SIST ETS 300 606 E2:2003

Digital cellular telecommunications system (Phase 2) (GSM); Signalling interworking for supplementary services (GSM 09.11)

This European Telecommunication Standard (ETS) provides a detailed spe cification for interworking between the A-interface protocol and the M obile Application Part for handling of supplementary services. The MAP interfaces of interest are the B-, C-, D- and E-interfaces. The A-, C-, D- and E-interfaces are physical interfaces while the B-in terface is an internal interface defined for modelling purposes. Infor mation relating to the modelling interface is not normative in this ET S. Supplementary service signalling may be passed by the MSC/VLR between the A- and E-interfaces after inter-MSC handover. This procedure is tr ansparent as far as supplementary services are concerned therefore int erworking concerning this process is not described in this ETS. Clause 2 describes general procedures for interworking between the A- and D- physical interfaces. Clause 3 describes the general procedures for the SS version negotiati on. Clause 4 describes the mapping of layer 3 radio path messages with Tra nsaction Capabilities (TC) transaction sublayer messages for interwork ing between the A- and D- physical interfaces. Clause 5 describes specific interworking procedures for all interfaces relating to call related SS activity. Clause 6 describes specific interworking procedures for all interfaces relating to call independent SS activity. Clause 6 also covers the in terworking between the MAP User (see GSM 09.02) and the SS handling fu nctions of the network entities (see GSM 04.10 and 04.80). Reference is made to the following Technical Specifications: -   GSM 02.04 and GSM 02.8x and GSM 02.9x-series,    for definition of supplementary services; -   GSM 03.11, GSM 03.8x and GSM 03.9x-series,    for technical realization of supplementary services; -   GSM 04.10p GSM 04.80, GSM 04.8x and GSM 04.9x-series,    for radio path signalling procedures for supplementary services; -   GSM 09.02 (MAP).

Digitalni celični telekomunikacijski sistem (faza 2) - Signalizacijsko medsebojno delovanje za dopolnilne storitve (GSM 09.11)

General Information

• 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 300 606 ed.2 (1996-12) - Digital cellular telecommunications system (Phase 2) (GSM); Signalling interworking for supplementary services (GSM 09.11)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 606 E2:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D6LJQDOL]DFLMVNRPHGVHERMQR
GHORYDQMH]DGRSROQLOQHVWRULWYH*60
Digital cellular telecommunications system (Phase 2) (GSM); Signalling interworking for
supplementary services (GSM 09.11)
Ta slovenski standard je istoveten z: ETS 300 606 Edition 2
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 606 E2:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 606 E2:2003

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SIST ETS 300 606 E2:2003
EUROPEAN ETS 300 606
TELECOMMUNICATION December 1996
STANDARD Second Edition
Source: ETSI TC-SMG Reference: RE/SMG-030911PR2
ICS: 33.020
Key words: Digital cellular telecommunications system, Global System for Mobile communications (GSM)
R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS
Digital cellular telecommunications system (Phase 2);
Signalling interworking for supplementary services
(GSM 09.11)
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 - Internet: [e-mail]
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1996. All rights reserved.

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
Whilst 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.

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
Contents
Foreword .5
1 Scope .7
1.1 Normative references .8
1.2 Definitions and abbreviations.10
2 Introduction.11
2.1 MSC/VLR procedures for handling supplementary service signalling received over the
A-interface.11
2.2 MSC/VLR procedures for handling supplementary service signalling received over the
D-interface .11
3 SS version negotiation .12
3.1 Call related supplementary services interworking.12
3.2 Call independent supplementary services interworking.12
4 Mapping between TC transaction sublayer messages and layer 3 radio path messages .13
4.1 D-interface to A-interface mapping.13
4.2 A-interface to D-interface mapping.13
4.3 Procedures.14
5 Call related supplementary services management .15
5.1 SS management in connection establishment phase.15
5.1.1 Line Identification services .15
5.1.1.1 Calling Line Identification Presentation (CLIP) .15
5.1.1.2 Calling Line Identification Restriction (CLIR) .16
5.1.1.3 Connected Line Identification Presentation (COLP).16
5.1.1.4 Connected Line Identification Restriction (COLR).17
5.1.2 Call Forwarding services .17
5.1.2.1 Notification to served mobile subscriber.17
5.1.3 Call Waiting service (CW) .18
5.1.3.1 Offering a waiting call .18
5.1.3.2 Notification of waiting call to calling subscriber.18
5.1.4 Closed User Group service (CUG).19
5.1.4.1 Explicit invocation of a CUG call.19
5.1.4.2 Notification of CUG invocation to served MS .19
5.1.4.3 Notification of rejection of CUG invocation to served MS.20
5.1.4.4 Notification of CUG invocation to terminating MS .21
5.1.5 Advice of Charge services.22
5.1.5.1 Notification of Charging information to served MS, mobile
originated call.22
5.1.5.2 Notification of Charging information to served MS, mobile
terminated call .22
5.1.6 Call Barring services .23
5.1.6.1 Barring of outgoing calls .23
5.1.6.2 Barring of incoming calls .23
5.2 SS Management in stable connection state .24
5.2.1 Call Forwarding services .24
5.2.1.1 Notification of invocation of CFB to served mobile
subscriber .24
5.2.2 Call Hold service (HOLD).25
5.2.3 Multi Party service (MPTY).26
5.2.4 Advice of Charge services.27
5.3 SS Management in disconnecting phase .27
5.3.1 Call Forwarding services .27

