ETSI TS 103 397 V1.1.1 (2019-03)

TECHNICAL SPECIFICATION
Core Network and Interoperability Testing (INT);
VoLTE and ViLTE interconnect, interworking and
roaming test specification with QoS/QoE
TM
(3GPP Release 12)

2 ETSI TS 103 397 V1.1.1 (2019-03)

Reference
DTS/INT-00130
Keywords
QoE, QoS, ViLTE, VoLTE
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ETSI
3 ETSI TS 103 397 V1.1.1 (2019-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
Introduction . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 9
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 9
3.3 Abbreviations . 9
4 General principles of interconnection of VoLTE-based networks . 11
4.0 Overview . 11
4.1 E2E scenarios in terms of interworking, interconnection and roaming . 12
4.2 Interconnection and roaming scenarios test selection description (Excel file) . 13
4.2.0 General . 13
4.2.1 First step- "Identification of the Networks" . 13
4.2.2 Second step - Selection Expression . 13
4.2.3 Third step- Access and End Devices Types . 15
4.2.4 Fourth step- activation . 16
4.2.5 Fifth step - Selection of roaming scenarios (not contained in the Excel file) . 17
5 IMS Roaming and Interconnection options (for information). 21
6 VoLTE interconnect and roaming tests . 24
6.1 Test Suite Structure (TSS) . 24
6.2 VoLTE Consideration . 24
6.2.1 EPC Consideration . 24
6.2.2 EPC Configuration Requirements . 25
6.3 Device and U/ISIM consideration . 25
6.3.1 Multi-Mode and Multi-band Terminal . 25
6.3.2 General Requirements for VoLTE Terminal . 25
6.3.2.0 Overview . 25
6.3.2.1 RAN Features . 26
6.3.2.2 IMS function on control plane . 26
6.3.2.3 IMS function on media plane . 26
6.3.2.4 Services Requirements . 26
7 Test purposes . 27
7.0 General . 27
7.1 Testing of SIP protocol requirements . 27
7.1.1 Test purposes for Basic call, Successful . 27
7.1.2 Test purposes for Basic call, DTMF Transport . 49
7.1.3 Test purposes for Basic call, Fax transmission . 50
7.1.4 SIP-I Tests . 53
7.1.5 Codec negotiation . 61
7.1.6 Resource Reservation . 65
7.1.7 Test purposes for SIP-SIP, Basic call, Unsuccessful . 67
7.1.7.1 NNI . 67
7.1.7.2 SIP-I . 73
7.1.8 Test purposes for Supplementary services . 78
7.1.8.1 Test purposes for OIP. 78
7.1.8.2 Test purposes for OIR . 83
7.2 Video Call . 86
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4 ETSI TS 103 397 V1.1.1 (2019-03)
7.2.1 Testing of SIP protocol requirements . 86
7.2.1.1 Test purposes for Basic call, Successful . 86
8 QoS/QoE/Test requirements. 91
8.0 General . 91
8.1 Call set-up time (post dialling delay) . 92
8.2 Listening speech quality . 92
8.2.1 Connections with one voice channel . 92
8.2.2 General aspects of Listening Speech Quality. 94
8.2.3 General aspects of voice channel test calls . 94
8.3 End-to-end audio delay . 97
8.4 End-to-end audio delay variation . 97
8.5 Early media call flow options and listening speech quality . 97
8.5.1 Introduction. 97
8.5.1.0 General . 97
8.5.1.1 Call Flow 1 . 98
8.5.1.2 Call Flow 2 . 99
8.5.2 Early media listening speech quality convergence quality test . 100
8.6 Fax Transmission . 101
8.7 ViLTE KPI . 101
Annex A (informative): Examples of Codecs which can be used in the case of
interworking/roaming . 104
Annex B (informative): Examples for grouped tests . 108
Annex C (informative): Bibliography . 110
History . 111

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5 ETSI TS 103 397 V1.1.1 (2019-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Core Network and Interoperability
Testing (INT).
The test case list and test selection are contained in archive ts_103397v010101p0.zip which accompanies the present
document.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
Voice over LTE (VoLTE) and Video over LTE (ViLTE) are services which deliver voice and video communication
over packet-based networks. VoLTE/ViLTE services can be provided by either traditional fixed or by mobile telecom
operators who have implemented the LTE technology as access technology to its core IP network.

