1、 ETSI ES 203 021-1 V2.1.1 (2005-08)ETSI Standard Access and Terminals (AT);Harmonized basic attachment requirements for Terminals forconnection to analogue interfaces of the Telephone Networks;Update of the technical contents ofTBR 021, EN 301 437, TBR 015, TBR 017;Part 1: General aspectsETSI ETSI E
2、S 203 021-1 V2.1.1 (2005-08) 2 Reference RES/AT-010108-01 Keywords access, POTS, PSTN, terminal ETSI 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-Prf
3、ecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be 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 v
4、ersions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference 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 t
5、o revision or change of status. Information on the current status of this and other ETSI documents 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_sup
6、port.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade M
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8、1-1 V2.1.1 (2005-08) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 6 2 References 6 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .8 4 Requirements8 4.1 User information 8 4.2 Physical characteristics of the connection to the TN9 4.2.1 PSTN 9 4.2.2
9、 Leased lines with analogue 2-wire interfaces (A2O and A2S) .9 4.2.3 Leased line with analogue 4-wire interfaces(A4O and A4S)10 4.3 Overvoltage 11 4.4 Safety11 4.5 EMC .11 Annex A (informative): Testing.12 A.1 General .12 A.1.1 Test environment12 A.1.2 Powered state12 A.1.3 Measurements to earth13 A
10、.1.4 Equivalent test methods13 A.1.5 Additional information to support the test13 A.2 Test impedances .13 A.2.1 Reference impedance .13 A.2.2 Non-reactive line termination.14 A.2.3 Reference Impedance ZRHF.14 A.3 Feeding bridge14 Annex B (informative): Requirements Table (RT) .16 B.1 Guidance for co
11、mpletion of the RT16 B.1.1 Condition table .16 B.1.2 Requirements table.16 Annex C (informative): Bibliography.18 History 19 ETSI ETSI ES 203 021-1 V2.1.1 (2005-08) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The info
12、rmation pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the
13、 ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). 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
14、000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This ETSI Standard (ES) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document has been produced by ETSI in response to the increasi
15、ng world-wide use of ETSI TBR documents, and the request of the experts in the area to maintain their technical contents in light of the change of the regulatory regime in Europe. It is the intention of ETSI to maintain the present document, in line with the conclusions of TR 101 844 5. The central
16、document for the development of the present one is TBR 021 6 which was originally produced by ETSI in response to a mandate from the European Commission to satisfy a Council Directive which no longer applies. The present document is part 1 of a multi-part deliverable covering technical updates to th
17、e TBRs as identified below: Part 1: “General aspects“; Part 2: “Basic transmission and protection of the network from harm“; Part 3: “Basic Interworking with the Public Telephone Networks“. NOTE: Standardizes the aspects of interworking with the network. ES 203 021-3 only applies to TE intended for
18、switched networks. Introduction The present document specifies a harmonized set of basic requirements for terminals that will allow them to be connected to analogue interfaces of Telephone Networks (TN) e.g. PSTNs, non-switched “voice band“ leased lines or Private Telephone Networks. It covers all r
19、elevant aspects to ensure network compatibility and connectivity. The existing analogue presentation of Public Switched Telephone Networks (PSTNs) in European countries is technically somewhat different, due to historical reasons. The services being offered to the end users also differ to a certain
20、extent. Although different, the networks, however, have many basic commonalities. By restricting the requirements to cover only the interworking that is essential for the establishment of a call to/from a terminal, the signalling aspects can be simplified and harmonized. During the development of TB
21、R 021 6 and EN 301 437 7 it was also frequently noted that TBR 015 8 and TBR 017 9 specified similar requirements, the products were developed on the same technical basis and apparently all these 4 standards could largely converge in a single one. The continuous use of analogue terminals in world-wi
22、de networks is a measure of the need for such equipment. This type of equipment is undergoing constant and rapid development, and it is therefore imperative that the delay in, and cost of, market introduction caused by the network specific characteristics should be the minimum possible. Otherwise, n
23、ew innovative products may be delayed. Also, countries where the market is comparatively small may never benefit from these products, if the cost of market introduction is too high. ETSI ETSI ES 203 021-1 V2.1.1 (2005-08) 5 According to the former European regulatory regime, Terminal Equipment (TE)
24、intended to be connected to the Public Network was required, among other things, to: not cause harm to the network; be able to interwork with the network in order to set up, hold, modify, charge for and clear down a connection; interwork via the network, in “justified“ (identified in other legislati
25、on) cases. The requirements for Terminal Equipment (TE) in the present document are based on the assumption that the relevant access characteristics of the network comply to or are comparable with ES 201 970 10, which is believed to cover the majority of PSTN implementations. In TBR 021 6 only a sin
26、gle connected terminal was considered, the values in the requirements were based on TE consuming all network resources. In the present document the parallel connection of up to four TE is considered and it is also assumed that only one of them is in the loop state at any one time. EG 201 120 11 give