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
6 Call independent supplementary services management. 28
6.1 MS initiated SS Management. 28
6.1.1 Connection establishment phase. 28
6.1.2 Connection established . 28
6.1.3 Connection release. 30
6.2 NW initiated SS Management. 30
6.2.1 Connection establishment phase. 30
6.2.2 Connection established . 30
6.2.3 Connection release. 31
6.2.4 ForwardCheckSSIndication . 31
6.3 Mapping of Operation Codes, Error Codes, Parameter Tags and Parameter Contents . 32
6.3.1 Operation codes . 32
6.3.2 Error codes . 32
6.3.3 Parameter tags and parameter values . 32
History. 33

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
Foreword
This European Telecommunication Standard (ETS) has been produced by the Special Mobile Group
(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).
This ETS provides a detailed specification for interworking between the A-interface protocol and the
Mobile Application Part (MAP) for handling of supplementary services within the Digital cellular
telecommunications system (Phase 2).
This ETS corresponds to GSM technical specification GSM 09.11 version 4.6.1.
The specification from which this ETS has been derived was originally based on CEPT documentation,
hence the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules.
Reference is made within this ETS to GSM-TSs (note).
Reference is also made within this ETS to GSM xx.xx series. The specifications in the series can be
identified, with their full title, within the normative reference clause of this ETS by the first two digits of their
GSM reference number e.g. GSM 09.xx series, refers to GSM 09.01, GSM 09.02, etc.
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 I-ETSs (Phase 1), or ETSs (Phase 2), whilst
others may become ETSI Technical Reports (ETRs). GSM-TSs are, for editorial
reasons, still referred to in current GSM ETSs.
Transposition dates
Date of adoption 6 December 1996
Date of latest announcement of this ETS (doa): 31 March 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 30 September 1997
Date of withdrawal of any conflicting National Standard (dow): 30 September 1997

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
1 Scope
This European Telecommunication Standard (ETS) provides a detailed specification for interworking
between the A-interface protocol and the Mobile Application Part for handling of supplementary services.
The MAP interfaces of interest are the B-, C-, D- and E-interfaces.
The A-, C-, D- and E-interfaces are physical interfaces while the B-interface is an internal interface defined
for modelling purposes. Information relating to the modelling interface is not normative in this ETS.
Supplementary service signalling may be passed by the MSC/VLR between the A- and E-interfaces after
inter-MSC handover. This procedure is transparent as far as supplementary services are concerned
therefore interworking concerning this process is not described in this ETS.
Clause 2 describes general procedures for interworking between the A- and D- physical interfaces.
Clause 3 describes the general procedures for the SS version negotiation.
Clause 4 describes the mapping of layer 3 radio path messages with Transaction Capabilities (TC)
transaction sublayer messages for interworking between the A- and D- physical interfaces.
Clause 5 describes specific interworking procedures for all interfaces relating to call related SS activity.
Clause 6 describes specific interworking procedures for all interfaces relating to call independent SS
activity. Clause 6 also covers the interworking between the MAP User (see GSM 09.02) and the SS
handling functions of the network entities (see GSM 04.10 and 04.80).
Reference is made to the following Technical Specifications:
- GSM 02.04 and GSM 02.8x and GSM 02.9x-series,
for definition of supplementary services;
- GSM 03.11, GSM 03.8x and GSM 03.9x-series,
for technical realization of supplementary services;
- GSM 04.10, GSM 04.80, GSM 04.8x and GSM 04.9x-series,
for radio path signalling procedures for supplementary services;
- GSM 09.02 (MAP).

