SIST ETS 300 543 E2:2003

Digital cellular telecommunications system (Phase 2) (GSM); Call Forwarding (CF) supplementary services; Stage 2 (GSM 03.82)

This European Telecommunication Standard (ETS) gives the stage 2 descr iption of the call forwarding supplementary services. The group of supplementary services call offering supplementary servic es is divided into 4 different supplementary services: -   Call forwarding unconditional   (CFU)   (clause 1);  -   Call forwarding on mobile subscriber busy   (CFB)   (clause 2);  -   Call forwarding on no reply   (CFNRy)   (clause 3); -   Call forwarding on mobile subscriber not reachable   (CFNRc)   (clause 4 ).

Digitalni celični telekomunikacijski sistem (faza 2) – Dopolnilna storitev: podaja klica (CF) – Stopnja 2 (GSM 03.82)

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 300 543 ed.2 (1997-01) - Digital cellular telecommunications system (Phase 2) (GSM); Call Forwarding (CF) supplementary services; Stage 2 (GSM 03.82)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 543 E2:2003
01-december-2003
'LJLWDOQLFHOLþQLWHOHNRPXQLNDFLMVNLVLVWHPID]D±'RSROQLOQDVWRULWHYSRGDMD
NOLFD&)±6WRSQMD*60
Digital cellular telecommunications system (Phase 2) (GSM); Call Forwarding (CF)
supplementary services; Stage 2 (GSM 03.82)
Ta slovenski standard je istoveten z: ETS 300 543 Edition 2
ICS:
33.070.50 Globalni sistem za mobilno Global System for Mobile
telekomunikacijo (GSM) Communication (GSM)
SIST ETS 300 543 E2:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 543 E2:2003

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SIST ETS 300 543 E2:2003
GSM ETS 300 543
TECHNICAL January 1997
SPECIFICATION Second Edition
Source: ETSI TC-SMG Reference: RE/SMG-030382P
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);
Call Forwarding (CF) supplementary services - Stage 2
(GSM 03.82)
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 1997. All rights reserved.

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SIST ETS 300 543 E2:2003
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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
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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SIST ETS 300 543 E2:2003
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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Contents
Foreword .5
0 Scope .7
0.1 Normative references .7
0.2 Abbreviations .7
0.3 The forwarded-to number .7
0.4 Cross phase compatibility.8
1 Call forwarding unconditional (CFU) .9
1.1 Handling of call forwarding unconditional .9
1.1.1 Registration .9
1.1.2 Erasure.12
1.1.3 Activation.14
1.1.4 Deactivation.16
1.1.5 Interrogation .18
1.2 Functions and information flows .18
1.3 Information stored in the HLR.21
1.4 State transition model .22
1.5 Transfer of information from HLR to VLR.22
1.6 Information stored in the VLR .23
1.7 Handover .23
1.8 Cross phase compatibility.23
1.8.1 MS, MSC, VLR or HLR only support phase 1 control of SS by the
subscriber.23
1.8.2 HLR only supports phase 1 updating of subscriber information.23
1.8.3 VLR only supports phase 1 updating of subscriber information.23
1.8.4 GMSC only supports phase 1 call handling.23
2 Call forwarding on mobile subscriber busy.24
2.1 Handling of call forwarding on mobile subscriber busy.24
2.1.1 Registration .24
2.1.2 Erasure.26
2.1.3 Activation.28
2.1.4 Deactivation.30
2.1.5 Interrogation .32
2.2 Functions and information flows .32
2.3 Information stored in the HLR.38
2.4 State transition model .39
2.5 Transfer of information from HLR to VLR.39
2.6 Information stored in the VLR .40
2.7 Handover .40
2.8 Cross phase compatibility.40
2.8.1 MS, MSC, VLR or HLR only support phase 1 control of SS by the
subscriber.40
2.8.2 HLR only supports phase 1 updating of subscriber information.40
2.8.3 VLR only supports phase 1 updating of subscriber information.40
2.8.4 VLR only supports phase 1 call handling .40
3 Call forwarding on no reply.41
3.1 Handling of call forwarding on no reply.41
3.1.1 Registration .41
3.1.2 Erasure.43
3.1.3 Activation.45
3.1.4 Deactivation.47
3.1.5 Interrogation .49
3.2 Functions and information flows .49
3.3 Information stored in the HLR.53

