1、ETSI TR I01 941 1.1.1 (2001-06) Technical Report Access and Terminals (AT); Study of the implications of standardization of IP terminals utilizing Ethernet, PSTN and ISDN connection methods 2 ETSI TR 101 941 V1.l.l (2001-06) Reference DTWAT-020002 Keywords access, digital, IP, ISDN, PSTN ETSI 650 Ro
2、ute des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 O0017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloa
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6、ndards Institute 2001. All rights reserved. ETSI 3 ETSI TR 101 941 V1.l.l (2001-06) Contents Intellectual Property Rights 4 Foreword 4 Introduction 4 1 2 3 3.1 3.2 4 5 6 6.1 6.2 6.3 6.4 6.5 6.5.1 6.5.2 6.6 6.7 7 7.1 7.2 7.2.1 7.2.2 Scope 5 References 5 Definitions and abbreviations 6 Definitions 6 A
7、bbreviations 6 The need for standards for IP terminals . 7 Available standards for most common terminals . 7 Related standards and work in progress . 8 ETSI-TIPHON 8 ETSI-STQ . 9 ETSI-SPAN 9 ECMA TC32-TG17 . 10 ITU-T . 11 SG12 . 11 SG16 . 11 TIA . 11 IEEE 802.3af . 13 Proposals for further standardi
8、zation work 14 General . 14 ACTIONS . 14 Acoustics . 14 Powering over Ethernet 14 History . 15 ETSI 4 ETSI TR 101 941 V1.l.l (2001-06) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these esse
9、ntial IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 3 14: “Intellectual Property Rights (IPRs); Essential, orpotentially Essential, IPRs notjed to ETSI in respect OfETSIstandards“, which is available from the ETSI Secretariat. Latest updates ar
10、e available on the ETSI Web server (htt:/!wvw.etsi ordj r). 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 O00 3 14 (or the updates on the ETSI Web server)
11、which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been produced by ETSI Technical Committee Access and Terminals (AT). Introduction With new telephone infrastructures coming up as telephony over CATV networks, Intranets, the Internet we a
12、lso see IP- Telephone terminals, connected via an Ethernet interface, replacing the legacy analogue and digital ISDN phones. To secure the overall quality of the communication system and to maintain certain level of functionality, as e.g. emergency functions, it will be necessary to agree on standar
13、ds for these terminals. For the standardization of IP terminals of course not all work has to be redone. A lot can be learned from what has been established for the analogue and ISDN telephony terminals, see clause 5 for an overview. Further, also other standardization organizations are active in th
14、e area of standards for IP terminals, see clause 6 for an overview. The purpose of the present document is to identi6 possible open gaps in the standardization process for IP terminals and to make proposals for new work items if needed. The present documents aims also to facilitate to the experts in
15、formation on the presently standardization work related with terminals. ETSI 5 ETSI TR 101 941 V1.l.l (2001-06) 1 Scope The present document studies the implications of standardization of IP Terminals utilizing Ethernet, PSTN and ISDN connection methods. 2 Re fe re nces For the purposes of this Tech
16、nical Report (TR) the following references apply: il ETSI EN 301 234 (V1.2.1): “Digital Audio Broadcasting (DAB); Multimedia Object Transfer (MOT) protocol“. ETSI TBR 2 1 : “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Tele
17、phone Networks (PSTNs) of TE (excluding TE supporting the voice telephony service) in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling“. ETSI TBR 3 8: “Public Switched Telephone Network (PSTN); Attachment requirements for a terminal equipment incorpor
18、ating an analogue handset function capable of supporting the justified case service when connected to the analogue interface of the PSTN in Europe“. ETSI TBR 003: “Integrated Services Digital Network (ISDN); Attachment requirements for terminal equipment to connect to an ISDN using ISDN basic access
19、“. ETSI TBR 008: “Integrated Services Digital Network (ISDN); Telephony 3,l kHz teleservice; Attachment requirements for handset terminals“. ITU-T Recommendation G. 177 (1999): “Transmission planning for voiceband services over hybrid InterneVPSTN connections“. ITU-T Recommendation H.248 (2000): “Ga
20、teway control protocol“. ITU-T Recommendation G.711 (1988): “Pulse code modulation (PCM) of voice frequencies“. ITU-T Recommendation G.723 (1988): “Extensions of Recommendation G.72 1 adaptive differential pulse code modulation to 24 and 40 kbith for digital circuit multiplication equipment applicat
