1、 ETSI TR 183 072 V3.1.1 (2010-09)Technical Report Telecommunications and Internet converged Services andProtocols for Advanced Networking (TISPAN);Emulation Services for PSTN Modem CallsETSI ETSI TR 183 072 V3.1.1 (2010-09)2Reference DTR/TISPAN-03215-NGN-R3 Keywords PSTN, SIP, H.248, interworking ET
2、SI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be
3、downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the refe
4、rence shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents
5、 is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permissi
6、on. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2010. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
7、3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned b
8、y the GSM Association. ETSI ETSI TR 183 072 V3.1.1 (2010-09)3Contents Intellectual Property Rights 5g3Foreword . 5g31 Scope 6g31.1 Conventions 6g31.1.1 SDP Offer/Answer protocol variants 6g31.1.2 Configuration (Codec) list 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7
9、g33 Definitions and abbreviations . 9g33.1 Definitions 9g33.2 Abbreviations . 9g33.2.1 Reference Points . 10g34 Problem Statement . 10g35 Example scenario as introduction . 11g36 XoIP bearer services for emulating PSTN modem calls - Existing technologies and recommendations . 13g36.1 Indication and
10、Negotiation of Media Configuration(s) 14g36.2 User plane - Handling of signal processing functions 15g36.2.1 GW behaviour (by SIP VGW, H.248 MG) . 15g36.2.2 GW control of EC and JB (in SIP VGW, H.248 MG) 15g36.2.2.1 H.248 MG . 15g36.2.2.1.1 Echo control 15g36.2.2.1.2 Jitter buffer control 15g36.2.2.
11、2 SIP VGW 15g36.2.2.2.1 Echo control 15g36.2.2.2.2 Jitter buffer control 15g36.2.3 Call control level: indication of EC towards “remote side“ 16g37 Media-type Configurations for PSTN modem calls . 16g37.1 Overview 16g37.1.1 VBDoIP-type specific Configurations 17g37.1.2 FoIP-type specific Configurati
12、ons 17g37.1.2.1 Major Configurations 17g37.1.2.2 Signalled versus provisioned T.38 Configurations . 17g37.2 Preferred Configuration/Codec Lists (PCL) . 17g37.2.1 Basic principles . 17g37.2.2 Signalling aspects . 18g37.3 Interoperability check . 19g37.4 Grouping of multiple media configurations . 19g
13、37.4.1 Introduction. 19g37.4.2 Signalling capabilities for grouped media configurations. 20g37.4.2.1 Call control: SIP/SDP . 20g37.4.2.2 Gateway control: H.248 20g37.4.3 Interworking aspects . 20g37.5 Declaration of dedicated media configurations 20g37.5.1 Introduction. 20g37.5.2 Signalling capabili
14、ties for declaration of media configurations 21g37.5.2.1 Call control: SIP/SDP . 21g37.5.2.2 Gateway control: H.248 21g37.6 Mode transitioning . 21g37.6.1 Introduction. 21g37.6.2 Mode transitioning behaviour . 21g3ETSI ETSI TR 183 072 V3.1.1 (2010-09)47.6.3 Mode transitioning support for V.152 and T
15、.38 emulation services . 22g38 Requirements analysis 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 (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI
16、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. Foreword T
17、his Technical Report (TR) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). ETSI ETSI TR 183 072 V3.1.1 (2010-09)61 Scope The present document specifically describes the framework of IP emulation services
18、for PSTN modem call types. The present document provides, inter alia, a description of: the problem statement; summary of IP bearer services; overview of media-type configurations; and a collection of example network use cases; for PSTN modem calls. 1.1 Conventions 1.1.1 SDP Offer/Answer protocol va
19、riants The present document provides example signalling syntax. There are two models for the Session Description Protocol (SDP) concerning the indication and negotiation of media and transport capabilities: the name “legacy SDP Offer/Answer“ indicates SDP Offer/Answer according RFC 3264 i.1; the nam