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1.1 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] 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 02.24 (ETS 300 510): "Digital cellular telecommunications system
(Phase 2); Description of Charge Advice Information (CAI)".
[4] GSM 02.81 (ETS 300 514): "Digital cellular telecommunications system
(Phase 2); Line identification supplementary services - Stage 1".
[5] GSM 02.82 (ETS 300 515): "Digital cellular telecommunications system
(Phase 2); Call Forwarding (CF) supplementary services - Stage 1".
[6] GSM 02.83 (ETS 300 516): "Digital cellular telecommunications system
(Phase 2); Call Waiting (CW) and Call Hold (HOLD) supplementary services -
Stage 1".
[7] GSM 02.84 (ETS 300 517): "Digital cellular telecommunications system
(Phase 2); Multi Party (MPTY) supplementary services - Stage 1".
[8] GSM 02.85 (ETS 300 518): "Digital cellular telecommunications system
(Phase 2); Closed User Group (CUG) supplementary services - Stage 1".
[9] GSM 02.86 (ETS 300 519): "Digital cellular telecommunications system
(Phase 2); Advice of Charge (AoC) supplementary services - Stage 1".
[10] GSM 02.88 (ETS 300 520): "Digital cellular telecommunications system
(Phase 2); Call Barring (CB) supplementary services - Stage 1".
[11] GSM 02.90 (ETS 300 625): "Digital cellular telecommunications system
(Phase 2); Unstructured Supplementary Service Data (USSD) - Stage 1".
[12] GSM 03.11 (ETS 300 529): "Digital cellular telecommunications system
(Phase 2); Technical realization of supplementary services".
[13] GSM 03.81 (ETS 300 542): "Digital cellular telecommunications system
(Phase 2); Line identification supplementary services - Stage 2".
[14] GSM 03.82 (ETS 300 543): "Digital cellular telecommunications system
(Phase 2); Call Forwarding (CF) supplementary services - Stage 2".
[15] GSM 03.83 (ETS 300 544): "Digital cellular telecommunications system
(Phase 2); Call Waiting (CW) and Call Hold (HOLD) supplementary services -
Stage 2".

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
[16] GSM 03.84 (ETS 300 545): "Digital cellular telecommunications system
(Phase 2); Multi Party (MPTY) supplementary services - Stage 2".
[17] GSM 03.85 (ETS 300 546): "Digital cellular telecommunications system
(Phase 2); Closed User Group (CUG) supplementary services - Stage 2".
[18] GSM 03.86 (ETS 300 547): "Digital cellular telecommunications system
(Phase 2); Advice of Charge (AoC) supplementary services - Stage 2".
[19] GSM 03.88 (ETS 300 548): "Digital cellular telecommunications system
(Phase 2); Call Barring (CB) supplementary services - Stage 2".
[20] GSM 03.90 (ETS 300 549): "Digital cellular telecommunications system
(Phase 2); Unstructured Supplementary Service Data (USSD) - Stage 2".
[21] GSM 04.08 (ETS 300 557): "Digital cellular telecommunications system
(Phase 2); Mobile radio interface layer 3 specification".
[22] GSM 04.10 (ETS 300 558): "Digital cellular telecommunications system
(Phase 2); Mobile radio interface layer 3; Supplementary services specification;
General aspects".
[23] GSM 04.80 (ETS 300 564): "Digital cellular telecommunications system
(Phase 2); Mobile radio interface layer 3 supplementary services specification;
Formats and coding".
[24] GSM 04.81 (ETS 300 565): "Digital cellular telecommunications system
(Phase 2); Line identification supplementary services - Stage 3".
[25] GSM 04.82 (ETS 300 566): "Digital cellular telecommunications system
(Phase 2); Call Forwarding (CF) supplementary services - Stage 3".
[26] GSM 04.83 (ETS 300 567): "Digital cellular telecommunications system
(Phase 2); Call Waiting (CW) and Call Hold (HOLD) supplementary services -
Stage 3".
[27] GSM 04.84 (ETS 300 568): "Digital cellular telecommunications system
(Phase 2); Multi Party (MPTY) supplementary services - Stage 3".
[28] GSM 04.85 (ETS 300 569): "Digital cellular telecommunications system
(Phase 2); Closed User Group (CUG) supplementary services - Stage 3".
[29] GSM 04.86 (ETS 300 570): "Digital cellular telecommunications system
(Phase 2); Advice of Charge (AoC) supplementary services - Stage 3".
[30] GSM 04.88 (ETS 300 571): "Digital cellular telecommunications system
(Phase 2); Call Barring (CB) supplementary services - Stage 3".
[31] GSM 04.90 (ETS 300 572): "Digital cellular telecommunications system
(Phase 2); Unstructured supplementary services operation - Stage 3".