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
3.4 State transition model. 54
3.5 Transfer of information from HLR to VLR . 54
3.6 Information stored in the VLR . 55
3.7 Handover. 55
3.8 Cross phase compatibility . 55
3.8.1 MS, MSC, VLR or HLR only support phase 1 control of SS by the
subscriber . 55
3.8.2 HLR only supports phase 1 updating of subscriber information . 55
3.8.3 VLR only supports phase 1 updating of subscriber information . 55
3.8.4 VLR only supports phase 1 call handling. 55
4 Call forwarding on mobile subscriber not reachable. 56
4.1 Handling of call forwarding on mobile subscriber not reachable. 56
4.1.1 Registration. 56
4.1.2 Erasure . 58
4.1.3 Activation . 60
4.1.4 Deactivation . 62
4.1.5 Interrogation. 64
4.2 Functions and information flows. 65
4.2.1 Call re-routed from VLR. 65
4.2.2 Call re-routed from HLR . 65
4.3 Information stored in the HLR . 77
4.4 State transition model. 78
4.5 Transfer of information from HLR to VLR . 78
4.6 Information stored in the VLR . 79
4.7 Handover. 79
4.8 Cross phase compatibility . 79
4.8.1 MS, MSC, VLR or HLR only support phase 1 control of SS by the
subscriber . 79
4.8.2 HLR only supports phase 1 updating of subscriber information . 79
4.8.3 VLR only supports phase 1 updating of subscriber information . 79
4.8.4 GMSC only supports phase 1 call handling. 79
4.8.5 VLR only supports phase 1 call handling. 79
History. 80

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
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 defines the stage 2 of the Call Forwarding (CF) supplementary services for the digital cellular
telecommunications system (Phase 2).
This ETS corresponds to GSM Technical Specification (GSM-TS) GSM 03.82 version 4.8.1.
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 (see 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 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 20 December 1996
Date of latest announcement of this ETS (doa): 30 April 1997
Date of latest publication of new National Standard
or endorsement of this ETS (dop/e): 31 October 1997
Date of withdrawal of any conflicting National Standard (dow): 31 October 1997

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Blank page

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
0 Scope
This European Telecommunication Standard (ETS) gives the stage 2 description of the call forwarding
supplementary services.
The group of supplementary services call offering supplementary services is divided into 4 different
supplementary services:
- Call forwarding unconditional (CFU) (clause 1);
- Call forwarding on mobile subscriber busy (CFB) (clause 2);
- Call forwarding on no reply (CFNRy) (clause 3);
- Call forwarding on mobile subscriber not reachable (CFNRc) (clause 4).
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] 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 02.82 (ETS 300 515): "Digital cellular telecommunications system
(Phase 2); Call Forwarding (CF) supplementary services - Stage 1".
[3] GSM 03.11 (ETS 300 529): "Digital cellular telecommunications system
(Phase 2); Technical realization of supplementary services".
[4] GSM 03.15 (ETS 300 533): "Digital cellular telecommunications system
(Phase 2); Technical realization of operator determined barring".
0.2 Abbreviations
Abbreviations used in this ETS are listed in GSM 01.04.
0.3 The forwarded-to number
As indicated in GSM 02.82 the forwarded-to numbers are stored in the international format. The transfer
from the HLR to other network entities and storage in the VLR shall also be in the international format.

