1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Q.4016 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (01/2018) SERIES Q: SWITCHING AND SIGNALLING, AND ASSOCIATED MEASUREMENTS AND TESTS Testing specifications Testing specifications for SIP-IMS Testing specification of c
2、all establishment procedures based on SIP/SDP and ITU-T H.248 for a real-time fax over IP service Recommendation ITU-T Q.4016 ITU-T Q-SERIES RECOMMENDATIONS SWITCHING AND SIGNALLING, AND ASSOCIATED MEASUREMENTS AND TESTS SIGNALLING IN THE INTERNATIONAL MANUAL SERVICE Q.1Q.3 INTERNATIONAL AUTOMATIC A
3、ND SEMI-AUTOMATIC WORKING Q.4Q.59 FUNCTIONS AND INFORMATION FLOWS FOR SERVICES IN THE ISDN Q.60Q.99 CLAUSES APPLICABLE TO ITU-T STANDARD SYSTEMS Q.100Q.119 SPECIFICATIONS OF SIGNALLING SYSTEMS No. 4, 5, 6, R1 AND R2 Q.120Q.499 DIGITAL EXCHANGES Q.500Q.599 INTERWORKING OF SIGNALLING SYSTEMS Q.600Q.69
4、9 SPECIFICATIONS OF SIGNALLING SYSTEM No. 7 Q.700Q.799 Q3 INTERFACE Q.800Q.849 DIGITAL SUBSCRIBER SIGNALLING SYSTEM No. 1 Q.850Q.999 PUBLIC LAND MOBILE NETWORK Q.1000Q.1099 INTERWORKING WITH SATELLITE MOBILE SYSTEMS Q.1100Q.1199 INTELLIGENT NETWORK Q.1200Q.1699 SIGNALLING REQUIREMENTS AND PROTOCOLS
5、FOR IMT-2000 Q.1700Q.1799 SPECIFICATIONS OF SIGNALLING RELATED TO BEARER INDEPENDENT CALL CONTROL (BICC) Q.1900Q.1999 BROADBAND ISDN Q.2000Q.2999 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR THE NGN Q.3000Q.3709 SIGNALLING REQUIREMENTS AND PROTOCOLS FOR SDN Q.3710Q.3899 TESTING SPECIFICATIONS Q.3900Q.4
6、099 Testing specifications for next generation networks Q.3900Q.3999 Testing specifications for SIP-IMS Q.4000Q.4039 Testing specifications for Cloud computing Q.4040Q.4059 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T Q.4016 (01/2018) i Recommendation ITU-T Q.40
7、16 Testing specification of call establishment procedures based on SIP/SDP and ITU-T H.248 for a real-time fax over IP service Summary Recommendation ITU-T Q.4016 contains the testing specification of call establishment procedures based on session initiation protocol (SIP)/session description protoc
8、ol (SDP) and ITU-T H.248 for a real-time fax over IP service. The listed test requirements in this Recommendation have to be interpreted as “minimal requirements“ for fax support between SIP-enabled devices for real-time fax over IP. History Edition Recommendation Approval Study Group Unique ID* 1.0
9、 ITU-T Q.4016 2016-08-29 11 11.1002/1000/13010 2.0 ITU-T Q.4016 2018-01-13 11 11.1002/1000/13491 Keywords Fax, ITU-T G.711, ITU-T T.38, ITU-T V.152, SIP. * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations uniqu
10、e ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Q.4016 (01/2018) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunica
11、tion Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly
12、(WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fa
13、ll within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this R
14、ecommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language
15、 such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recom
16、mendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of app
17、roval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB
18、 patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T Q.4016 (01/2018) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1
19、 Terms defined elsewhere 2 4 Abbreviations and acronyms 3 5 Media-type configurations for PSTN modem calls (from ETSI TR 183 072) . 4 5.1 Overview 4 6 SIP signalling scenarios 8 6.1 SIP signalling scenarios structure . 8 6.2 Pseudo-VBDoIP emulation 12 6.3 Autonomous transitioning with ITU-T V.152 17
20、 6.4 Autonomous state transitioning between voice and facsimile . 36 6.5 ITU-T T.38 strict controlled transitioning (ITU-T T.38 protocol-based switchover) . 40 6.6 Scenario 5 ITU-T T.38 offer in initial INVITE (IAF device) . 73 7 FoIP transmission parameters . 74 7.1 ITU-T T.38 configuration . 74 7.
