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Report on ETSI activities: 1) NGN in ETSI 2) Interconnection of Services DOCUMENT #:GSC13-GTSC6-02r2 FOR:Presentation SOURCE:ETSI AGENDA ITEM:4.1

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Presentation on theme: "Report on ETSI activities: 1) NGN in ETSI 2) Interconnection of Services DOCUMENT #:GSC13-GTSC6-02r2 FOR:Presentation SOURCE:ETSI AGENDA ITEM:4.1"— Presentation transcript:

1 Report on ETSI activities: 1) NGN in ETSI 2) Interconnection of Services DOCUMENT #:GSC13-GTSC6-02r2 FOR:Presentation SOURCE:ETSI AGENDA ITEM:4.1 CONTACT(S) Submission Date: July 13, 2008 Presenter: Ian Spiers

2 NGN in TISPAN Common IMS in 3GPP Source: Rainer Muench, TISPAN Chairman 1) NGN in ETSI

3 3 1) TISPAN is … the home of NGN standards TISPAN is the ETSI body that –specifies standards for Fixed networks and internet convergence –developed the Convergence work Item (FMC) –specifies the Next Generation of Networks Many of the participating organisations have their HQs from outside of Europe TISPAN NGN specifications are referenced by the ITU-T Common IMS parts of the TISPAN work are considered in 3GPP specifications as published by ETSI or other OPs Open area: TISPAN NGN specifications can be considered as THE global NGN solution

4 4 An important standards group (and a great one) … –Typically up to 160 participants per meeting –International participation (Europe, Asia, Americas) –Up to +800 documents to treat in 7 WGs during one week –4 plenaries, 4-6 WG meetings, 4-8 ad hocs per year TISPAN is today

5 5 TISPAN Organisation 7 Working Groups –Requirements and Architecture –Protocols –Numbering, Naming, Addressing, Routeing –Home Networks –Testing and Validation –Security –Network Management Hierarchical system for organising and managing the work Oversee activity per topic Collocated Technical Committee Plenaries and full WG meetings (4 times a year) Interim meetings as required and agreed (face-to-face or virtual) Close co-operation with other SDOs, ITU-T, 3GPP, corporate networks (e.g. Ecma), many fora and groups

6 6 ETSI NGN Status Release 1 ………….. Status Complete Release 2 ………….. Nearing completion Release 3…………… Requirement capture and early work progressing Transfer of Work Items for Common IMS All Common IMS related WIs have been transferred to 3GPP, TISPAN monitor progress carefully and take appropriate action if specific problems are identified.

7 7 Resource control (RACS) Network attachment subsystem (NASS) Supplementary services PSTN/ISDN Emulation (PES) IPTV –TS 183 063 on IMS IPTV Stage 3 Core network aspects has been published. –TS 183 064 on IPTV dedicated system Stage 3 has been approved at TISPAN#18 Plenary (03 – 04 July 2008). Numbering, naming, addressing, routeing Home networks and devices Corporate networks and business communication Resource control (RACS) Network attachment subsystem (NASS) Supplementary services PSTN/ISDN Emulation (PES) IPTV –TS 183 063 on IMS IPTV Stage 3 Core network aspects has been published. –TS 183 064 on IPTV dedicated system Stage 3 has been approved at TISPAN#18 Plenary (03 – 04 July 2008). Numbering, naming, addressing, routeing Home networks and devices Corporate networks and business communication Some key work areas in NGN R2

8 8 ETSI TISPAN NGN Release 3 Early requirements for the next TISPAN Release include –VoIP Consolidation (including QoS, security, interworking) –IPTV Service evolution (blended services and beyond) –Consolidation of the work on business communication –Ultra Broadband (fixed and wireless) access to the NGN Work progressing on Non-3GPP access systems –Improvements to Release 2, e.g. resource control –Interconnection (NGN, NGCN) –Network Harmonisation - increase interoperability with other NGNs and other networks (non IMS).

9 9 Numbering, Naming and Addressing TISPAN WG4 have investigated the need to introduce a Naming Address Resolution (NAR) framework into TISPAN NGN conformant communication networks The following approach was adopted: –Investigation of use cases in the NGN environment to determine required NAR functions –Gap Analysis of current TISPAN NGNs specifications - comparing them to existing/emerging solutions of NAR methods. –Identification of items requiring further standardization based on the above analysis –Analysis of the consequences of creating a Naming Address Resolution framework.

