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 G.799.1/Y.1451.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (07/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments Other terminal equipment SERIES Y: GLOBAL INFORMA
2、TION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS, INTERNET OF THINGS AND SMART CITIES Internet protocol aspects Interworking Functionality and interface specifications for GSTN transport network equipment for interconnecting GSTN and IP networks Recommendation ITU-T G.799.
3、1/Y.1451.1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIE
4、R TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS
5、 CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 General G.700G.709 Coding of voice and audio signals G.710G.729 Principal characteristics of primary multiplex equipment G.730G.739 Principal characteristics of second order multiplex equipment G.740G.749 Principal characteristics of
6、 higher order multiplex equipment G.750G.759 Principal characteristics of transcoder and digital multiplication equipment G.760G.769 Operations, administration and maintenance features of transmission equipment G.770G.779 Principal characteristics of multiplexing equipment for the synchronous digita
7、l hierarchy G.780G.789 Other terminal equipment G.790G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT G
8、ENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recom. Rec. ITU-T G.799.1/Y.1451.1 (07/2016) i Recommendation ITU-T G.799.1/Y.1451.1 Functionality and interface specifications for GSTN transpor
9、t network equipment for interconnecting GSTN and IP networks Summary Voice and voiceband traffic in international networks has traditionally been transported by circuit switched systems and equipment. With the advent of the networks optimized for the transport of Internet protocol (IP), and as a res
10、ult of its considerable growth and pervasive nature, more and more voice traffic is expected to be carried over IP networks. Given that voice and voiceband services remain a significant part of telecommunications, there is a need to ensure a high quality of service for voice carried in part, or whol
11、ly, via IP. This Recommendation defines interfaces and functionality for equipment (e.g., GSTN to IP gateway, vehicle gateway and integrated access devices) that interconnect GSTN networks at the TDM interface and networks optimized for the transport of IP, such that they will provide the degree of
12、voice quality and interoperability required. This revision provides updated references and clarify its applicability to vehicle gateway and integrated access devices. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.799.1/Y.1451.1 2004-06-13 15 11.1002/1000/7330 2.0 ITU-T G
13、.799.1/Y.1451.1 2016-07-14 16 11.1002/1000/12898 Keywords Bearer interface, echo canceller, end-to-end transmission performance, fax over IP, gateway, integrated access devices (IAD), Internet gateway, Internet protocol, IP gateway, media gateway, media gateway controller, quality of service, signal
14、ling interface, speech coding, signalling interface, TDM, TDM-IP gateway, TIGIN, VoIP, vehicle gateway, voice gateway, voice over IP, voice quality. _ * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique I
15、D. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.799.1/Y.1451.1 (07/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Teleco
16、mmunication 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 As
17、sembly (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 w
18、hich fall 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
19、 this Recommendation 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 l
20、anguage 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 thi
21、s Recommendation 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
22、 of approval 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
23、the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 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 G.799.1/Y.1451.1 (07/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3
24、Terms and definitions . 5 3.1 Terms defined elsewhere 5 3.2 Terms defined in this Recommendation . 5 4 Abbreviations and acronyms 6 5 Conventions 8 6 General description of GSTN transport network equipment for interconnecting GSTN and IP networks (TIGIN) 8 7 Interfaces . 9 7.1 IP bearer interfaces .
25、 10 7.2 GSTN (TDM) bearer interfaces 11 7.3 TIGIN control interfaces 12 7.4 TDM signalling interface . 14 7.5 Management interface 15 8 TIGIN functionality 15 8.1 Signal processing functions 15 8.2 Speech quality 20 8.3 Switching 22 8.4 Clock recovery and synchronization 22 8.5 Security . 22 8.6 Add
26、itional features . 23 8.7 Management functions and management system interfaces 23 Appendix I Overview of the location of TIGIN gateways in end-to-end connections . 29 Appendix II Further information on performance/interworking and synchronization . 31 II.1 Performance/interworking 31 II.2 RTP times
27、tamps 31 Appendix III TIGIN equipment arrangements 32 Appendix IV Mapping of E-model (ITU-T G.107) parameters from IETF RFC 3611 metrics and determining R-factor . 34 IV.1 The E-model . 34 IV.2 Parameters related to delay . 35 IV.3 Parameters related to packet loss 35 IV.4 Parameters related to nois
28、e . 36 IV.5 Parameters related to signal level and loudness . 36 IV.6 Parameters related to Echo . 36 IV.7 Calculating R, MOS-LQ and MOS-CQ values 36 iv Rec. ITU-T G.799.1/Y.1451.1 (07/2016) Page Bibliography. 38 Rec. ITU-T G.799.1/Y.1451.1 (07/2016) 1 Recommendation ITU-T G.799.1/Y.1451.1 Functiona
29、lity and interface specifications for GSTN transport network equipment for interconnecting GSTN and IP networks 1 Scope This Recommendation covers the requirements of equipment that interconnects GSTN networks at the TDM interface and networks optimized for the transport of IP (e.g., GSTN to IP gate