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6 ETSI TS 103 397 V1.1.1 (2019-03)
1 Scope
The present document enables interested parties to verify the VoLTE and ViLTE interworking, interconnection and
roaming of networks by providing e2e scenarios based on an identification and selection of various criteria:
• Identification of the Networks
• Selection of Expression
• Determination of Access and end Device Types
• Selection of roaming scenarios
Additionally the present document provides a series of test suites for quality of service (QoS) and quality of experience
(QoE) based on KPI for voice quality measurements and KPI for voice quality measurements.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 129 165: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Inter-IMS Network to Network Interface (NNI)
(3GPP TS 29.165 Release 12)".
[2] ETSI TS 124 229: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; IP multimedia call control protocol based on Session
Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229
Release 12)".
[3] IETF RFC 4566 (2006): "SDP: Session Description Protocol".
[4] IETF RFC 3261 (2002): "SIP: Session Initiation Protocol".
[5] IETF RFC 3264 (2002): "An Offer/Answer Model with the Session Description Protocol (SDP)".
[6] IETF RFC 3312 (2002): "Integration of Resource Management and Session Initiation Protocol
(SIP)".
[7] ETSI TS 124 607: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Originating Identification Presentation (OIP) and
Originating Identification Restriction (OIR) using IP Multimedia (IM) Core Network (CN)
subsystem; Protocol specification (3GPP TS 24.607 Release 12)".
[8] IETF RFC 5009 (September 2007): "Private header (P-Header) extension to the Session Initiation
Protocol (SIP) for authorization of Early Media".
[9] Recommendation ITU-T V.152 (November 2004): "Procedures for supporting Voice-Band Data
over IP Networks".
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7 ETSI TS 103 397 V1.1.1 (2019-03)
[10] Recommendation ITU-T T.38 (September 2010, prepublished): "Procedures for real-time Group 3
facsimile communication over IP networks".
[11] Recommendation ITU-T Q.1912.5: "SERIES Q: Switching and Signalling and Associated
Measurements and Tests. Specifications of signalling related to Bearer Independent Call Control
(BICC) Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call
Control protocol or ISDN User Part".
[12] ETSI TS 183 036: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); ISDN/SIP interworking; Protocol specification".
[13] IETF RFC 4733: "RTP Payload for DTMF Digits, Telephony Tones and Telephony Signals".
[14] IETF RFC 4028: "Session Timers in the Session Initiation Protocol (SIP)".
[15] ETSI TS 103 222-1 (V1.1.1): "Speech and multimedia Transmission Quality (STQ); Reference
benchmarking, background traffic profiles and KPIs; Part 1: Reference benchmarking, background
traffic profiles and KPIs for VoIP and FoIP in fixed networks".
[16] ETSI TS 101 563 (V1.3.1): "Speech and multimedia Transmission Quality (STQ);
IMS/PES/VoLTE exchange performance requirements".
[17] Recommendation ITU-T Q.543 (03-1993): "Digital exchange performance design objectives".
[18] ETSI ES 202 765-2 (V1.2.1): "Speech and multimedia Transmission Quality (STQ); QoS and
network performance metrics and measurement methods; Part 2: Transmission Quality Indicator
combining Voice Quality Metrics".
[19] ETSI TS 102 250-2 (V2.6.1): "Speech and multimedia Transmission Quality (STQ); QoS aspects
for popular services in mobile networks; Part 2: Definition of Quality of Service parameters and
their computation".
[20] Recommendation ITU-T P.863 (09-2014): "Perceptual objective listening quality assessment".
[21] Recommendation ITU-T P.863.1 (09-2014): "Application guide for Recommendation ITU-T
P.863".
[22] Recommendation ITU-T P.501 (01-2012): "Test signals for use in telephonometry".
[23] ETSI ES 202 737 (V1.4.1): "Speech and multimedia Transmission Quality (STQ); Transmission
requirements for narrowband VoIP terminals (handset and headset) from a QoS perspective as
perceived by the user".
[24] ETSI ES 202 739 (V1.4.1): "Speech and multimedia Transmission Quality (STQ); Transmission
requirements for wideband VoIP terminals (handset and headset) from a QoS perspective as
perceived by the user".
[25] ETSI TS 101 585 (V1.2.1): "Core Network and Interoperability Testing (INT); IMS
interconnection tests at the Ic Interface; Test Suite Structure and Test Purposes (TSS&TP)".
[26] GSMA PRD IR.67: "DNS/ENUM Guidelines for Service Providers & GRX/IPX".
[27] ETSI ES 203 021-3 (V2.1.2): "Access and Terminals (AT); Harmonized basic attachment
requirements for Terminals for connection to analogue interfaces of the Telephone Networks;
Update of the technical contents of TBR 021, EN 301 437, TBR 015, TBR 017; Part 3: Basic
Interworking with the Public Telephone Networks".
[28] Recommendation ITU-T Q.4016 (August 2016): "Testing specification of call establishment
procedures based on SIP/SDP and H.248 for a real-time fax over IP service2".
[29] ETSI TS 126 114 (V13.6.0): "Universal Mobile Telecommunications System (UMTS); LTE; IP
Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP
TS 26.114 version 13.6.0 Release 13)".
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8 ETSI TS 103 397 V1.1.1 (2019-03)
[30] ETSI TS 126 103 (V13.3.0):"Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Speech codec list for GSM and UMTS
(3GPP TS 26.103 version 13.3.0 Release 13)".
[31] ETSI ES 202 667 (V1.1.5): "Speech and multimedia Transmission Quality (STQ); Audiovisual
QoS for communication over IP networks".
[32] Recommendation ITU-T P.910 (April 2008): "Subjective video quality assessment methods for
multimedia applications".
[33] Recommendation ITU-T P.911: "Subjective audiovisual quality assessment methods for
multimedia applications".
[34] IETF RFC 3761 (2004): "The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation
Discovery System (DDDS) Application (ENUM)".
[35] GSMA IR.65 V.28 (May 2018): "IMS Roaming and Interworking Guidelines".
[36] ETSI TS 123 002: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Network architecture (3GPP TS 23.002
version 12.7.0 Release 12)".
[37] ETSI TS 129 235 (V12.1.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); LTE; Interworking between SIP-I based
circuit-switched core network and other networks (3GPP TS 29.235 version 12.1.0 Release 12)".
[38] ETSI TS 123 231 (V12.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); SIP-I based circuit-switched core
network; Stage 2 (3GPP TS 23.231 version 12.0.0 Release 12)".
[39] ETSI TS 129 231 (V12.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Application of SIP-I Protocols to Circuit