20、e “revised SDP Offer/Answer“ indicates SDP Offer/Answer according RFC 5939 i.4 and RFC MediaCapNeg i.5. The two SDP Offer/Answer protocol variants differ in terms of supported SDP syntax, but also in terms of negotiation logic on semantical level (see also Annex D). 1.1.2 Configuration (Codec) list
21、The term media configuration (briefly configuration) is more comprehensive than the term codec. A media configuration covers typically media type, media format, all media format attributes, media transport stack, media transport capacity and all associated parameter values. The term configuration li
22、st represents consequently a list of configurations within the SDP media description block. 2 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-specif
23、ic references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid
24、at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. Not applicable. ETSI ETSI TR 183 072 V3.1.1 (2010-09)72.2 Informative references The following referenced
25、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 IETF RFC 3264 (2002): “An Offer/Answer Model with the Session Description Protocol (SDP)“. i.2 IETF RFC 4040 (2005): “RTP Payload Format for a 64 kbit/s Tran
26、sparent Call“. i.3 IETF RFC 4733 (2006): “RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals“. i.4 IETF RFC 5939 (2010): “SDP Capabiliy Negotiation“. i.5 Draft IETF RFC MediaCapNeg (201X): “SDP media capabilities Negotiation“, draft-ietf-mmusic-sdp-media-capabilities. NOTE: MediaCap
27、Neg is a draft version of IETF RFC, the reference will be updated when it is published formally. i.6 Draft IETF RFC MiscCapNeg (201X): “Miscellaneous Capabilities Negotiation in the Session Description Protocol (SDP)“, draft-ietf-mmusic-sdp-misc-cap. NOTE: MiscCapNeg is a draft version of IETF RFC,
28、the reference will be updated when it is published formally. i.7 Draft IETF RFC ConnCapNeg (201X): “Session Description Protocol (SDP) Extension For Setting Up Audio Media Streams Over Circuit-Switched Bearers In The Public Switched Telephone Network (PSTN)“, draft-ietf-mmusic-sdp-cs. NOTE: ConnCapN
29、eg is a draft version of IETF RFC, the reference will be updated when it is published formally. i.8 ITU-T Recommendation G.168: “Digital network echo cancellers“. i.9 ITU-T Recommendation G.711: “Pulse code modulation (PCM) of voice frequencies“. i.10 ITU-T Recommendation V.150.1: “Modem-over-IP net
30、works: Procedures for the end-to-end connection of V-series DCEs“. i.11 ITU-T Recommendation V.151: “Procedures for end-to-end connection of analogue PSTN text telephones over an IP network utilizing text relay“. i.12 ITU-T Recommendation V.152: “Procedures for supporting voice-band data over IP net
31、works“. i.13 ITU-T Recommendation V.153: “Interworking between T.38 and V.152 using IP peering for realtime facsimile services“. i.14 ITU-T Recommendation T.38: “Procedures for real-time Group 3 facsimile communication over IP networks“. i.15 ETSI TS 123 228: “Digital cellular telecommunications sys
32、tem (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228)“. i.16 ETSI TS 124 229: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP multimedia call control protocol
33、based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) (3GPP TS 24.229)“. i.17 ETSI TS 126 114: “Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114)“. i.18 ETSI TS 129
34、238: “Universal Mobile Telecommunications System (UMTS); LTE; Interconnection Border Control Functions (IBCF) - Transition Gateway (TrGW) interface; Ix interface; Stage 3 (3GPP TS 29.238)“. i.19 ETSI TS 129 332: “Universal Mobile Telecommunications System (UMTS); Media Gateway Control Function (MGCF
35、) - IM Media Gateway (IM-MGW); Mn interface (3GPP TS 29.332)“. ETSI ETSI TR 183 072 V3.1.1 (2010-09)8i.20 ETSI TS 182 012: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation Sub-system (PES); Functional architecture“. i.2
