1、 ETSI ES 203 021-3 V2.1.2 (2006-01)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 3: Basic Interworking with th
2、e Public Telephone NetworksETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 2 Reference RES/AT-010135 Keywords access, PSTN, terminal, POTS 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
3、non lucratif enregistre la Sous-Prfecture 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 di
4、fference in contents between such versions, 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
5、 that the document may be subject to 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
6、:/portal.etsi.org/chaircor/ETSI_support.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 2006. All rights reserved. DECTTM,
7、 PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizat
8、ional Partners. ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 3 Contents Intellectual Property Rights5 Foreword.5 1 Scope 6 2 References 6 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .8 4 Requirements9 4.1 Parallel connection .9 4.2 Feeding voltage 9 4.3 Requirements in all condit
9、ions: polarity.9 4.4 General requirements in quiescent state .9 4.4.1 DC resistance 9 4.4.2 Characteristics of TE for ringing signals 9 4.4.2.1 Impedance .9 4.4.2.2 Transient response.10 4.4.2.3 DC current.10 4.4.3 Resistance to earth 10 4.4.4 Impedance.10 4.5 Ringing signal detection sensitivity11
10、4.6 Transition from quiescent to loop state 11 4.6.1 Acceptance of breaks in the loop in a call attempt11 4.6.2 Loop current characteristics12 4.6.3 Ring trip13 4.6.4 On-Hook to Off-Hook transition with ringing without DC 13 4.7 Loop steady state characteristics 15 4.7.1 DC characteristics.15 4.7.2
11、Impedance.16 4.7.3 Resistance to earth 16 4.8 Call attempt 16 4.8.1 Automatic dialling 16 4.8.1.1 Dialling without dial tone detection 16 4.8.1.2 Dialling with dial tone detection .17 4.8.2 DTMF signalling 17 4.8.2.1 Frequency combination.17 4.8.2.2 Signalling levels18 4.8.2.2.1 Absolute levels 18 4
12、.8.2.2.2 Level difference.18 4.8.2.3 Unwanted frequency components .18 4.8.2.4 Tone duration 18 4.8.2.5 Pause duration.18 4.8.3 Loop disconnect dialling.18 4.8.4 Register recall .19 4.8.5 Call attempt on a low voltage line 19 4.9 Transition from loop state to quiescent state 19 Annex A (informative)
13、: Test methods.20 A.1 General .20 A.2 Test impedances .20 A.3 Feeding bridge20 A.4 Test methods 20 A.4.1 Parallel connection .20 ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 4 A.4.2 Feeding voltage 20 A.4.3 Requirements in all conditions .20 A.4.4 General requirements in quiescent state .20 A.4.4.1 DC Re
14、sistance.20 A.4.4.2 Characteristics of TE for ringing signals 21 A.4.4.2.1 Impedance .21 A.4.4.2.2 Transient response.22 A.4.4.2.3 DC current.23 A.4.4.3 Resistance to earth 24 A.4.4.4 Impedance.25 A.4.5 Ringing signal detector sensitivity .26 A.4.6 Transition from quiescent state to loop state 26 A.
15、4.6.1 Acceptance of breaks in the loop in a call attempt26 A.4.6.2 Loop current characteristics27 A.4.6.3 Ring trip28 A.4.6.4 On-hook to off-hook transition with ringing without DC .29 A.4.7 Loop steady state characteristics 31 A.4.7.1 DC characteristics.31 A.4.7.2 Impedance.32 A.4.7.3 Resistance to
16、 earth 33 A.4.8 Call attempt 35 A.4.8.1 Automatic dialling 35 A.4.8.1.1 Dialling without dial tone detection 35 A.4.8.1.2 Dialling with dial tone detection .36 A.4.8.2 DTMF signalling 37 A.4.8.2.1 Frequency combinations .37 A.4.8.2.2 Signalling levels38 A.4.8.2.3 Unwanted frequency components .39 A.
17、4.8.2.4 Tone duration 41 A.4.8.2.5 Pause duration.42 A.4.8.3 Loop disconnect dialling.44 A.4.8.4 Register recall .44 A.4.8.5 Call attempt on a low voltage line 44 A.4.9 Transition from loop to quiescent state 45 Annex B (informative): Requirements Table (RT) .46 B.1 Guidance for completion of the RT
18、46 B.1.1 Condition table .46 B.1.2 Requirements Table46 Annex C (informative): Bibliography.49 History 50 ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining
19、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 ETSI Secretariat.