Switched (CS) core network architecture; Stage 3 (3GPP TS 29.231 version 12.0.0 Release 12)".
[40] ETSI TS 123 228 (V8.12.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS);
Stage 2 (3GPP TS 23.228 version 8.12.0 Release 8)".
[41] ETSI TS 129 162 (V12.7.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IM CN
subsystem and IP networks (3GPP TS 29.162 version 12.7.0 Release 12)".
[42] ETSI TS 183 043: "Telecommunications and Internet converged Services and Protocols for
Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation; Stage 3 specification".
[43] ETSI TS 129 163 (V12.14.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); LTE; Interworking between the IP
Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP
TS 29.163 version 12.14.0 Release 12)".
[44] Recommendation ITU-T Q.761: "Signalling System No. 7 - ISDN User Part functional
description".
[45] Recommendation ITU-T Q.764: "Q.764: Signalling System No. 7 - ISDN User Part signalling
procedures".
[46] ETSI TS 124 605 (V12.5.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); LTE; Conference (CONF) using IP Multimedia
(IM) Core Network (CN) subsystem; Protocol specification (3GPP TS 24.605 version 12.5.0
Release 12)".
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9 ETSI TS 103 397 V1.1.1 (2019-03)
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EG 202 057-2 (V1.3.2): "Speech and multimedia Transmission Quality (STQ); User related
QoS parameter definitions and measurements; Part 2: Voice telephony, Group 3 fax, modem data
services and SMS".
[i.2] ETSI TR 103 138 (V1.4.1): "Speech and multimedia Transmission Quality (STQ); Speech samples
and their use for QoS testing".
[i.3] ETSI EG 202 425 (V1.1.1): "Speech Processing, Transmission and Quality Aspects (STQ);
Definition and implementation of VoIP reference point".
3 Definition of terms, symbols and abbreviations
3.1 Terms
Void
3.2 Symbols
Void
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
rd
3GPP 3 Generation Partnership Project
ACM Accumulated Call Meter
ACR Anonymous Communication Rejection
ACR-CB Anonymous Call Rejection and Call Barring
AGCF Access Gateway Control Function
AMR Adaptative Multi-Rate
AMR-NB Adaptive Multi Rate - NarrowBand
AMR-WB Adaptive Multi Rate - Wide Band
ANM ANswer Message
APN Access Point Name
ATP Access Transport Parameter
ATS Abstract Test Suite
BCALL Basic CALL
BICC Bearer Independant Call Control
CB Communication Barring
CCBS Completion of Communications to Busy Subscriber
CCNR Completion of Communications by No Reply
CD Communication Deflection
CDIV Communication DIVersion
CDP Charging Determinating Point
CDR Communication Data Record
CFB Communication Forwarding Busy
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10 ETSI TS 103 397 V1.1.1 (2019-03)
CFNL Communication Forwarding Not Logged in
CFNR Communication Forwarding No Reply
CFU Communication Forwarding Unconditional
CONF CONFerence
CPG Call Progress Message
CS Circuit-Switched
CSCF Call Session Control Function
CSFB Circuit Switched Fall Back
CUG Closed User Group
CW Communication Waiting
DRX Discontinuous Reception
DTMF Dual Tone Multi Frequency
ECM EPS Connection Management
ECT Explicit Communication Transfer
ENUM Telephone Number Mapping
FFS For Further Study
GBR Gross Bit Rate
GRX/IPX GPRS Roaming eXchange/IP eXchange
GW GateWay
HEVC High Efficiency Video Coding
HLC High Layer Compatibility
HOLD communication HOLD
HPLMN Home Public Land Mobile Network
HPMN Home Public Mobile Network
IAM Initial Address Message
IBCF Interconnect Border Control Function
II-NNI Inter-IMS Network to Network Interface
IPTV Internal Protocol TeleVision
ISDN Integrated Services Digital Network
ISIM Inter-System Interface Mobility Management
IUT Implementation Under Test
IVR Interactive Voice Response
JPEG Joint Photographic Expert Group
LBO Local Break Out
LI Lawful Interception
LLC Low Layer Compatibility
LPC Linear Predictive Coding
MBR Maximum BitRate
MCID Malicious Communication Identification
MGCF Media Gateway Control Function
MPV Management Protocol Version
MTBF Mean Time Between Failure
MWI Message Waiting Indication
NDUB Network Determined User Busy
NNI Network to Network Interface
OIP Originating Identification Presentation
OIR Originating Identification presentation Restriction
OMR Optimal Media Routeing
OVL OVer-Load point
PASP Public Answering Safety Point
PBX Private Branch eXchange
PCMA Pulse-Code-Modulation- A law
PCMU Pulse Code Modulation µ-law
PCRF Policy and Charging Rule Function
PDD Post Dial Delay
PDN Public Data Network
PGW Packet GateWay
PICS Protocol Implementation Conformance Statement
PRACK Provisional Response Acknowledgement
PS Packet Switched
PSTN Public Switched Telephone Network
QCELP Qualcomm Code-Excited Linear Prediction
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11 ETSI TS 103 397 V1.1.1 (2019-03)
QCI QoS Class Identifier
QCIF Quarter Common Intermediate Format
QoS Quality of Service
R-NNI Roaming Network to Network Interface
RTCP Real Time Control Protocol
SDU Service Data Unit
SIP Session Initiation Protocol
SIP-I Session Initiation Protocol - ISUP (SIP with encapsulated ISUP)
SRVCC Single Radio Voice Call Continuity
SWB Super Wide Band
TBR Technical Basis for Regulation
TIP Terminating Identification Presentation
TIR Terminating Identification Restriction
TMF Management Task Force
TP Test Purpose
TRFO Transcoder free operation
TSS Test Suite Structure
UAC User Agent Client
UDUB User Determined User Busy
UUS The User-to-User Signalling supplementary service
VGW Voice GateWay
VoPS IMS Voice over PS session
VPLMN Visited Public Land Mobile Network
VPMN Visited Public Mobile Network
XCAP eXtended Camel Application Part
4 General principles of interconnection of
VoLTE-based networks
4.0 Overview
Voice over LTE (VoLTE) and Video over LTE (ViLTE) services deliver voice and video communication over packet-
based networks which include LTE technology on the access layer. It means that VoLTE/ViLTE services can be
provided by either traditional fixed or mobile telecom operators who have implemented LTE technology as access
technology to its core IP network.
VoLTE/ViLTE services are so-called "managed" voice and video services which are based on standardized SIP/IMS
signalling and provided by telecom operators, while Over The Top (OTT) applications are services in the Internet
provided by independent third party, without standardized signalling protocols, traffic prioritization and guaranteed
quality of services.
The IMS platform is used as a service control layer which is used for managing VoLTE/ViLTE sessions. The reference
architecture of the IP Multimedia Core Network Subsystem described in ETSI TS 123 002 [36] is shown in figure 4.0-1.
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12 ETSI TS 103 397 V1.1.1 (2019-03)