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[32] GSM 09.02 (ETS 300 599): "Digital cellular telecommunications system
(Phase 2); Mobile Application Part (MAP) specification".
[33] GSM 09.10 (ETS 300 605): "Digital cellular telecommunications system
(Phase 2); Information element mapping between Mobile Station - Base Station
System and BSS - Mobile-services Switching Centre (MS - BSS - MSC)
Signalling procedures and the Mobile Application Part (MAP)".
1.2 Abbreviations
Abbreviations used in this ETS are listed in GSM 01.04.

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
2 Introduction
This clause describes general procedure at the MSC/VLR for SS interworking between the A- and
D-interfaces.
2.1 MSC/VLR procedures for handling supplementary service signalling received over the
A-interface
Upon receipt of supplementary service signalling on the A-interface, the MSC/VLR shall:
- perform any internal SS checks or procedures appropriate to the signal (see clauses 4 and 5);
- if necessary request access to the HLR over the D-interface using the procedures defined in this
ETS and MAP, GSM 09.02;
- use the version indicator received from the MS to set up the right AC context name towards the
HLR (see clause 3). The version indicator is described in GSM 04.10 and 04.80. AC names are
defined in GSM 09.02;
- perform mapping between layer 3 messages on the radio path and TC transaction sublayer
messages as required (see clause 3).
2.2 MSC/VLR procedures for handling supplementary service signalling received over the
D-interface
Upon receipt of supplementary service signalling on the D-interface, the MSC/VLR shall:
- perform any internal SS checks or procedures appropriate to the signal (see clauses 4 and 5);
- handle any information elements according to the screening indicator procedure as described in
GSM 04.10;
- perform mapping between TC transaction sublayer messages and layer 3 messages on the radio
path as required (see clause 3).

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
3 SS version negotiation
This clause describes the general procedures for the call related and call independent supplementary
services version negotiation.
3.1 Call related supplementary services interworking
No interworking identified.
3.2 Call independent supplementary services interworking
On receipt of the REGISTER message from the MS, the MSC/VLR will include the appropriate AC name
in the dialogue control portion of the BEGIN message based on the following rules:
- if no version indicator is present, no AC name is included in the BEGIN message towards the HLR
(no AC name indicates "version1");
- if the version indicator is less or equal to the highest AC name the MSC/VLR and HLR both support,
the "dialogue" will be handled according to the AC name corresponding to the version indicator and
to the SS operation received;
- if the version indicator is greater than the highest commonly supported AC name within the network
(MSC/VLR, HLR), the "dialogue" will be handled according to this highest AC name if the request
from the MS can also be fulfilled with this version of the "dialogue".
The selection of the highest commonly supported AC name by the network is described in GSM 09.02.
It should be noted that unknown parameters of the extension field within the Facility Information Element
shall be forwarded to a phase 2 HLR according to the Extensibility rules as defined in GSM 09.02. They
may be discarded when sent to a phase 1 HLR.
According to this version of the standards, the highest AC name is "version2".
The description method employed in the clauses 4 to 6 is tabled showing the mapping of parameter
values. The exact values of the parameters and parameter tags can be found in the referenced
specifications.

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
4 Mapping between TC transaction sublayer messages and layer 3 radio path
messages
This clause describes the mapping of TC transaction sublayer messages to layer 3 radio path messages
over the external interfaces. The precise coding of these messages is given in other technical
specifications.
4.1 D-interface to A-interface mapping
Table 4.1 shows the mapping of TC transaction sublayer messages to layer 3 messages on the radio
path.
Table 4.1: Mapping of TC transaction sublayer messages to layer 3 radio path messages
TC transaction sublayer message Layer 3 radio path message
BEGIN REGISTER (note 1)
CONTINUE (note 2) FACILITY/REGISTER (note 3)
END (note 2) RELEASE COMPLETE/REGISTER (note 3)
ABORT (note 2) RELEASE COMPLETE
NOTE 1: AC name is not mapped to a version indicator.
NOTE 2: The user information field if present is discarded.
NOTE 3: A CONTINUE or END is mapped to REGISTER if a new transaction has to be established.
4.2 A-interface to D-interface mapping
Table 4.2 shows the mapping of layer 3 radio path messages to TC transaction sublayer messages.
Table 4.2: Mapping of layer 3 radio path messages to TC transaction sublayer messages
Layer 3 radio path message TC transaction sublayer message
REGISTER BEGIN (note)
FACILITY CONTINUE
RELEASE COMPLETE END
NOTE: The right AC name shall be included, see clause 3.