21、ion“. ITU-T Recommendation G.729 (1996): “Coding of speech at 8 kbith using conjugate-structure algebraic-code-excited linear-prediction (CS-ACELP)“. ITU-T Recommendation G. 108 (1999): “Application of the E-model: A planning guide“. ITU-T Recommendation H.323 (2000): “Packet-based multimedia commun
22、ications systems“. IEEE 802.3: “IEEE Standard for Information technology-Local and metropolitan area networks- Part 3: Carrier sense multiple access with collision detection (CSMNCD) access method and physical layer specifications. Pl 31 41 51 61 71 SI 91 lo1 111 121 i31 ANSI/TIA/EIA 464-B: “Busines
23、s TeleCommunications (BTC) - Comparison of PBX transmission requirements in standards“. ETSI 6 ETSI TR 101 941 V1.l.l (2001-06) 3 Definitions and abbreviations 3.1 Defi nit ions For the purposes of the present document, the following terms and definitions apply: Public telecommunications network: te
24、lecommunications network used to provide publicly available telecommunications services Copied from: Brussels, 12 July 2000, COM(2000)393, Proposal for a “DIRECTIVE OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL on a common regulatory framework for electronic communications networks and services“. Ar
25、ticle 2: Definitions: For the purposes of this Directive: electronic communications network means transmission systems and, where applicable, switching or routing equipment and other resources which permit the conveyance of signals by wire, by radio, by optical or by other electromagnetic means, inc
26、luding satellite networks, fixed (circuit- and packet-switched, including Internet) and mobile terrestrial networks, networks used for radio and television broadcasting, and cable TV networks, irrespective of the type of information conveyed; electronic communications service means services provided
27、 for remuneration which consist wholly or mainly in the transmission and routing of signals on electronic communications networks, including telecommunications services and transmission services in networks used for broadcasting, but excluding services providing, or exercising editorial control over
28、, content transmitted using electronic communications networks and services; public communications network means an electronic communications network used wholly or mainly for the provision of publicly available electronic communications services. Ab brevi at ions For the purposes of the present doc
29、ument, the following abbreviations apply: ANSI ATM Forum CATV CEN CENELEC DTMF ECMA ECTF ETSI ETSI-SPAN ETSI-TIPHON ICTSB IEC IEEE IETF IMTC IP IPv6 Forum ISDN IS0 ISOC ITU-T American National Standards Institute ATM Forum Community Access Television European Committee for Standardization Committee
30、European de Normalization Electrotechnique Dual Tone Multi Frequency Standardizing Information and Communication Systems Enterprise Computer Telephony Forum European Telecommunication Standardization Institute ETSI-Services and Protocols for Advanced Networks ETSI-Telecommunication and Internet Prot
31、ocol Harmonization Over Networks Information and Communications Technologies (ICT) Standards Board International Electrotechnical Commission Institute of Electrical and Electronics Engineers Internet Engineering Task Force International Multimedia Teleconferencing Consortium Internet Protocol IPv6 F
32、orum Integrated Services Digital Network International Organization for Standardization Internet Society International Telecommunication Union - Telecommunication standardization sector ETSI 7 ETSI TR 101 941 V1.l.l (2001-06) “I Nederlands Normalization Institute PAR Project Authorization request PI
33、SN Private Integrated Services Network POTS Plain Ordinary Telephony Service Softswitch Softswitch consortium TE Terminal Equipment TIA Telecommunications Industry Association 4 The need for standards for IP terminals With new telephone infrastructures coming up as telephony over CATV networks, Intr
34、anets, the Internet we also see IP-Telephone terminals, connected via an Ethernet interface, replacing the legacy analogue and digital ISDN phones. To secure the overall quality of the communication system and to maintain certain level of functionality, as e.g. emergency functions, it will be necess
35、ary to agree on standards for these terminals. For the standardization of IP terminals of course not all work has to be redone. A lot can be learned from what has been established for the analogue and ISDN telephony terminals, see clause 5 for an overview. Further, also other standardization organiz