Figure 4.0-1: Reference Architecture of the IP Multimedia Core Network Subsystem
VoLTE/ViLTE interconnection implies interconnection of IMS platforms for providing VoLTE/ViLTE and legacy e2e
sessions.
Some of the types of interconnection between IMS-based telecom operators:
• Interconnection for delivering sessions amongst users of different operators (hereafter Interworking scenarios);
• Interconnection for providing roaming of users of the Home networks in Visited networks (hereafter Roaming
scenarios).
There are also options for interconnection between the VoLTE/ViLTE and IMS-based networks with existing legacy
networks (e.g. PSTN, PLMN).
The ENUM/DNS translation mechanism as specified in IETF RFC 3761 [34] can be used by all IMS nodes that require
E.164 address to SIP URI resolution and subsequently, the GSMA published PRD IR.67 [26] "DNS and ENUM
Guidelines for Service Providers and GRX/IPX Providers".
4.1 E2E scenarios in terms of interworking, interconnection and
roaming
The tests shall be executed according to the tests case selection expression and the type of end devices which are
contained in the excel test list attached to the present document. The excel list is a normative part of this ETSI standard.
The interconnection and roaming scenarios should be selected depending on the network infrastructure and company
strategy.
The reference configuration depicted in figure 4.1-1 shall be used to perform an interconnection test between two
network operators. Depicted is the reference point to observe the message flow at the 'Ic' interface between the two
networks.
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13 ETSI TS 103 397 V1.1.1 (2019-03)