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
0.4 Cross phase compatibility
For the following supplementary services, a number of changes exist between this ETS and the phase 1
specification:
- Call forwarding unconditional;
- Call forwarding on mobile subscriber busy;
- Call forwarding on no reply;
- Call forwarding on mobile subscriber not reachable.
The main body of this ETS assumes that all network entities comply with this version of the service. In
each case an additional subclause (subclause x.6) defines the additional requirements for when one or
more network entities or the MS complies with the phase 1 specifications for the supplementary service
procedures.

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
1 Call forwarding unconditional (CFU)
1.1 Handling of call forwarding unconditional
1.1.1 Registration
At the beginning of registration subscription to the basic service, provision of the supplementary service
and sufficiency of registration information has to be checked (see figure 1.2).
The following information has to be registered in the network:
1) the forwarded-to number (possibly including a sub-address);
2) information as to whether all calls or all calls of a specific basic service group should be forwarded.
The basic service group code
If the registration request received by the HLR does not contain any basic service group code, the
registration shall be performed for all subscribed basic service groups for which CFU is provided, see
figure 1.2.
The forwarded-to number
If the forwarded-to number is a number in the HPLMN country, it may be entered by the served mobile
subscriber in three different formats, independent of his actual location, according to the schemes:
1) national (significant) number;
2) (trunk) prefix plus national (significant) number;
3) international prefix, country code, national (significant) number.
The received number may have to be converted to an international number before further processing (see
figure 1.2).
The network may also validate the forwarded-to number before accepting the call forwarding registration
request.
Supplementary Service interaction
Possible interaction situations between CFU and other call forwarding and barring supplementary services
must then be checked. This is described in figure 1.2. Also see technical specifications GSM 02.04 and
02.82. For interaction between CFU and other supplementary services (i.e. not call barring or call
forwarding services), the reader is referred to the respective technical specification for those
supplementary services.
Notifications to the subscriber
When the mobile subscriber registers CFU, the network shall attempt to register and activate the service.
The network will return notification of acceptance of the request. This notification will include the
forwarded-to number and possibly the basic service group code to which CFU is registered.

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SIST ETS 300 543 E2:2003
Page 10
ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
If the system cannot accept a registration request, the network sends a notification that CFU registration
was not successful to the served mobile subscriber.
The information flow for registration of CFU is shown in figure 1.1.
0606&9/5+/5
BBBBBBBBBBBBBBBBBBBB
•• •• •• ••
••5HJLVWHU&)8••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••••••
••••5HJLVWHU&)8••••
••••¶¶¶¶¶¶¶¶¶¶¶!••••
••••••5HJLVWHU&)8••
••••••¶¶¶¶¶¶¶¶¶¶¶!••
•••••••&)8•
••••••$FNQRZOHGJH••
••••••¶¶¶¶¶¶¶¶¶¶¶••
••••$FNQRZOHGJH••••
••••¶¶¶¶¶¶¶¶¶¶¶••••
••5HOHDVHFRPSOHWH••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••••••
••?)DFLOLW\••••••
Figure 1.1: Registration of call forwarding unconditional

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SIST ETS 300 543 E2:2003
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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Process CFU1 382_12(1)
idle 2 1
register
yes
BOIC/
CFU
BOIC-exHC
active
no
BS ftn
no yes
set BS =
included in in HPLMN
all BS
request country
yes
no
make any
no
CFU operative BIC-Roam
provided and CCF services
quiescent
yes
subset of
no
required BS
provided
set set
yes
error result
Not, e.g.:
no
valid  -   special service number;
ftn  -   own number.
yes
national
number
acknowledge
type
convert to
international
international
(from HPLMN)
idle
yes
BAIC
active
no
 BS:        Basic Service group.
 ftn:         forwarded-to number.
 CCF:       "Conditional" Call Forwarding.
 BAOC:      Barring of All Outgoing Calls.
 BOIC:      Barring of Outgoing International Calls.
yes
BAOC
 BOIC-exHC: Barring of Outgoing International Calls
active
            - except those directed to HPLMN Country.
 BAIC:       Barring of All Incoming Calls.
 BIC-Roam:  Barring of Incoming Calls when Roaming
no
            outside the home PLMN country.

