control procedures describe the sequence of real actions to be taken by the users. However,
`since the requirements on the physical
`input features are minimal the control procedures may differ
`between MSs depending on the solution of the manufacturers. The “bridge" between these requirements
`is however that the same logical actions have to be taken by the user. That is, the user has to provide the
`same information for the call control and signalling no matter what the method is. This is also valid if an
`automatic device is used for carrying out the same actions. The logical procedures are therefore defined
`and standardized in this specification.
`
`The drawback of this approach is that the users of GSM mobile stations may face a lot of different types of
`physical MMI which they have to learn. However,
`to deal with this problem the specification gives a
`definition of a basic public MMI. The basic public MMI allows non-experienced, casual users to make and
`receive a telephony call. This definition is directed to manufacturers of public mobile telephones.
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`
`the user may set the ME to disable some or all of the MMI functions defined in this
`Optionally,
`specification. This setting shall only apply when the same SIM is in use (see GSM 02.17 for security
`policy), otherwise the ME shall enable the standard MMI.
`
`1.2
`
`Structure of the specification
`
`The specification is divided into sections describing respectively the control procedures, the input features
`and the output features. The final section defines the basic public MMI. For a lot of items for which no
`particular MMI specification is necessary there is a reference to the specifications where the basic
`requirements are to be found (i.e. MS features specified in GSM 02.07 and language of announcements
`specified in GSM 02.40).
`
`2
`
`2.1
`
`Physical user input features
`
`General
`
`This section gives the requirements or guidelines for the MMI of the input related MS features. Basic
`requirements on these features are given in GSM 02.07 and GSM 02.40.
`
`2.2
`
`MMI related to MS access
`
`No requirements additional to those in other GSM specifications (Ref. GSM 02.17, 11.10).
`
`2.3
`
`MMI related to MS features
`
`The three first issues are covered in GSM 02.07:
`
`* Country/ PLMN selection:
`The method is manufacturer optional.
`
`* International Access Function ("+" key):
`
`and
`
`* Keypad:
`
`The physical means of entering the characters 0-9, +, * and # (i.e. the SELECT function) may
`be keypad, voice input device, DTE or other, but there must be means to enter this
`information.
`
`The relationship on the keypad between the numbers and letters (where used) is important
`when mnemonic dialling may be used. The following relationship is therefore preferred
`though optional.
`
`1
`2
`3
`4
`5
`
`ABC
`DEF
`GHI
`JKL
`
`MNO
`PQRS
`TUV
`WXYZ
`
`6
`7
`8
`9
`0
`
`See also section 5.2.1.
`
`* ACCEPT, SEND and END functions:
`The physical means to perform these functions may be keypad, voice input device, DTE or
`other, but there must be means to perform these functions. ACCEPT and SEND may use the
`same means.
`
`* Setting of called Number Fields (Type of Number), use of the "+" key function:
`Users may enter a called number in two formats, called here International or Open. The Type
`of Number (TON) may be set to other values if required, but the procedure for this is not
`defined here.
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`"International format"
`This is entered by starting with a “+" followed by country code, even for national calls.
`This method is preferred for roaming and international calls, and highly desirable for
`storage of short codes or for call-forwarding.
`
`This sets the TON to “International" - see GSM 04.08 table 10.50.
`
`"Open format"
`This is when the "+“ is not entered, and the number is entered in the normal way for
`that network. The number may require a prefix or escape code as normal, for example
`for entering the international access code or national access code (often "0").
`
`This sets the TON to “Unknown" - see GSM 04.08 table 10.50.
`"National" case, which does not permit prefix or escape digits).
`
`(This is n_ot the
`
`Care should be taken with this format, since the dialled number will only be correct in a
`given network, and may be wrong when roaming. Caution must be applied when using
`stored numbers or call-forwarding.
`
`* Setting of Called Number Fields (Number Plan Indicator):
`The default Number Plan Identification (NPI) shall be CCITT E.164 if all the digits are in the range
`0-9 and the NPI shall be "unknown" if other number information is included. However,
`if the user
`selects (or has selected) a particular NPI (procedure not defined) then that NPI shall be used.
`
`* Entry of Bearer Capability Information Elements (BCIE):
`This is required in order to indicate information such as whether it is a voice or data call,
`facsimile, synchronous or asynchronous etc. The method for entering this information is of
`mobile manufacturer's option. For
`those mobile stations offering only telephony (and
`emergency calls), the default BCIE shall be for telephony (or emergency call). For mobile
`stations supporting non-voice services, there shall be means to set the BCIE required, by
`reading the appropriate field in the SIM and possibly otherwise. This field may be associated
`with or independent of the called number.
`
`2.4
`
`MMI related to user information
`
`These issues are covered in GSM 02.40:
`
`* Selection of language of announcements:
`No additional requirements are defined in this specification.
`
`2.5
`
`Other input features
`
`No requirements additional to those in other GSM specifications (Ref. GSM 03.14, 11.10).