10 10 NGN Interconnection TISPAN is currently working on ENUM & DNS Guidelines that will enable TISPAN to evaluate their requirements against what is set out within the GSMA documents IR34 and IR37. That exercise will provide a firm basis for TISPAN examine their requirements for an Inter-operator IP backbone network and discuss the possibility of a common approach with the GSMA, or alternatively conclude why this isn't the case. ETSI to: –Complete work on ENUM & DNS Guidelines, NGN evolution for interconnection, inter-domain and access reference points, numbering, naming, addressing, routeing and Naming Address Resolution functionality –Identify any critical outstanding issues and propose a way forward, e.g. the need to develop further commercial and administrative arrangements required to facilitate the realisation of an IPX responding to TISPAN requirements –Compare detailed requirements and guidelines against other planned approaches e.g. GSMA –Consider the likelihood of achieving a viable large scale global approach for common IMS providers ETSI is supporting the view that all required parties need to move forward in a coordinated manner. ETSI is supporting collaboration with 3GPP, GSMA, SDOs, ITU-T.

11 11 TISPAN NGN R2 security NGN Security requirements (TS 187 001) –Defines also security requirements for IPTV, Business Communication, Media Security, Home Networking, and for countering UC NGN eTVRA (TR 187 002) –Threat and risk analyses for specific NGN use cases such as NAT traversal, RACS, Media Security, and Unsolicited Communication; NGN Security architecture (TS 187 003) –Defining the security architecture for IPTV, Home Networking, FMC, Media Security, H.248, Corporate Networks Generalised NAT traversal feasibility study (TR 187 008) Media security (TR 187 007) Impact of unsolicited communication in the NGN (TR 187 009) NGN Lawful Interception functional entities, information flow and reference points (TS 187 005) Data retention and its impact on the NGN (TR 187 012)

12 12 Early TISPAN NGN R3 security: Feasibility study on IPTV security architecture –Study models and key management systems for service protection aim to develop the model for the NGN. –Study of functional entities and mechanisms for service protection with the aim to define these for the NGN. –Study of a framework open to the integration of content protection solutions. Feasibility study of security mechanisms for customer premises networks connected to TISPAN NGN.

13 13 Topics for future security work IPTV security (enhancement of stage 2, definition of stage 3) Adding Prevention of Unsolicited Communication as a feature (stage 1, stage 2, stage 3) Identity protection, authentication and integrity countermeasures and to define credential management Media security provisioning (stage 1, stage2) Additional work on NAT-T (e.g. interaction with RACS, interaction with IPTV, security analysis of use of STUN) Enhanced security for NASS, RACS Security for CNG/CND (stage 1, stage 2, stage 3) –Implications for AGCF security Security for NGCN FMC (taking into account requirements of the FMCA) Diameter and Radius AVP profiling Application layer security on the NGN (e.g. TELCO 2.0) Analyse the inter-relation between security features and architecture of the NGN (IPTV, NAT-T, NASS, RACS etc.) in terms of how to employ consistent security architecture and mechanisms Develop general rules, patterns, and templates to ease the employment of the NGN in practice and to facilitate risk control

14 14 Network Management NGN Management –Resource Management (IMS Management imported from 3GPP) –Subscription Management (SuM) –IPTV Management JointSuM –collaboration between ETSI TISPAN WG8, 3GPP SA5, and TM Forum TIP, working on alignment of the Subscription Management and Service Activation specifications in these bodies. Recently, also ITU-T SG 4 has indicated their interest in this work. Collaboration –TM Forum and other de facto bodies are important players in the global telecom management standards arena. Their work is being taken into account in TISPAN WG8.

15 15 Testing Activities Production of manual and automatic test suites to ensure the conformance to TISPAN, 3GPP and ITU standardised protocols. These tests ensure –the global interoperability for and between ISDN and TISPAN NGN Releases incl. PSTN/ISDN Emulation Subsystem, –QoS between networks, –performance benchmarking for NGN Co-operation with –3GPP –ITU (SG 11, SG 12)

16 16 As NGN networks are being rolled out and tested, TISPAN is seeing a large increase in the number of corrections (CRs) to NGN-R1 and R2. This is a good sign. TISPAN (and ETSI) recognises the importance of cooperation agreements and is identifying key bodies and works together to avoid duplication of effort. TISPAN s members are now focused on Rel-2 completion and progressing new work areas for Rel-3. Push ahead with e.g. the Interconnection work, IPTV, home networks, next generation corporate networks, next generation access technologies. Next Steps (in Standards)

17 17 Other PSOs/Challenges Noted that the work on NGN protocols in ITU-T SG 11 is progressing well. It is noted that caution should be taken to ensure that work is not duplicated in PSOs. In general, cooperation with other PSOs is working well. As new features and services are introduced using NGNs, more and more divers players are active on the playing field (e.g. NGN IPTV- Content suppliers-broadcaster etc). This has to be coordinated!