21、2 DTMF/telephony events . 75 7.3 Different QoS fax test-configurations with default parameters . 77 Annex A PICS . 81 A.1 Roles . 81 A.2 Connection types 81 Annex B PIXIT . 82 REC. ITU-T Q.4016 (01/2018) 1 Recommendation ITU-T Q.4016 Testing specification of call establishment procedures based on SI
22、P/SDP and ITU-T H.248 for a real-time fax over IP service 1 Scope This Recommendation contains the framework of session initiation protocol (SIP) signalling test requirements between SIP-enabled devices for real-time fax over IP (FoIP). Three methods for the support of fax over IP have been identifi
23、ed: 1) Pseudo-VBDoIP emulation; 2) FoIP packet relay with ITU-T T.38: ITU-T T.38, Annex D for call control signalling (SIP/session description protocol (SDP); ITU-T T.38, Annex E for gateway control signalling ITU-T H.248; 3) VBDoIP pass-through method as defined in ITU-T V.152. Where there are disc
24、repancies among this Recommendation, ITU-T T.38, ITU-T V.151, ITU-T V.152 and ITU-T V.153, these other Recommendations take precedence over the text and procedures referred to by this Recommendation. 2 References The following ITU-T Recommendations and other references contain provisions which, thro
25、ugh reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying
26、the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T E.45
27、3 Recommendation ITU-T E.453 (1994), Facsimile image quality as corrupted by transmission-induced scan line errors. ITU-T E.458 Recommendation ITU-T E.458 (1996), Figure of merit for facsimile transmission performance. ITU-T G.168 Recommendation ITU-T G.168 (2015), Digital network echo cancellers. I
28、TU-T G.799.4 Recommendation ITU-T G.799.4 (2014), Procedures for the control of de-jitter buffers used in PSTN-IP gateways carrying voiceband data. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2013), Gateway control protocol: Version 3. ITU-T Q.3403 Recommendation ITU-T Q.3403 (2016), IP multimedia c
29、all control protocol based on the session initiation protocol and the session description protocol. Basic call: Requirements for the user side and network side. ITU-T Q.3629 v.1 Recommendation ITU-T Q.3629 v.1 (2016), Interworking between the IP multimedia core network subsystem and circuit switched
30、 networks Protocol specification. 2 Rec. ITU-T Q.4016 (01/2018) ITU-T T.4 Recommendation ITU-T T.4 (2003), Standardization of Group 3 facsimile terminals for document transmission. ITU-T T.6 Recommendation ITU-T T.6 (1988), Facsimile coding schemes and coding control functions for Group 4 facsimile
31、apparatus. ITU-T T.30 Recommendation ITU-T T.30 (2005), Procedures for document facsimile transmission in the general switched telephone network. ITU-T T.38 Recommendation ITU-T T.38 (2015), Procedures for real-time Group 3 facsimile communication over IP networks. ITU-T T.38 Recommendation ITU-T T.