2 1
Figure 1.2: CFU1 Call forwarding unconditional registration process

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
1.1.2 Erasure
A previous registration can be erased in either of the following three ways:
- the subscriber can specifically erase a previous registration (to a basic service group) with an
appropriate control procedure;
- the subscriber can register information for CFU (to a basic service group), thus causing previous
registrations of CFU to be overridden (in the network this shall be handled as an erasure
immediately followed by a registration);
- all information is erased as a result of withdrawal of the supplementary service (administrative
handling).
The basic service group code
If the erasure request received by the HLR does not contain any basic service group code, the erasure
request applies for all basic service groups for which CFU is registered (see figure 1.4).
Supplementary Service interaction
Possible interaction situations between CFU and other supplementary services must then be checked.
This is shown in figure 1.4. Also see technical specifications GSM 02.04 and 02.82. For interaction
between CFU and other supplementary services (i.e. not call barring or call forwarding services), the
reader is referred to the respective technical specification for those supplementary services.
Notifications to the subscriber
When the mobile subscriber erases CFU, the network shall attempt to erase (and thus deactivate) the
service. The network shall send an indication of acceptance or rejection of the erasure request to the
served mobile station.
The information flow for erasure of CFU is shown in figure 1.3.
0606&9/5+/5
BBBBBBBBBBBBBBBBBBBB
••(UDVH&)8••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••(UDVH&)8••••
••••¶¶¶¶¶¶¶¶¶¶¶!••(UDVH&)8••
••••••¶¶¶¶¶¶¶¶¶¶¶!••
•••••••&)8•
••••••$FNQRZOHGJH••
••5HOHDVHFRPSOHWH••$FNQRZOHGJH••¶¶¶¶¶¶¶¶¶¶¶••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••¶¶¶¶¶¶¶¶¶¶¶••••
••?)DFLOLW\••••••
•• •• •• ••
Figure 1.3: Erasure of call forwarding unconditional

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SIST ETS 300 543 E2:2003
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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Process CFU2 382_14(1)
idle
erase
CFU
BS
no
included
in request
yes
set BS =
all BS
no
CFU
provided
yes
make any
quiescent BIC-Roam
and CCF services
operative
set set
error result
acknowledge
 BS:       Basic Service group.
 CCF:      "Conditional" Call Forwarding.
 BIC-Roam: Barring of Incoming Calls when Roaming
           outside the home PLMN country.
idle
Figure 1.4: CFU2 Call forwarding unconditional erasure process

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
1.1.3 Activation
The network initially checks subscription to the basic service and registration status of the supplementary
service (see figure 1.6).
Possible interaction situations between CFU and other supplementary services must then be checked.
The SDL diagrams in figure 1.6 shows the function to be performed in the HLR in order to deal with the
interactions between CFU and the call restriction and conditional call forwarding services. Also see
GSM 02.04 and 02.82. For interaction between CFU and other supplementary services (i.e. not call
barring or call forwarding services), the reader is referred to the respective technical specification for those
supplementary services.
The Basic Service Group Code
If the activation request received by the HLR does not contain any basic service group code, the activation
request shall apply to all subscribed basic service groups against which a CFU forwarded-to number is
registered. If a forwarded-to number is not registered against even a subset of the required basic service
group, the request will be rejected.
Note that according to GSM 02.04, a request for activation shall still be accepted although the CFU
supplementary service was already active for all basic service groups.
Notification to the subscriber
The network will return notification of acceptance, partial acceptance or rejection of the request to the
mobile station.
The information flow for activation of CFU is shown in figure 1.5.
0606&9/5+/5
BBBBBBBBBBBBBBBB
••$FWLYDWH&)8••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••$FWLYDWH&)8••••
••••¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••$FWLYDWH&)8••
••••••¶¶¶¶¶¶¶¶¶¶¶¶¶!••
•••••••&)8•
••••••$FNQRZOHGJH••
••••••¶¶¶¶¶¶¶¶¶¶¶¶¶••
••••$FNQRZOHGJH••••
••••¶¶¶¶¶¶¶¶¶¶¶¶¶¶••••
••5HOHDVHFRPSOHWH••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••••••
••?)DFLOLW\••••••
•••• ••••
Figure 1.5: Activation of call forwarding unconditional