18 NGN Interconnection of Services ETSI Board Strategic Topic Source: Fernando Soriano Claudio Gentile 2) NGN Interconnection of Services

19 19 Introduction Within the topic of Service level Interconnection of NGN Services ETSI: –Intends to give a step forward and to highlight the importance of interconnection at the service level for Next Generation Network –Shows its determination to take the required steps to lead the creation of the interconnection standard –and wiliness to bring all parties together to collaborate in its realization ETSI identified three main areas of work: –Need of Global Standard that covers IP interconnection of NGN services. –Avoiding divergent implementations –And assuring the global interconnection of NGN NGN Interconnection of Services was approved as a strategic topic for 2008 by the General Assembly in November 2007

20 20 Rationale ETSI goal is the re-assure the elaboration of a global Standard for Interconnection of NGN Services. Today interconnection of IP is optimized for Internet. Interconnection of NGN services must take in consideration Telco requirements: –QoS across the whole chain –Payments, according to principles of initiating party pays (or others), premium numbers,… –Reduce complexity of interconnection among operators (and, potentially, thousands of players) to achievable targets And this Interconnection has to be achieved at a global scale Interconnection of NGN affects to a multiple players and organizations, and differences in their approaches may lead to duplication and divergence Out of Scope: Commercial relation itself across the chain of IMS

21 21 GAP Analysis How identified requirements (business oriented) fit with current standardization work on interconnection? Are well covered all aspects? Are there overlapping among the work in technical organizations? Initial study done by TE and TI –Taking as reference the IPX model developed in the GSMA –And the work under progress in 3GPP and ETSI TISPAN –Analyzing aspects related to: Architectural models, network interfaces,… QoS values defined across the IP chain (access, carrier, peering point, codecs,..), including KPI measurement, Security: Define and manage different security levels and profiles Consideration the intermediate figure of the carrier/hub CDR specification and production within the technical infrastructure for settlements among participants Testing to certify interconnection. Etc. Shows that technical work may need to be reviewed, prioritized and better synchronized.

22 22 GAP Analysis: Requirements GSMA IPX Requirements 3GPP Rel-83GPP Rel-9 Inter-Service Provider IP Backbone Requirements Addressing and routing QoS, Authentication and Authorization, Accounting Service Awareness NNI interface enabling direct service interconnection. In Rel-8 no requirements for an IP backbone have been defined. Specification of intermediate backbone must be considered Security: Public Internet, Integrity. Tunnelling, Traffic splitting (UE/SERVER) Requirements not defined in SA1. Network domain security is defined by SA3 (TS 33.210) Should be defined in Rel9 Charging SpecificationRequirement specified in SA1. Offline charging specified in SA5. Should be enhanced in Rel9 Addressing and RoutingRequirements partially defined in SA1 Should be enhanced in Rel9 Service AwarenessRequirement partially specified in SA1 Should be enhanced in Rel9 new scenarios. Transcoding and Media Protocol Conversion Requirement specified in SA1Should be adopted in Rel-9 new scenarios.

23 23 GAP Analysis: Architectures GSMA3GPPTISPAN Direct or Indirect Interconnection (Service/Transport Level) Direct Connection (Rel8) (between CS, IMS cores, not ISP/ASPs) Rel 9 (SA1 starting TR) will cover also indirect interconnection scenarios. Service Interconnection SoIX architecture and use case scenarios defined for both direct and indirect interconnection. Note that IMS Direct Interconnection was tasked to 3GPP (II-NNI) Proposal of a TISPAN IPX. E2E QoS is a must in IPX. Use of Internet discouraged. E2E QoS relies simply on overprovisioning and marking of User Plane IP packets (using DiffServ). Both Internet and e2e QoS based models (inter-RACS signaling is under definition) TISPAN IPX includes carrier grade service interconnection Mainly targeted to GPRS or I- WLAN roaming and interworking of data services. Direct Interconnection for both IP services or legacy PSTN/PLMN multimedia serv. Interconnection for IP services or legacy PSTN/PLMN. Numerous requirements over IPX Proxy. No technical definition for IPX proxyNo technical definition for IPX proxy. Some requirements over operator Border Nodes (screening, firewall, GRE tunnels) Border Nodes: IBCF + TrGW not fully defined. No Ix interface defined. No firewall/QoS control. No GRE support. Border Nodes: IBCF + RACS + IBGF highly defined. Gq interface: QoS/NAT/Firewall control. No support for GRE tunnels. Interconnection Interfaces (NNI): Radius, MMS, IMS… IMS-NNI (Ici/Izi) under specification SIP-I NNI only starting. NNI Definition ongoing (TR only): either IMS, SIP-I or BICC/IP