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4.3 Procedures
The mapping from TC Transaction Sublayer messages to Layer 3 radio path messages must include a
replacement of the tag and length of the Component Portion in the Transaction Sublayer message with
the Information element identifier and length of the Facility Information Element for the Layer 3 message.
Similarly for the reverse mapping. However, if a version indicator is received an AC name will be provided
in the BEGIN message, see clause 3.
All transaction sublayer messages, except the ABORT message, will normally contain one or more
components. If components are included, the conversion algorithm described below applies. If a message
does not contain a component, then the corresponding message is also sent without a component:
messages shall not be withheld by the interworking function.
For call independent SS operations each message shall only contain a single component. If a message
contains more than one component then a RELEASE COMPLETE message with the cause "Facility
rejected" (see GSM 04.08) and without any component shall be sent on the radio path (see GSM 04.10).
TC Transaction sublayer messages can also contain a dialogue portion. If a user-information is received
within this dialogue portion, it will not be conveyed in a Layer 3 radio path message.
If an ABORT message is received in TC, a RELEASE COMPLETE message is to be sent on the radio
path. The RELEASE COMPLETE message shall not contain any component. If a cause is to be provided
to the MS, one of the cause codes of GSM 04.08 shall be used.
If an ABORT message with a dialogue portion indicating "version fallback" (e.g. the cause
"AC-not-supported") is received in TC then, if the MSC does not re-attempt the "dialogue" (e.g. by using a
different AC name), it shall send a RELEASE COMPLETE to the MS with the cause "Facility rejected"
(see GSM 04.08) and without any component.
If an END message with a dialogue portion indicating "dialogue refused" is received in TC then the MSC
shall send a RELEASE COMPLETE to the MS with the cause "Facility rejected" (see GSM 04.08) and
without any component.
If a layer 3 radio path message or a component in the layer 3 radio path message is rejected by the MSC,
the MSC shall:
- return a RELEASE COMPLETE message to the MS. If the reject condition is not associated with a
component, one of the cause codes of GSM 04.08 shall be inserted, as described below. If it is a
component (except a REJECT component), a REJECT component with the appropriate problem
code shall be inserted in the RELEASE COMPLETE message, as described below. If the reject
condition concerns a REJECT component the RELEASE COMPLETE message may be empty;
- terminate the transaction with the VLR by use of an ABORT message.
If a dialogue cannot be established with the HLR because no common AC name is available then the
MSC shall send a RELEASE COMPLETE to the MS with the cause "Facility rejected".

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5 Call related supplementary services management
5.1 SS management in connection establishment phase
When a CM connection is being set up between an MS and an MSC, setting up of a connection between
the MSC and the VLR to request access proceeds as for normal call set-up (see GSM 09.02). Moreover,
the MSC will also assess the capabilities of the MS according to the screening indicator (see GSM 04.10
and 04.80). As the call set-up proceeds, the following supplementary services may apply:
5.1.1 Line Identification services
These supplementary services (described in GSM 04.81) require interworking in the MSC between both
GSM 04.08, MAP (GSM 09.02) and the fixed network protocol, see also GSM 09.10.
5.1.1.1 Calling Line Identification Presentation (CLIP)
The signalling at invocation of the CLIP supplementary service is shown in figure 5.1.
0606&9/5
‚¶„‚¶„‚¶„
•• •• ••
••••6(1’,1)250$7,21)25,1&20,1*&$//6(783••
••••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••
•• •• ••
••••&203/(7(&$//••
••6(783••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••
••¶¶¶¶¶¶¶¶¶¶••••
•• •• ••
Figure 5.1: Signalling for CLIP supplementary service
When a call terminates at a mobile subscriber, the MSC obtains information on what supplementary
services are active by analysing the SS-Data parameter in the MAP_COMPLETE_CALL service primitive
on the B-interface. If this parameter indicates that the CLIP service is provided (and CLIR is not indicated
in the incoming call set-up message from the PSTN), then the number of the calling subscriber (if
received in the incoming call set-up) shall be mapped onto the Calling Party BCD number parameter in the
SETUP message sent to the mobile. Exact values of the parameter and parameter tags are indicated in
GSM 04.80 and 04.81.

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ETS 300 606 (GSM 09.11 version 4.6.1): December 1996
5.1.1.2 Calling Line Identification Restriction (CLIR)
The signalling at invocation of the CLIR supplementary service is shown in figure 5.2.
0606&9/5
‚¶„‚¶„‚¶„
•• •• ••
••6(783••6(1’,1)250$7,21)25287*2,1*&$//6(783••
••¶¶¶¶¶¶¶¶¶¶!••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••
•• •• ••
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••••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••
•• •• ••
Figure 5.2: Signalling for CLIR supplementary service
When a call originates at a mobile subscriber, the MSC obtains information on what supplementary
services are
...