30、way, vehicle gateway and integrated access devices). Such equipment is referred to in this Recommendation as a TIGIN gateway. This Recommendation describes functionality such as voiceband coding and echo control, transport interfaces, signalling interfaces, and OA users of this Recommendation are th
31、erefore encouraged to investigate the possibility of applying 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 st
32、and-alone document, the status of a Recommendation. ITU-T G.109 Recommendation ITU-T G.109 (1999), Definition of categories of speech transmission quality. ITU-T G.114 Recommendation ITU-T G.114 (2003), One-way transmission time. ITU-T G.168 Recommendation ITU-T G.168 (2015), Digital network echo ca
33、ncellers. ITU-T G.177 Recommendation ITU-T G.177 (1999), Transmission planning for voiceband services over hybrid Internet/PSTN connections. ITU-T G.701 Recommendation ITU-T G.701 (1993), Vocabulary of digital transmission and multiplexing and pulse code modulation (PCM) terms. ITU-T G.703 Recommend
34、ation ITU-T G.703 (2016), Physical/electrical characteristics of hierarchical digital interfaces. 2 Rec. ITU-T G.799.1/Y.1451.1 (07/2016) ITU-T G.704 Recommendation ITU-T G.704 (1998), Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels. ITU-T G.707 Reco
35、mmendation ITU-T G.707/Y.1322 (2007), Network node interface for the synchronous digital hierarchy (SDH). ITU-T G.711 Recommendation ITU-T G.711 (1988), Pulse code modulation (PCM) of voice frequencies. ITU-T G.711ApI Recommendation ITU-T G.711 Appendix I (1999), A high quality low-complexity algori
36、thm for packet loss concealment with G.711. ITU-T G.711-ApII Recommendation ITU-T G.711 Appendix II (2000), A comfort noise payload definition for ITU-T G.711 use in packet-based multimedia communication systems. ITU-T G.723.1 Recommedation ITU-T G.723.1 (2006), Dual rate speech coder for multimedia
37、 communications transmitting at 5.3 and 6.3 kbit/s. ITU-T G.723.1A Recommendation ITU-T G.723.1 Annex A (1996), Silence compression scheme. ITU-T G.726 Recommendation ITU-T G.726 (1990), 40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM). ITU-T G.727 Recommendation ITU-T G.727
38、 (1990), 5-, 4-, 3- and 2-bit/sample embedded adaptive differential pulse code modulation (ADPCM). ITU-T G.728 Recommendation ITU-T G.728 (1992), Coding of speech at 16 kbit/s using low-delay code excited linear prediction. ITU-T G.728A Recommendation ITU-T G.728 Annex I (1999), Frame or packet loss
39、 concealment for the LD-CELP decoder. ITU-T G.729 Recommendation ITU-T G.729 (2012), Coding of speech at 8 kbit/s using conjugate-structure algebraic-code-excited linearprediction (CS-ACELP). ITU-T G.729A Recommendation ITU-T G.729 Annex A (1996), Reduced complexity 8 kbit/s CS-ACELP speech codec. I
40、TU-T G.729B Recommendation ITU-T G.729 Annex B (1996), A silence compression scheme for G.729 optimized for terminals conforming to Recommendation V.70. ITU-T G.784 Recommendation ITU-T G.784 (2008), Management aspects of synchronous digital hierarchy (SDH) transport network elements. ITU-T G.811 Re
41、commendation ITU-T G.811 (1997), Timing characteristics of primary reference clocks. ITU-T G.813 Recommendation ITU-T G.813 (2003), Timing characteristics of SDH equipment slave clocks (SEC). ITU-T G.823 Recommendation ITU-T G.823 (2000), The control of jitter and wander within digital networks whic
42、h are based on the 2048 kbit/s hierarchy. ITU-T G.824 Recommendation ITU-T G.824 (2000), The control of jitter and wander within digital networks which are based on the 1544 kbit/s hierarchy. ITU-T G.825 Recommendation ITU-T G.825 (2000), The control of jitter and wander within digital networks whic
43、h are based on the synchronous digital hierarchy (SDH). Rec. ITU-T G.799.1/Y.1451.1 (07/2016) 3 ITU-T G.957 Recommendation ITU-T G.957 (2006), Optical interfaces for equipments and systems relating to the synchronous digital hierarchy. ITU-T H.248.1 Recommendation ITU-T H.248.1 (2013), Gateway contr
44、ol protocol: Version 3. ITU-T H.248.4 Recommendation ITU-T H.248.4 (2009), Gateway control protocol: Transport over Stream Control Transmission Protocol (SCTP). ITU-T H.248.7 Recommendation ITU-T H.248.7 (2004), Gateway control protocol: Generic announcement package. ITU-T H.248.10 Recommendation IT
45、U-T H.248.10 (2001), Gateway control protocol: Media gateway resource congestion handling package. ITU-T H.248.11 Recommendation ITU-T H.248.11 (2013), Gateway control protocol: Media gateway overload control package. ITU-T H.248.25 Recommendation ITU-T H.248.25 (2013), Gateway control protocol: Bas
46、ic CAS packages. ITU-T H.248.30 Recommendation ITU-T H.248.30 (2007), Gateway control protocol: RTCP extended performance metrics packages. ITU-T M.3100 Recommendation ITU-T M.3100 (2005), Generic network information model. ITU-T P.501 Recommendation ITU-T P.501 (2012), Test signals for use in telep
47、honometry. ITU-T P.502 Recommendation ITU-T P.502 (2000), Objective test methods for speech communication systems using complex test signals. ITU-T P.862 Recommendation ITU-T P.862 (2001), Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of
48、 narrow-band telephone networks and speech codecs. ITU-T Q.52 Recommendation ITU-T Q.52 (2001), Signalling between international switching centres and stand-alone echo control devices. ITU-T Q.55 Recommendation ITU-T Q.55 (1999), Signalling between signal processing network equipments (SPNE) and int
49、ernational switching centres (ISC). ITU-T Q.115.0 Recommendation ITU-T Q.115.0 (2002), Protocols for the control of signal processing network elements and functions. ITU-T Q.115.1 Recommendation ITU-T Q.115.1 (2002), Logic for the control of echo control devices and functions. ITU-T Q.310 Recommendations ITU-T Q.310-Q.332 (1988), Specifications of Signalling System R1. ITU-T Q.400 Recommendations ITU-T Q.400-Q.490 (1988), S