24 24 NGN Interconnection Workshop 9 June 2008 - Discussion Importance of IP interconnection growing at all levels –NGN operators, International Carriers, etc. –Regulators –Vendors Presentations from the various organizations provided snapshots of activities GSMA IPX model presented as major piece of requirements IPI Alliance and i3 Forum recently established may provide additional requirements 3GPP Rel 8 to cover –IMS to IMS NNI for direct interconnection –CS to CS based on SIP-I –More complex scenarios including eg use of IPX service/network to be addressed in rel 9 Discussion on the need to look at interconnection of IMS to generic (basic) SIP Roaming support presentation from NTT DoCoMo. More activity to be done as it is expected to influence the evolution of interconnection Presentation from TE and TI provided initial review of the gaps between the GSMA business requirements/models and the standards Interoperability testing (eg in ETSI INT) will have increasing importance once the standards are finalized

25 25 NGN Interconnection Workshop 9 June 2008 - Output Leverage TISPAN experience in this area to cover NGN requirements, not losing the expertise of this and other organizations Need to be aware of developments also in other organizations including ITU and the regional SDOs partners of 3GPP and share ETSI findings also in GSC It is proposed to develop a high level roadmap showing the programs of each organization and the critical relationships over time. This should possibly present the timescale relevant to the major requirements What is the next step? Focus down on a specific case, on a service level NNI, which is critical to be put in place, to be standardized, and discuss that in detail as a next step It was proposed to establish a mailing list to progress the discussion Do not lose the momentum, dont stop ongoing activities while looking at future improvement It was supported the importance of seeking a coherent and coordinated set of standards with global value

26 26 What next Establish the foundations for interconnection of the new generation of IMS services beyond frontiers Technical standard for NGN interconnection of services must be timely available for NGN, coordinated with Common IMS, and IMS services that will be standardize by 3GPP, SDOs, OMA and other organizations Next work requires to continue in the coordinated way initiated in Workshop: –Technical bodies will continue contribution driven from their participants according with their normal procedures –Synchronization through liaisons may have to be reinforce by mixed working groups, follow up sessions or whatever may be decided

27 27 ETSI Please visit or contact ETSI Please visit or contact TISPAN Please visit or contact Open area: TISPAN Please visit or contact Open area:

28 28 TISPAN Supplementary Slides

29 29 IPv6 Testing Level 1 IPv6 Core WI Level 2 IPv6 Mobility WI Level 2 IPv6 to IPv4 WI Level 2 IPv6 Security WI Level 2 Requirements Catalogue WI Level 3 Interoperability WI Level 3 Conformance WI Level 3 TSS & TP WI Level 4 Test Suite WI Level 4 Core TSS & TP Deliverable Core TTCN-3 ATS Deliverable Core Catalogue Deliverable An Example of the Hierarchical System for Organising and Managing the Work

30 30 NGN Feasibility Studies Feed into TISPAN Core Security Documents:

31 31 List of TISPAN Rel-2 deliverables (1/8) Rel-2 Overall Description: Release 2 definition 180 002 Service and Capability Requirements 181 005 NGN Functional Architecture 282 001 IMS General Evolution: IMS Functional architecture282 007 IMS Stage 2 description182 006 IMS Call Control Protocol based on SIP and SDP Stage 3 [3GPP TS 24.229 Rel-7 modified]283 003 H.248 Profile for controlling MRFP in the IMS; Protocol specification [3GPP TS 29.333 Rel-7 modified] 183 031 Common Basic Communication procedures; Protocol specification183 028 Requirements for a NGN Session Control Protocol and analysis of the IMS SIP profile meets these requirements282 016 Interworking between IMS and IP networks (Endorsement of 3GPP TS 29.162)183 021 Diameter-based protocol between CSCF and UPSF/SLF; Signalling flows and protocol details [3GPP TS 29.228 V6.8.0 and 3GPP TS 29.229 V6.6.0, modified]183 033