36、ations are active in the area of standards for IP terminals, see clause 6 for an overview. The purpose of the present document is to identi6 possible open gaps in the standardization process for IP terminals and to make proposals for new work items if needed. The present documents aims also to facil
37、itate to the experts information on the presently standardization work related with terminals. 5 Available standards for most common terminals In the legacy telecommunication network, the most common public offered interfaces are for the Public Switched Telephone Network The analogue presented, comm
38、only designated PSTN or POTS interfaces; and the digital presented, using ISDN techniques. Typical basic standards for terminals to be connected to the above mentioned interfaces are: 0 For analogue presented interfaces, defining basic harmonized terminal conditions for them to: - - 0 For digital pr
39、esented interfaces, defining basic harmonized terminal conditions for them to: - - be connected to the network TBR 21 2, inter-work via the network, if they support a simple voice service with a handset: TBR 38 3. be connected to the network TBR 003 4, inter-work via the network, if they support a s
40、imple voice service with a handset, TBR O08 5. Above referred standards are also very commonly used for private interfaces, e.g. to connect a terminal to a PABX branch interface. Other standards and publications exist with more detailed information in these and related areas. Standardized analogue a
41、nd ISDN telephone terminals are used in public and private telecommunication systems. Besides these standardized terminals, also proprietary analogue and digital terminals are used. The standards for analogue terminals take amongst others care of the following subjects: Acoustical terminal parameter
42、s as: - Loudness ratings; - Echo suppression. ETSI 8 0 Line parameters; ETSI TR 101 941 V1.l.l (2001-06) Impedance; Ring voltage; Ringing frequency; Open line voltage; 0 Line signalling, DTMF. The standards for ISDN terminals take amongst others care of the following subjects: Acoustical terminal pa
43、rameters as: - Loudness ratings; - Echo suppression. 0 Line protocol; 0 ISDNline: Line power; Terminal power consumption: - Normal mode; - Restrictive mode operational/non operational. The standards referred secure that the (voice) communication from endpoint to endpoint over the public network have
44、 a minimum acceptable QoS level, and that the terminals can interoperate with each other. By extension it is commonly assumed that simple private networks and installations do not significantly disturb the QoS offered by PSTN. An other point in the standardization and in some purchasing requirements
45、 established by distribution houses or network operators or even in some national legislations is the capability for an analogue/ISDN voice terminal to stay operational under power fail conditions, to be able to call emergency services. 6 Related standards and work in progress This clause gives an o
46、verview of standardization bodies that are active in areas related to IP terminals and identifies active work items and standards and for IP terminals that are already in place. The information provided by this clause can be used to identi6 the open gaps in the standardization process for IP termina
47、ls, leading to proposals for hture work in clause 7. 6.1 ETSI-TIPHON ETSIs Project TIPHON defines standards and specifications to ensure the interoperability of services built on traditional voice networks with those employing the emerging next generation networks based on Internet Protocol (IP) tec
48、hnology. EP TIPHON specifications also assist in the transparent migration of those services to next generation networks. The project is organized into eight separate working groups, each focused on a specific development phase or specialized topic: WG1 Service Capabilities; 0 WG2 Network Architectu
49、re and Information Flows; 0 WG3 Protocols and Profiles: ETSI 9 ETSI TR 101 941 V1.l.l (2001-06) WG4 Naming and Addressing; WG5 Quality of Service; WG6 Testing and Interoperability; 0 WG7 Mobility; WG8 Security. There is no particular work on IP terminals and the TB is willing to collaborate with TC AT in this area. 6.2 ETSI-STQ The objective of STQ is to ensure the Co-ordination, production (where appropriate) and maintenance of end-to-end speech quality related deliverables, for the timely and economic development of equipment for use with existi