`
`3
`
`3.1
`
`Indications and output features
`
`General
`
`This section gives the requirements and guidelines of the MMI aspects of the outputs such as displayed
`information, indications and tones. Basic requirements on these features are given in GSM 02.07 and
`GSM 02.40.
`
`3.2
`
`MMI related to MS access
`
`No requirements additional to those in other GSM specifications (ref. GSM 03.12, 04.08, 05.08).
`
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`
`3.3
`
`MMI related to MS features
`
`Country/PLMN Indication:
`
`*
`
`The country/PLMN Indication (see GSM 02.07 for definition) should be displayed as such that
`the user can uniquely identify the country and PLMN e.g. by alpha or numeric means or
`other.
`
`These issues are covered in GSM 02.07. No additional requirements are defined in this specification:
`
`*
`*
`*
`*
`
`Indication of Call Progress Signals
`Display of Called Number
`Short Message
`Call Charge Units Meter
`
`3.4
`
`MMI related to user information
`
`These issues are covered in GSM 02.40. No additional requirements are defined in this specification:
`
`* Selection of language of announcements
`* Supervisory tones.
`
`3.5
`
`Other output features
`
`No requirements additional to those in other GSM specifications (ref. GSM 03.01, 03.09, 03.12, 04.08 and
`05.08).
`
`4
`
`4.1
`
`Procedures
`
`General
`
`This section defines the MMI of the service access procedures, and supplementary service control
`procedures. These procedures are defined as logical procedures and in general no mandatory methods
`are specified. In order to make the descriptions continuous and clear requirements in GSM 02.07, 02.11,
`02.17 and 02.40 have been included or are referenced. The mapping between the MMI procedures and
`the call control entity is specified in GSM 04.08.
`
`4.2
`
`MS access
`
`The MS access procedure is comprised of the initial actions the user has to take before calls can be
`established or received. This procedure includes e.g.
`insertion of subscriber-card and entering the
`PIN-code.
`
`As there exist different types of MS and as requirements in other GSM specifications allow different
`options the MS access procedure may differ between mobile stations. The method for describing the MS
`access procedures is by using a MeaIy-graph, see Annex A.
`
`The graph shows the MS access for simple MS e.g. hand-held and they may be different for more
`complex stations. It should also be noted that the exact sequences of events are not described, these may
`be chosen by the manufacturers. Nevertheless, the related requirements in the other GSM specifications
`referenced in section 4.1 are applicable.
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`
`4.3
`
`Definition of functions
`
`The following functions are applicable and mandatory for the logical procedures for Mobile originated and
`terminated calls and for the control of Supplementary Services:
`
`ACCEPT:
`
`SELECT:
`
`SEND:
`
`Acceptance of a mobile terminated call.
`
`Entry of information.
`
`Transmission of the entered information to the network.
`
`INDICATION:
`
`Requirements in GSM 02.40 are applicable. Other indications may be given in
`addition throughout the procedure.
`
`END:
`
`Termination of or disconnection from the call. The execution of the END-function
`
`may be caused by either party involved in the call by e.g. termination, loss of
`coverage, invalidation of payment.
`
`4.4
`
`Call Control
`
`4.4.1
`
`General
`
`Voice calls to and from a Mobile station shall be controlled in accordance with the procedures described
`below. "Data calls" are expected to be controlled in a similar way but are not here specified.
`
`4.4.2
`
`Voice calls
`
`The voice call is either a normal telephony call or an emergency call.
`
`4.4.2.1
`
`Mobile originated calls
`
`The following sequence of functions shall be used:
`
`SELECT:
`
`SEND:
`
`Entry of called address information.
`
`Transmission of the called address.
`
`INDICATION:
`
`See section 4.3.
`
`END:
`
`Termination of the call.
`
`4.4.2.2
`
`Emergency calls
`
`With mobile stations supporting Telephony, it shall be possible to place an emergency call by entering 112
`followed by SEND in the manner specified in section 4.4.2.1. It may also be possible for a user to enter a
`preferred emergency MMI code of up to six digits (such as 999) followed by SEND to invoke an
`emergency call. In this latter case, the preferred code shall be stored in the SIM and the ME recognizes
`any dialled instance of this code to set up the emergency call. Additional means to place such a call are
`also allowed, e.g. provision of a dedicated button.
`
`The MS must support the initiation of an emergency call to “112" without a SIM present in the MS,
`regardless of the call being accepted or not by the network (national option to require IMSI).
`
`NOTE:
`
`In addition to the above procedure, calls to national emergency services may be made
`in the way standard for the country of the serving PLMN. However, with the exception
`of code "112", these are not treated within the PLMN as "Teleservice Emergency call"
`unless the ME recognizes the code as an emergency code as described above, and
`would require a valid IMSI.
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`4.4.2.3
`
`Mobile terminated calls
`
`The following sequence of functions shall be used:
`
`INDICATION:
`
`ACCEPT:
`
`INDICATION:
`
`END:
`
`Alert to the user that she is being called.