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SIST ETS 300 543 E2:2003
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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Process CFU3 382_16(1)
idle
activate
CFU
CFU
no
registered
for required
BS
yes
yes
BAIC
active
no
yes
BAOC
active
no
BOIC/
yes
BOIC-exHC
active
no
ftn in
yes
HPLMN
country
make any
operative BIC-Roam
and CCF services
no
quiescent
set set set
result error error
 CCF:       "Conditional" Call Forwarding.
acknowledge
 BS:        Basic Service group.
 ftn:         forwarded-to number.
 BAIC:       Barring of All Incoming Calls.
 BAOC:      Barring of All Outgoing Calls.
 BOIC:      Barring of Outgoing International Calls.
 BOIC-exHC: Barring of Outgoing International Calls - except
idle
            those directed to HPLMN Country.
Figure 1.6: CFU3 Call forwarding unconditional activation process

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
1.1.4 Deactivation
The previous activation can be deactivated in either of the following three ways:
- the subscriber can specifically deactivate a previous activation (to a basic service group) with an
appropriate control procedure;
- the subscriber can register information for CFU (to a basic service group), thus causing previous
registrations and activations of CFU to be overridden (this shall be handled in the same way as an
erasure (implying deactivation) immediately followed by a registration (implying activation));
- the service is deactivated as a result of withdrawal of the supplementary service (administrative
handling).
Possible interaction situations between CFU and other supplementary services must be checked. The
SDL diagram in figure 1.8 shows the function to be performed in the HLR in order to deal with the possible
interactions between CFU and the conditional call forwarding services.
The Basic Service Group Code
The CFU deactivation request may specify a basic service group for which deactivation is required. If the
deactivation request received by the HLR does not contain any basic service group code, the deactivation
request shall apply to all basic services for which CFU is active (see figure 1.8).
If the deactivation request received by the HLR contains a basic service group code, only information
related to the specified basic service group(s) is affected. Note that according to GSM 02.04, a request for
deactivation shall still be accepted even if the CFU supplementary service was already deactivate for all
basic service groups.
The user shall receive a notification of acceptance or rejection of the CFU deactivation request.
The information flow for deactivation of call forwarding unconditional is shown in figure 1.7.
0606&9/5+/5
BBBBBBBBBBBBBBBB
••’HDFWLYDWH&)8••••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••’HDFWLYDWH&)8••••
••••¶¶¶¶¶¶¶¶¶¶¶¶¶¶!••’HDFWLYDWH&)8••
••••••¶¶¶¶¶¶¶¶¶¶¶¶¶!••
•••••••&)8•
••••••$FNQRZOHGJH••
••••$FNQRZOHGJH••¶¶¶¶¶¶¶¶¶¶¶¶¶••
••5HOHDVHFRPSOHWH••¶¶¶¶¶¶¶¶¶¶¶¶¶¶••••
••¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶••••••
••?)DFLOLW\••••••
Figure 1.7: Deactivation of call forwarding unconditional

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ETS 300 543 (GSM 03.82 version 4.8.1): January 1997
Process CFU4 382_18(1)
idle
deactivate
CFU
BS
no
included
in request
yes
set BS =
all BS
CFU
no
active for
subset BS
yes
BIC-Roam or
no
conditional
forwarding
quiescent
yes
make
quiescent
services
operative
set set
error result
acknowledge
 BS:       Basic Service group.
 BIC-Roam: Barring of Incoming Calls when
           Roaming outside the home PLMN country.
idle
Figure 1.8: CFU4 Call forwarding unconditional deactivation
...