Figure 4.1-1: Reference configuration for the interconnection test
4.2 Interconnection and roaming scenarios test selection
description (Excel file)
4.2.0 General
The interconnection and roaming test scenarios selection procedure is divided in five steps.
4.2.1 First step- "Identification of the Networks"
During the first step the table "Identification of the Networks" should be completed.
Table 4.2.1-1: Identification of the Networks, with examples

4.2.2 Second step - Selection Expression
During the second step the Selection Expression form sheet should be completed. The Selection Expression depicted in
table 4.2.2-1 was developed to select the scope of the compatibly test between network operator A and network operator
B. By doing that, test purposes are selected automatically. The table shall be filled out (yes/no). This table can be used
as a PICS form as used in a conformance test.
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14 ETSI TS 103 397 V1.1.1 (2019-03)
Table 4.2.2-1: Selection expression applicable in the Test Purposes
SELECTION EXPRESSION Support Support
Network A Network B
Network capabilities
SE 1: The originating network (Network A) sends the P-Charging-Vector
header?
SE 2: The originating network (Network A) sends a subset of parameters in
the P-Charging-Vector header?
SE 3: The P-Early-Media header is supported?
SE 4: Overlap procedure using multiple INVITE method is supported?
SE 5: Overlap sending using in-dialog method is supported?
SE 6: Network A supports the PSTN XML schema?
SE 7: The resource reservation procedure is supported?
SE 8: Does the network perform the "Fall back" procedure (PSTN or
MGCF)?
SE 9: The network is untrusted?
SE 10: Originating network does not have a number portability data base, the
number portability look up is done in the interconnected network?
SE 11: The network supports the REFER method?
SE 12: The Network supports the 3 party call control procedure (REFER
interworking)?
SE 13: The Number Portability is supported?
SE 14: Carrier Selection is performed?
SE 15: The Network is a Long distance carrier?
SE 16: SIP Support of Charging is supported?
SE 17: The interworking ISUP - SIP I is performed in the network?
Supplementary services
SE 18: The network supports the Originating Identification Presentation
(OIP)?
SE 19: The network supports the "Special arrangement" procedure for the
originating user?
SE 20: The network supports the Originating Identification Restriction (OIR)?
SE 21: The Network supports the Terminating Identification Presentation
(TIP)?
SE 22: The network supports the "Special arrangement" procedure for the
terminating user?
SE 23: The Network supports the Terminating Identification Restriction (TIR)?
SE 24: The Network supports the session HOLD procedure?
SE 25: The network supports Communication Forwarding Unconditional
(CFU)?
SE 26: The network supports Communication Forwarding Busy (CFB)?
SE 27: The network supports Communication Forwarding No Reply (CFNR)?
SE 28: The Network supports Communication Forwarding Not Logged in
(CFNL)?
SE 29: The Network supports Communication Deflection?
SE 30: The Network supports the CDIV Notification procedure?
SE 31: The Network supports conference (CONF)?
SE 32: The Network supports the Communication Barring procedure (CB) -
(Black list for incoming calls)?
SE 33: The Network supports the Anonymous Communication Rejection
(ACR)?
SE 34: The Network supports the Closed User Group (CUG)?
SE 35: The Network supports the Communication Waiting (CW) service?