32、38 (2010), Procedures for real-time Group 3 facsimile communication over IP networks. ITU-T V.150.1 Recommendation ITU-T V.150.1 (2003), Modem-over-IP networks: Procedures for the end-to-end connection of V-series DCEs. ITU-T V.151 Recommendation ITU-T V.151 (2006), Procedures for the end-to-end con
33、nection of analogue PSTN text telephones over an IP network utilizing text relay. ITU-T V.152 Recommendation ITU-T V.152 (2010), Procedures for supporting voice-band data over IP networks. ITU-T V.153 Recommendation ITU-T V.153 (2009), Interworking between Recommendation ITU-T T.38 and ITU-T V.152 u
34、sing IP peering for real-time facsimile services. ETSI TR 183 072 ETSI TR 183 072 V3.1.1 (2010), Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Emulation Services for PSTN Modem Calls. ETSI TS 126 114 ETSI TS 126 114 V12.15.0 (2016), Universal Mobi
35、le Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Multimedia telephony; Media handling and interaction (3GPP TS 26.114 version 12.13.0 Release 12). ETSI TS 129 163 ETSI TS 129 163 V10.19.0 (2016-01), Digital cellular telecommunications system (Phase 2+); Universal Mobile Telec
36、ommunications System (UMTS); LTE; Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networks (3GPP TS 29.163 version 10.19.0 Release 10). IETF RFC 4733 IETF RFC 4733 (2006), RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals. IETF RFC
37、4734 IETF RFC 4734 (2006), Definition of Events for Modem, Fax, and Text Telephony Signals. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 G3 facsimile equipment (G3FE) ITU-T T.38: G3FE refers to any entity which presents a communicati
38、ons interface conforming to ITU-T T.30, ITU-T T.4, and, optionally, ITU-T T.6. A G3FE may be a traditional G3 facsimile machine, an application with an ITU-T T.30 protocol engine, or any of the other possibilities mentioned in the network model for IP facsimile. Rec. ITU-T Q.4016 (01/2018) 3 3.1.2 p
39、seudo-VBDoIP emulation service ITU-T G.799.4: A XoIP emulation service, trying to support voiceband data in audio mode (see clause 3.2.1 of ITU-T V.152), also known as non-V.152 VBDoIP service. 3.1.3 PSTN modem call ETSI TR 183 072: Voiceband data call originating/terminating in a PSTN domain. NOTE
40、The term voiceband data (VBD) is an umbrella 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 V
41、.152), as defined e.g., 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. 3.1.4 ITU-T T.38/G3 ITU-T T.38: ITU-T T.38/G3 refers to an ITU-T T.38 endpoint that supports G3F
42、E, but excludes the ITU-T T.30/V.34 procedures. 3.1.5 ITU-T T.38/V.34G3 ITU-T T.38: ITU-T T.38/ITU-T V.34G3 refers to an ITU-T T.38 endpoint that supports G3FE and includes the ITU-T T.30/V.34 half-duplex procedures. 3.1.6 VBD gateway ITU-T V.152: A media gateway that is compliant with ITU-T V.152.
43、3.1.7 VBDoIP emulation service ITU-T G.799.4: A XoIP emulation service compliant to ITU-T V.152. 3.1.8 voice-band data mode ITU-T V.152: The transport of voice-band data over a voice channel of a packet network with the encoding appropriate for modem signals as defined in clause 6 of ITU-T V.152. 3.
44、1.9 XoIP emulation service (for PSTN modem calls) ETSI TR 183 072: 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, whic
45、h may be summarized as (by using notation “application/transport“): Facsimile/modem: Gateway technologies for PSTN-to-IP interworking see e.g., ITU-T V.152 for pass-through mode and ITU-T T.38 as packet-relay mode; Text/modem: Gateway technologies for PSTN-to-IP interworking see e.g., ITU-T V.152 fo
46、r pass-through mode and ITU-T V.151 as packet-relay mode; and Data/modem: Gateway technologies for PSTN-to-IP interworking see e.g., ITU-T V.152 for pass-through mode and ITU-T V.150.1 as packet-relay mode. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronym
47、s: AGW Access Gateway ATA Analogue Terminal Adapter CED Called station identification CNG Calling tone CPE Customer Premises Equipment DTMF Dual Tone Multi Frequency ETSI European Telecommunications Standards Institute FD Fax Device FEC Forward Error Correction FoIP Fax over IP 4 Rec. ITU-T Q.4016 (
48、01/2018) FOM Figure of Merit G3FE Group 3 Facsimile Equipment HGW Home Gateway IAD Integrated Access Device IAF Internet-Aware Fax IMS IP Multimedia Subsystem ITS IP Telephony Services MGW Media Gateway PSTN Public Switched Telephone Network PT Payload Type QoS Quality of Service RFC Request for Com
49、ment RTP Real-time Transport Protocol SDP Session Description Protocol SIP Session Initiation Protocol UNI User Network Interface VBD Voiceband Data VBDoIP Voiceband Data over IP VGW Voice Gateway (SIP) VoIP Voice over IP XoIP X over IP (with X as placeholder for “IP application protocol X“) 5 Media-type configurations for PSTN modem calls (from ETSI TR 183 072) 5.1 Overview Any SDP Offered Configuration List