27、s guidance on the parallel and/or series connection of TE in an installation. As was the case with TBR 021 6 the present document is intended primarily for use within the Pan-European region, however, it is considered that it may be equally applicable on a world wide basis should the relevant author
28、ities or network operators choose to use it. ETSI ETSI ES 203 021-1 V2.1.1 (2005-08) 6 1 Scope The present document is a part of a multi-part deliverable. It specifies basic compatibility and interoperability aspects, including basic transmission, which are applicable to all Terminal Equipment (TE)
29、intended to be connected to analogue interfaces of public or private, switched or non-switched telephone networks. The present document is applicable to a TE which is capable of accessing an analogue telephone network line at the Network Termination Point (NTP). The present document specifies the co
30、nnection arrangements (plug or socket, of the suppliers choice) to be provided by the TE. Any connection/mechanical/wiring adapter that may be required between the terminal and the existing NTP is outside the scope of the present document. The present document is intended to ensure that no harm occu
31、rs to the network. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific
32、reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 TIA/EIA/IS-968 (2001): “Telecommunications - Telepho
33、ne Terminal Equipment - Technical Requirements for Connection of Terminal Equipment to the Telephone Network“. 2 ITU-T Recommendation G.100 (2001): “Definitions used in Recommendations on general characteristics of international telephone connections and circuits“. 3 ISO/IEC 8877 (1992): “Informatio
34、n technology - Telecommunications and information exchange between systems - Interface connector and contact assignments for ISDN Basic Access Interface located at reference points S and T“. 4 ETSI EG 201 450: “Guidance on the identification of Harmonized Standards and/or other technical specificati
35、ons for Radio equipment and Telecommunications Terminal Equipment (R Study of the global usage and acceptance of non-radio TBRs and associated documents“. 6 ETSI TBR 021: “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Teleph
36、one 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“. 7 ETSI EN 301 437: “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the
37、 analogue Public Switched Telephone Networks (PSTNs) of TE supporting the voice telephony service in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling“. 8 ETSI TBR 015: “Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 2-
38、wire analogue leased lines (A2O and A2S); Attachment requirements for terminal equipment interface“. ETSI ETSI ES 203 021-1 V2.1.1 (2005-08) 7 9 ETSI TBR 017: “Business TeleCommunications (BTC); Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S); Attachment requi
39、rements for terminal equipment interface“. 10 ETSI ES 201 970: “Access and Terminals (AT); Public Switched Telephone Network (PSTN); Harmonized specification of physical and electrical characteristics at a 2-wire analogue presented Network Termination Point (NTP)“. 11 ETSI EG 201 120: “Public Switch
40、ed Telephone Network (PSTN); Method of rating terminal equipment so that it can be connected in series and/or in parallel to a Network Termination Point (NTP)“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: connec
41、tion to earth: connection to earth means that all the following points, as applicable are connected to the earth point during measurement: a point in the TE which is intended to be connected to mains earth (in practice this might be carried out by connecting to the earth of the mains source which is
42、 supplying the TE); connector points which are intended to be connected to earth during the normal operation of the apparatus. loop state: state where the TE draws sufficient DC current to activate the exchange Network Termination Point (NTP): physical point at the boundary of the telephone network
43、intended to accept the connection of a TE NOTE: See figure 1 of the present document. Public Switched Telephone Network (PSTN): term is used to describe the ordinary telephone system including subscriber lines, local exchanges and the complete system of trunks and the exchange hierarchy which makes
44、up the network reference impedance ZR: complex impedance made up of 270 in series with a parallel combination of 750 and 150 nF return loss: as described in ITU-T Recommendation G.100 2 Terminal Connection Point (TCP): point of the TE intended to be connected to the TN NOTE: A connection/wiring adap
45、ter may be required between the terminal and the existing national network termination point in individual countries. Such an adapter is outside the scope of the present document (see figure 1). Suitable adapter and/or installation facilities TE TCP NTP TCP interface NTP interface TN Figure 1: Termi
46、nal Connection Point (TCP) and Network Termination Point (NTP) ETSI ETSI ES 203 021-1 V2.1.1 (2005-08) 8 Telephone Network (TN): a telecommunication network mainly exchanging voice band signals NOTE: TN is a general term for PSTN, non-switched leased lines and private telephone networks. Terminal Eq
47、uipment (TE): equipment intended to be connected to the TN; i.e.: to be connected directly to the termination (NTP) of a TN; or to interwork with a TN being connected directly or indirectly to the NTP; in order to send, process or receive information. NOTE 1: The system of connection may be wire, ra
48、dio, optical or other electromagnetical system. NOTE 2: TE intended to be connected to public networks may be subject to particular regulatory treatment, whereas TE intended to be connected to private networks are usually not subject to particular regulatory treatment. 3.2 Abbreviations For the purp
49、oses of the present document, the following abbreviations apply: A2O Ordinary quality voice bandwidth 2-wire analogue leased line A2S Special quality voice bandwidth 2-wire analogue leased line A4O Ordinary quality voice bandwidth 4-wire analogue leased line A4S Special quality voice bandwidth 4-wire analogue leased line AC Alternating Current DC Direct Current DTMF Dual Tone Multi-Frequency EMC ElectroMagnetic Compatibility LVD Low Voltage Directive NTP Network Termination Point PSTN Public Switched Telephone N