SE 36: The Network supports the T timer?
AS-CW
SE 37: The Network supports Explicit Communication Transfer (ECT)?
SE 38: The network supports Malicious Communication Identification (MCID)?
SE 39: The Network supports Message Waiting Indication (MWI)?
SE 40: The Network supports Completion of Communications to Busy
Subscriber (CCBS)?
SE 41: The Network supports Completion of Communications by No Reply
(CCNR)?
Terminal capabilities
SE 42: Void
SE 43: The End device supports Fax transmission via G.711 codec?
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15 ETSI TS 103 397 V1.1.1 (2019-03)
SELECTION EXPRESSION Support Support
Network A Network B
SE 44: The End device supports Fax transmission via V.152 codec?
SE 45: The End device supports Fax transmission via m-line T.38 codec?
SE 46: A SIP end device is used supporting an ISDN user equipment and the
PSTN XML Schema is used?
SE 47: End device is located in the PSTN or PLMN?
SE 48: The terminating UE supports the from-change tag procedure and

sends a second user identity in an UPDATE request after the dialogue
is confirmed?
SE 49: The end device performs ECT using the 'Blind/assured transfer'?
SE 50: The end device performs ECT using the 'Consultative transfer'?
SE 51: The end device supports the Resource reservation procedure?
PSTN/PLMN Supplementary services
SE 52: CLIP/CLIR is supported in the PSTN/PLMN part of the network?
SE 53: COLP/COLR is supported in the PSTN/PLMN part of the network?
SE 54: HOLD is supported in the PSTN/PLMN part of the network?
SE 55: CDIV is supported in the PSTN/PLMN part of the network?
SE 56: CONF/3PTY is supported in the PSTN/PLMN part of the network?
SE 57: ACR is supported in the PSTN/PLMN part of the network?
SE 58: CUG is supported in the PSTN/PLMN part of the network?
SE 59: CW is supported in the PSTN/PLMN part of the network?
SE 60: ECT is supported in the PSTN/PLMN part of the network?
SE 61: MCID is supported in the PSTN/PLMN part of the network?
SE 61A: Call Completion is supported in the PSTN/PLMN part of the network?
SE 62: SUB is supported in the PSTN/PLMN part of the network?
SE 63: UUS is supported in the PSTN/PLMN part of the network?
SE 64: TP is supported in the PSTN/PLMN part of the network?
DTMF transmission
SE 65: The Network supports DTMF transmission in the RTP stream
SE 65: The Network supports DTMF transmission indicating in the SDP offer
in the RTP stream
SE 67: The Network supports DTMF transmission by the SIP INFO/NOTIFY
Method for DTMF tone generation