20、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 000 314 (or the upd
21、ates 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 is a minor editorial update of the first version to include text which w
22、as omitted from tables B.1 and B.2. The present document is part 3 of a multi-part deliverable covering technical updates to the 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 Tele
23、phone Networks“. NOTE: Standardizes the aspects of interworking with the network. This part 3 only applies to TE intended for switched networks“. ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 6 1 Scope The present document is a part of a multi-part deliverable. It specifies basic compatibility and interop
24、erability aspects, including basic transmission, which are applicable to all Terminal Equipment (TE) 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
25、 telephone network line at the Network Termination Point (NTP). The present document is intended to ensure correct interworking between network and terminal so that calls can be routed successfully through the network, but without any guarantee of terminal to terminal interoperability. The present d
26、ocument is intended to ensure that no harm occurs 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 v
27、ersion number) or non-specific. For a specific 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 ETSI
28、ES 201 235 (all parts): “Access and Terminals (AT); Specification of Dual-Tone Multi-Frequency (DTMF) Transmitters and Receivers“. 2 ETSI ES 201 970: “Access and Terminals (AT); Public Switched Telephone Network (PSTN); Harmonized specification of physical and electrical characteristics at a 2-wire
29、analogue presented Network Termination Point (NTP)“. 3 ETSI ES 201 187: “2-wire analogue voice band interfaces; Loop Disconnect (LD) dialling specific requirements“. 4 ETSI ES 201 729: “Public Switched Telephone Network (PSTN); 2-wire analogue voice band switched interfaces; Timed break recall (regi
30、ster recall); Specific requirements for terminals“. 5 ETSI EG 201 120: “Public Switched 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)“. 6 ITU-T Recommendation G.100: “Definitions used in Rec
31、ommendations on general characteristics of international telephone connections and circuits“. 7 ETSI TR 101 183: “Public Switched Telephone Network (PSTN); Analogue ringing signals“. 8 ETSI TR 101 041 (all parts): “Human Factors (HF); European harmonization of network generated tones“. 9 ITU-T Recom
32、mendation E.180: “Technical characteristics of tones for the telephone service“. 10 ITU-T Recommendation Q.35: “Technical characteristics of tones for the telephone service“. 11 ETSI ES 203 021-1: “Access and Terminals (AT); Harmonized basic attachment requirements for Terminals for connection to an
33、alogue interfaces of the Telephone Networks; Update of the technical contents of TBR 021, EN 301 437, TBR 015, TBR 017; Part 1: General Aspects“. ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 7 12 ETSI TBR 038: “Public Switched Telephone Network (PSTN); Attachment requirements for a terminal equipment inc
34、orporating an analogue handset function capable of supporting the justified case service when connected to the analogue interface of the PSTN in Europe“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: automatic rep
35、eat call attempt: attempt made by the TE to the same network address as the result of the failure of the previous call attempt and not as a result of an external stimulus to the TE call attempt: process by which the TE seizes the PSTN line and sends signalling characters of the network address with
36、which the TE wishes to communicate connection to earth: 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 sourc
37、e which is supplying the TE); connector points which are intended to be connected to earth during the normal operation of the apparatus. dBV: absolute voltage level expressed in decibels with respect to 1 volt loop state: state where the TE draws sufficient DC current to activate the exchange loop s
38、teady state: loop state excluding the transitions from and to quiescent state Network Termination Point (NTP): physical point at the boundary of the PSTN intended to accept the connection of a TE NOTE: See figure 1. quiescent state: state where the TE draws insufficient DC current to activate the ex
39、change peak to peak voltage: difference between the maximum and minimum voltage during any 10 ms window 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 hier
40、archy which makes up the network reference impedance ZR: harmonized complex impedance made up of 270 in series with a parallel combination of 750 and 150 nF NOTE: This is shown in figure A.1 of ES 203 021-1 11. repeat call attempt: further call attempt to the same network address resulting from a fa
41、ilure to establish connection during the previous call attempt repeat call attempt sequence: series of internally generated automatic repeat call attempts made in response to an initial call attempt NOTE: Additional, but separate, call requests are permitted to initiate separate repeat call attempt
42、sequences. return loss: as defined in ITU-T Recommendation G.100 6, clause 1.22 Telephone Network (TN): telecommunication network mainly exchanging voice band signals NOTE: TN is a general term for PSTN, non-switched leased lines and Private telephone networks. ETSI ETSI ES 203 021-3 V2.1.2 (2006-01
43、) 8 Terminal Connection Point (TCP): point of the TE intended to be connected to the Telephone Network NOTE: An adapter 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
44、figure 1). Suitable adapter installation TE TCP NTP TCP interface NTP interface TN Figure 1: Terminal connection point and network termination point Terminal Equipment (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
45、 with a TN being connected directly or indirectly to the NTP, in order to send, process or receive information. The system of connection may be wire, radio, optical or other electromagnetical system NOTE: TE intended to be connected to public networks may be subject to particular regulatory treatmen
46、t, whereas TE intended to be connected to private networks are usually not subject to particular regulatory treatment. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AC Alternating Current DC Direct Current DTMF Dual Tone Multi-Frequency EMF Electro Mo
47、tive Force LU Loading Units NTP Network Termination Point PSTN Public Switched Telephone Network rms root mean square SLIC Subscriber Line Integrated Circuit TCP Terminal Connection Point TE Terminal EquipmentTN Telephone Network ETSI ETSI ES 203 021-3 V2.1.2 (2006-01) 9 4 Requirements 4.1 Parallel
48、connection As stated in ES 203 021-1 11, although up to four TE are considered for parallel connection, it is assumed that only one of them is in the loop state at any one time. It is assumed that the network driving capability is 100 LU as defined in EG 201 120 5. 4.2 Feeding voltage The feeding vo
49、ltage value of 50 VDC in the requirement and test parts is only a harmonized test value. It does not necessarily reflect the real TN supply voltages. 4.3 Requirements in all conditions: polarity Justification: Interworking with the TN is assured by requiring the TE to operate with both DC polarities, since a fixed polarity is not guaranteed. Requirement: The TE shall conform to the requirements of the present document for both polarities of the DC line feeding voltage. Test: Where tests with both polarities are needed, this is i