32 32 List of TISPAN Rel-2 deliverables (2/8) IMS Supplementary Services (ISS): Advice of Charge (AoC): Advice Of Charge (AOC) Stage 3 183 047 Call Completion on Busy Subscriber (CCBS), Call Completion No Reply (CCNR): CCBS, CCNR Stage 3 183 042 Call Waiting (CW): CW Stage 3 183 015 SMS over NGN IMS: Overview of Messaging Services 181 007 Support of SMS over NGN IMS Stage 2 182 021 Support of SMS and MMS over NGN IMS subsystem; Stage 3 [Endorsement of 3GPP TS 24.341 Release 7] 183 051 Messaging service using the IMS: Stage 3: Protocol specifications [Endorsement of 3GPP TS 24.247 Release 6] 183 041 Direct Communication (DC) Service: DC Service Description [Endorsement of OMA-ERELD-PoC-V1] 181 006 DC Architecture and functional description [Endorsement of OMA-AD-PoC-V1] 182 017 DC: SIP Protocol Specification (OMA-TS-POC_ControlPlane-V1, modified and OMA-TS-PoC_UserPlane-V1, modified and OMA-TS-PoC_XDM-V1, modified) 183 045 Customized Originating and Terminating Multimedia Information Presentation (COMIP/CTMIP) and Customized Originating and Terminating Multimedia Information Filtering (COMIF/CTMIF): COMIP/CTMIP and COMIF/CTMIF Requirements Analysis 181 015 Presence Service (Presence): Presence Architecture and functional description 182 008 Presence Architecture and functional description 283 030

33 33 List of TISPAN Rel-2 deliverables (3/8) PSTN/ISDN Simulation Subsystem (PSS): Closed User Group (CUG) Protocol specification 183 054 PSS Communication Diversion (CDIV) Protocol specification183 004 PSS Conference (CONF) Protocol specification183 005 PSS Malicious Communication Identification (MCID) Protocol specification183 016 PSS Terminating Identification Presentation (TIP) and Terminating Identification Restriction (TIR) Protocol specification183 008 PSS Explicit Communication Transfer (ECT) Protocol specification183 029 PSS Multimedia Telephony (MMTel) Stage 1181 002 PSS Voice Call Continuity (VCC) Stage 2182 007 PSS XML Configuration Access Protocol (XCAP) over the Ut interface183 023 PSS Message Waiting Indication (MWI) Protocol specification183 006 PSS Communication HOLD (HOLD) Protocol specification183 010 PSS Anonymous Communication Rejection (ACR) and Communication Barring (CB)183 011 PSS Originating Identification Presentation (OIP) and Originating Identification Restriction (OIR)183 007

34 34 List of TISPAN Rel-2 deliverables (4/8) IP Television (IPTV): Requirements for network transport capabilities to support IPTV services 181 014 Service Layer Requirements to integrate NGN services and IPTV 181 016 IP TV Architecture: Dedicated subsystem for IPTV functions 182 028 IPTV functions supported by the IMS 182 027 IMS-based IPTV stage 3 specification 183 063 Dedicated IPTV subsystem stage 3 specification 183 064 Fixed Mobile Convergence (FMC): FMC Requirements analysis 181 011 Corporate Network: Business Communication Requirements181 019 Core and Enterprise NGN Interaction Scenarios and Architectural Requirements182 023 Hosted Enterprise Services; Architecture and functional description182 024 Business Trunking; Architecture and functional description182 025 Customer Network Gateway (CNG): Services requirements and capabilities for customer networks connected to TISPAN NGN185 005 CNG Architecture and Reference Points185 003 High level customer network architectures185 004 Customer Devices architecture and interfaces and Reference Points185 006 Analysis of protocols for customer networks connected to TISPAN NGN185 007 Analysis of security mechanisms for customer networks connected to TISPAN NGN R2185 008 Architecture and reference points of customer network devices for IPTV services185 009