4.2.3 Third step- Access and End Devices Types
During the third step the Access and End Devises Types form sheet should be completed. With the specified Test
Purposes in the present document, the compatibility between the interconnected networks and the used access and end
devices Selection Expression shall be assured. Each Test Purpose can be performed by using a physical end device to
assure end-to-end compatibility between the two interconnected networks.
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16 ETSI TS 103 397 V1.1.1 (2019-03)
Table 4.2.3-1: Overview of Accesses and end devices types

4.2.4 Fourth step- activation
In the fourth step in the Test list (table 4.2.4-1) activate the filter "Selected" in row "G" (deactivate the "no" entry). In
addition to hide the title of the test case deselect also the "empty" entry.
Table 4.2.4-1: Test list - example

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17 ETSI TS 103 397 V1.1.1 (2019-03)
4.2.5 Fifth step - Selection of roaming scenarios (not contained in the
Excel file)
According to the general principles described in step 3 (Overview of Access and end devices types), four key e2e
interworking scenarios can be identified (see also table 4.2.5-1):
• VoLTE – IMS interconnection scenarios.
• VoLTE – Legacy network scenarios.
• VoLTE - VoLTE and ViLTE - ViLTE interconnection scenarios.
• VoLTE - VoLTE and ViLTE - ViLTE roaming scenarios.
As for the roaming scenarios the identical interworking are used, the execution of the complete interconnection test list
(see step 4) is not useful. For the applicable roaming scenario(s) the two first test cases (SS_bcall_NNI_01 and
SS_bcall_NNI_02) for different roaming scenario and codecs should be repeated.
For a simplified execution of the tests, the test cases can be grouped. An example of a VoLTE - 2G/3G interconnection
scenario is depicted in annex B.
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18 ETSI TS 103 397 V1.1.1 (2019-03)
Table 4.2.5-1: E2E scenarios in terms of interconnection and roaming
No. Scenario Description Roaming options Calling options
VoLTE - IMS interworking scenarios
1 Scenario 1 The user UE1 (a) is in the IMS network A , UE2 (a) in HPMN The test shall be performed
(a). in both directions
2 Scenario 1A The user UE 1 (a) is in the IMS network A , UE2 (a) in HPMN The test shall be performed
(a) with CSFB (circuit switched fallback). in both directions
See note 1.
3 Scenario 1B The user UE1 (a) is in the IMS network A , UE2 (a) in HPMN The test shall be performed
(a) is moving from 4G to 3G coverage with SRVCC. in both directions
4 Scenario 1C The user UE1 (a) is in the IMS network A , UE2 (a) roamed in The test shall be performed
• Local Breakout VPMN Routing architecture
VPMN (b). (LBO-VR) in both directions
• LBO Home Routing architecture (LBO-HR)
• S8HR VoLTE Roaming architecture
5 Scenario 1D The user UE1 (a) is in the IMS network A , UE2 (a) roamed in The test shall be performed
• Local Breakout VPMN Routing architecture
VPMN (b) moving from 4G to 3G coverage with SRVCC. in both directions
(LBO-VR)
• LBO Home Routing architecture (LBO-HR)
• S8HR VoLTE Roaming architecture
VoLTE - Legacy network scenarios
6 Scenario 2 User UE1 (a) is in the legacy network A , UE2 (a) is in HPMN The test shall be performed
(a). in both directions
7 Scenario 2A User UE1 (a) is in the legacy network A , UE2 (a) is in HPMN The test shall be performed
(a), with CSFB (circuit switched fallback). See note 2. in both directions
8 Scenario 2B User UE1 (a) is in the legacy network A , UE2 (a) is in HPMN The test shall be performed
(a), roamed in VPMN (b) moving from 4G to 3G coverage with in both directions
SRVCC.
9 Scenario 3 User UE1(a) is in the legacy network A , UE2 (a) i
...