36、1 ETSI TS 183 002: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); H.248 Profile Version 3 for controlling Access and Residential Gateways“. i.22 ETSI TS 183 018: “Telecommunications and Internet converged Services and Protocols for Advanced Networ
37、king (TISPAN); Resource and Admission Control: H.248 Profile Version 3 for controlling Border Gateway Functions (BGF) in the Resource and Admission Control Subsystem (RACS); Protocol specification“. i.23 ETSI TS 183 036: “Telecommunications and Internet converged Services and Protocols for Advanced
38、Networking (TISPAN); ISDN/SIP interworking; Protocol specification“. i.24 ETSI TS 183 043: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation; Stage 3 specification“. i.25 ETSI ES 283 003: “Telecommunications and Internet
39、 converged Services and Protocols for Advanced Networking (TISPAN); IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3 3GPP TS 24.229 Release X, modified“. i.26 ETSI ES 283 049: “Telecommunications and Internet converged Serv
40、ices and Protocols for Advanced Networking (TISPAN); H.248 Profile for controlling Trunking Media Gateways (TMG) Endorsement of 3GPP TS 29.332 (V7), modified“. i.27 ETSI TS 129 231: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Application
41、 of SIP-I Protocols to Circuit Switched (CS) core network architecture; Stage 3 (3GPP TS 29.231 version 9.0.0 Release 9)“. i.28 IETF RFC 3388: “Grouping of Media Lines in the Session Description Protocol (SDP)“. i.29 IETF RFC 3407: “Session Description Protocol (SDP) Simple Capability Declaration“.
42、i.30 Draft ITU-T Recommendation H.248.80: “Gateway control protocol: Usage of the revised SDP offer/answer model with H.248“. NOTE: This ITU-T Recommendation is still in work, the reference will be updated when it is published formally. i.31 ITU-T Recommendation Q.115.0: “Protocols for the control o
43、f signal processing network elements and functions“. i.32 ETSI ES 283 012 (V2.1.1): “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Interworking; Trunking Gateway Control Procedures for interworking between NGN and external CS networks Endorsement
44、of 3GPP TS 29.412 (R8)“. i.33 ITU-T Recommendation H.248.31: “Gateway control protocol: Adaptive jitter buffer package“. i.34 IETF RFC 3362 (2002): “Real-time Facsimile (T.38) - image/t38 MIME Sub-type Registration“. i.35 TISPAN Temporary Document 08TD241 (2005-09): “H.248 Trunking GW Profile - Voic
45、eband Data (VBD) Service“. i.36 TISPAN Temporary Document ACWG3-H248 TD08 (2005-11): “H.248 Trunking GW Profile - Progress on clause 5.17.2.3 VBD Procedures“. i.37 ETSI TS 124 292 (V9.3.0): “Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Core Network subsystem Centralized Serv
46、ices; Stage 3 (3GPP TS 24.292 Release 9)“. i.38 ETSI TS 129 163: “Digital cellular telecommunications system (Phase 2+); 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)
47、“. ETSI ETSI TR 183 072 V3.1.1 (2010-09)93 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: PSTN modem call: voiceband data call originating/terminating in a PSTN domain NOTE: The term voiceband data (VBD) is an umbrel
48、la term for all kind of teleservices which using a “data-oriented transport“ in the frequency band of the narrowband voice spectrum (which is a 3,1-kHz-band). The data-oriented transport is realized by modem protocols (definition as in clause 3.13 of ITU-T Recommendation V.152 i.12), as defined e.g.
49、 within the ITU-T V.x-series of Recommendations. Teleservices may be categorized into three major applications areas: facsimile, text-based communication and general data services. XoIP emulation service (for PSTN modem calls): emulation service in IP networks, based on appropriated gateway technologies for interworking voiceband data information between the PSTN and IP networks NOTE: Example emulation services for the three main VBD application areas, which may be su