35 35 List of TISPAN Rel-2 deliverables (5/8) Interconnection and Numbering Rel-2: Interconnect issues related to Numbering Naming and Addressing (NAR)184 006 Naming/Numbering Address Resolution (NAR)184 007 Register of assigned protocol numbers and names183 050 Incorporating Universal Communications Identifier (UCI) support into the specification of Next Generation Networks (NGN)284 004 Accounting and Charging Rel-2: Charging management: Endorsement of 3GPP Rel-7 TS 32.240, 32.260, 32.297, 32.298 and 32.299 (modified)282 010 SIP Transfer of IMS Service Tariff Information; Protocol specification183 058 PSTN/ISDN Emulation Sub-system (PES) Rel-2 Improvements: PES Functional architecture182 012 PES Stage 3 specification183 043 QoS and Overload Control Rel-2: Resource and Admission Control and the (x-RACF) in the Resource and Protocol specification283 026 QoS Rel-2: Requirements for QoS in a NGN 181 018 Architectures for QoS handling 182 022 Overload and Congestion Control (OCC): Control of Processing Overload; Stage 2 Requirements 182 018 OCC Architecture; Part 2: Overload and Congestion control (GOCAP) 283 039-2 OCC Part 4: Adaptative Control for the MGC 283 039-4 OCG Part 5: ISDN overload control at the Access Gateway 283 039-5

36 36 List of TISPAN Rel-2 deliverables (6/8) Network Attachment Sub-System (NASS) Rel-2 Improvements: NASS Functional Architecture282 004 NASS: e2 interface based on the DIAMETER protocol283 035 NASS: a2 interface based on the DIAMETER protocol183 059-1 NASS: User-Network Interface Protocol Definitions183 019 Customer Network Gateway Configuration Function; e3 Interface based upon CWMP183 065 NASS: e4 interface based on the DIAMETER protocol283 034 Resource and Admission Control Subsystem (RACS) Rel-2 Improvements: RACS Functional Architecture282 003 RAS: H.248 Profile for controlling Border Gateway Functions (BGF) Protocol specification283 018 RACS: DIAMETER protocol for session based policy set-up information exchange between the Application Function (AF) and the Service Policy Decision Function (SPDF); Protocol specification Release 2183 017 Re Reference Point; Protocol Specification183 060 Ri' Reference Point; Protocol Specification183 062 H.248 Profile for controlling Access and Residential Gateways283 002 Network Management Rel-2: WG8 Specification Guidelines188 007 NGN Management Network Resource Model (NRM): NRM Part 1: Requirements 188 005-1 NRM Part 2: Information service 188 005-2 NRM Part 3: Solution set 188 005-3

37 37 List of TISPAN Rel-2 deliverables (7/8) NGN Subscription Management (SM): SM Part 1: Requirements188 002-1 SM Part 2: Information Model188 002-2 SM Part 3: Functional Architecture188 002-3 NGN SECurity (SEC) Rel-2: SEC Feasibility study of prevention of unsolicited communication in the NGN187 009 Feasibility study on Media Security in TISPAN NGN187 007 SEC Requirements - Rel-2187 001 SEC Security Architecture; Rel-2187 003 SEC Threat, Vulnerability and Risk Analysis - Rel-2187 002 NGN Release 2 Lawful Interception; Stage 2 definition187 005 Security Miscellaneous: NGN Security; Report on security of identity in the NGN187 010 NGN Security; Method for application of ISO 15408-2 requirements in NGN187 011

38 38 List of TISPAN Rel-2 deliverables (8/8) Interworking Solution for REFER interworking problems183 052 ISDN/SIP interworking183 036 Endorsement of the SIP-ISUP Interworking between the IMS and CS networks [3GPP TS 29.163 (Release 7), modified]283 027 SDP Interworking between SIP/SDP and H.248/SDP183 046 Other Rel-2 aspects H.248 Non-Call Related Procedures and Management System Interaction183 025 H.248 Profile for controlling Trunking Media Gateways (TMG) [Endorsement of 3GPP TS 29.332 (V7.7.0), modified]283 049 Support of Overlap sending v2 in a IMS NGN Release 2183 056 Feasibility study on Out-of-band DTMF transport183 057 NGN Architecture to support emergency communication from citizen to authority182 009 XML Document Management; Architecture and functional description182 011 Testing Rel-2 Network Performance objectives tests for IP-based Voice services102 547 Explicit Communication Transfer (ECT) Testing - Part 1: PICS 186 015-1 Explicit Communication Transfer (ECT) Testing - Part 2: TSS&TP 186 015-2 IMS NNI Interworking Test Specifications; Part 1: Test Purposes for IMS NNI Interworking 186 011-1 IMS NNI Interworking Test Specifications; Part 2: Test Descriptions for IMS NNI Interworking 186 011-2 Interworking between SIP and Bearer Independent Call Control Protocol or ISDN User Part, Profile A and B Part 1: Test Suite Structure and Test Purposes (TSS&TP) 186 002-2

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