`
`Acceptance of the incoming call by the user.
`
`See section 4.3.
`
`Termination of the call.
`
`User Determined User Busy (UDUB):
`
`If, on being alerted by an incoming call, the called user
`enters "0 SEND", this shall set UDUB for that call, which
`shall either invoke call forwarding on busy, if active and
`operative, or else present BUSY to the calling party.
`
`4.5
`
`4.5.1
`
`Supplementary Services Control
`
`General
`
`The supplementary services shall be controlled in accordance with the procedures described below. All
`mobile stations with MMI shall be able to be controlled in this way, to minimize the confusion of users
`using different types of mobile station (quite likely, due to the use of the SIM IC card) and to permit the
`introduction by a PLMN operator of new supplementary services, not defined at the time of the design of a
`mobile station. These procedures are based on those recommended by CEPT/SF and CCITT
`Recommendation E131.
`
`The specified MMI shall be supported by the L3 signalling between the MS and the MSC, see GSM 04.80.
`
`In addition to these specified MMI procedures the MS may be equipped with additional enhanced MMI
`procedures (e.g. dedicated keys, menu procedures...), left to the discretion of the manufacturer. These
`procedures shall also be converted in accordance with GSM 04.80.
`
`4.5.2
`
`Structure of the MMI
`
`The following sequence of functions shall be used for the control of Supplementary Services:
`
`SELECT:
`
`SEND:
`
`Entry of the procedure information (may be a digit or a sequence of characters).
`
`Transmission of the information to the network.
`
`INDICATION:
`
`See section 4.3.
`
`The MS shall support the MMI procedure specified as:
`
`Activation
`Deactivation
`Interrogation
`Registration
`Erasure
`
`:
`:
`:
`:
`:
`
`*SC*SI#
`#SC*SI#
`*#SC*SI#
`*SC*SI# and **SC*SI#
`##SC*SI#
`
`This structure consists of the following parts:
`
`-
`-
`
`Service Code, SC( (2 or 3 digits)
`Supplementary Information, SI (variable length)
`
`The procedure always starts with *, #, **, ## or *# and is finished by #. Each part within the procedure is
`separated by *.
`
`The service code uniquely specifies the Supplementary Service, either as a defined GSM Supplementary
`Service or as a spare service code. All spare service codes shall be reserved for future use.
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`The MS shall determine from the context whether, an entry of a single *, activation or registration was
`intended.
`
`For example, a call forwarding request with a single * would be interpreted as registration if containing a
`forwarded-to number, or an activation if not.
`
`The supplementary information (SI) may comprise e.g. a PIN code or Directory Number. Where a
`particular service request does not
`require any SI,
`"*SI“
`is not entered, e.g. Activation becomes
`*SC#SEND. Where further supplementary information is required this is again entered as *Sl, e.g.
`*SC*S|A*SIB#SEND. SIB may be used to specify the tele or bearer service expressed as a Basic Service
`Group to which this supplementary service request applies, SIC may be used to specify the value of the
`"No Reply Condition Timer".
`
`Use of SIA, SIB, SIC for a particular procedure is optional. The procedure to be adopted where these are
`not all used is as follows:
`
`*Sl# shall be entered in any of the following formats:
`
`*S|A*S|B*SIC#
`*SIA*S|B#
`*S|A**S|C#
`*SIA#
`**S|b*S|C#
`**S|B#
`***S|C#
`#
`
`The denotation of the Supplementary Information and the order of entry are specified in Annex B.
`Supplementary Information Codes for the Teleservices and Bearer Services are given in Annex C.
`
`The following procedures shall be used for application of supplementary services to the call set-up
`procedure:
`
`*SCn*SI#DN SEND
`
`where SC is the service code defined in Annex B and *SI is an optional field which may be applicable to
`service SC. The “n" is a single digit used to indicate the numbering plan, profile, priority, etc. according to
`the service being applied. For simplicity of presentation, the leading * is shown on the assumption that the
`action is to activate (switch on) the required service. However, for a deactivation (or switch off), this would
`become:
`
`#SCn*SI#DN SEND
`
`It is assumed that the *# (interrogation) will not apply to call set-up.
`
`Where more than one supplementary service is applicable to the call set-up, these shall be concatenated
`with any applicable supplementary information immediately following the applicable service code.
`
`For example, if SCn and SI refer to one applicable supplementary service and son and si to another, then
`the generic procedure becomes:
`
`*SCn*Sl#scn*si#DN SEND
`
`NOTE:
`
`The order of entry of SC and sc is a user option, provided that any supplementary
`information follows immediately after the relevant SC.
`
`Where SI is not applicable according to the definition of the supplementary service, then *Sl is omitted.
`Where its use is optional, but not selected for a particular call set-up, it may be omitted or entered as an
`extra * if this is necessary to avoid ambiguity of interpretation.
`
`NOTE:
`
`By using the # as a separator, most cases are expected to be unambiguous.
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`4.5.3
`
`Handling of supplementary serv