1、 ETSI TS 103 021-2 V1.2.2 (2004-11)Technical Specification 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 2: Basic transmissi
2、on and protection ofthe network from harmETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 2 Reference RTS/AT-010125 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 As
3、sociation but 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 o
4、r perceived difference 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 s
5、hould be aware 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
6、services: http:/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 2004. All rights res
7、erved. DECTTM, 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
8、3GPP Organizational Partners. ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 3 Contents Intellectual Property Rights5 Foreword.5 1 Scope 6 2 References 6 3 Definitions and abbreviations.6 3.1 Definitions6 3.2 Abbreviations .8 4 Requirements8 4.1 Impedance unbalance about earth 8 4.1.1 Quiescent state 8 4.1
9、.2 Loop steady state 9 4.1.2.1 Longitudinal Conversion Loss 9 4.1.2.2 Output Signal Balance.9 4.2 Sending level limitations 9 4.2.1 Mean sending level .9 4.2.2 Instantaneous voltage10 4.2.3 Sending level in a 10 Hz bandwidth .10 4.2.4 Sending level between 4,3 kHz and 200 kHz .11 4.2.5 Sending level
10、 from 200 kHz to 30 MHz.11 4.3 Power feeding limitations.12 4.4 Automatically repeated call attempts .13 Annex A (informative): Test methods.14 A.1 General .14 A.1.1 Acoustic environment for tests.14 A.1.2 Powered state14 A.2 Details for testing of voice stimulated TE14 A.2.1 Voice signal to be used
11、 during tests .14 A.2.1.1 Type of test signal.14 A.2.1.2 Levels15 A.2.2 Electro-acoustic interfaces15 A.2.2.1 Handset .15 A.2.2.2 Hands-free.15 A.2.2.3 Headset .15 A.2.2.4 Other interfaces.16 A.3 Feeding bridge16 A.4 Test methods 16 A.4.1 Impedance unbalance about earth 16 A.4.1.1 Quiescent state 16
12、 A.4.1.2 Loop steady state 17 A.4.1.2.1 Longitudinal Conversion Loss (LCL) .17 A.4.1.2.2 Output Signal Balance.18 A.4.2 Sending level limitations 19 A.4.2.1 Mean sending level .19 A.4.2.2 Instantaneous voltage20 A.4.2.3 Sending level in a 10 Hz bandwidth .21 A.4.2.4 Sending level between 4,3 kHz and
13、 200 kHz .22 A.4.2.5 Sending level from 200 kHz to 30 MHz.23 A.4.3 Power feeding limitations.24 A.4.4 Automatically repeated call attempts .25 Annex B (informative): Requirements Table (RT) .26 ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 4 B.1 Guidance for completion of the RT26 B.1.1 Condition table .2
14、6 B.1.2 Requirements table.26 History 28 ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI m
15、embers 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. Latest updates are available on the ETSI Web server (http:/webapp
16、.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 updates on the ETSI Web server) which are, or may be, or may become,
17、 essential to the present document. Foreword This Technical Specification (TS) 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 was omitted from tables B.1 and B.2. The present documen
18、t is part 2 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 Telephone Network“. NOTE: Standardizes the aspects of inte
19、rworking with the network. This part 3 only applies to TE intended for switched networks. ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 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 a
20、re 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 telephone network line at the Network Termination Point
21、 (NTP). The present document 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/o
22、r edition number or version 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.o
23、rg/Reference. 1 ITU-T Recommendation G.117: “Transmission aspects of unbalance about earth“. 2 ITU-T Recommendation P.59: “Artificial conversational speech“. 3 ITU-T Recommendation G.101: “The transmission plan“. 4 ITU-T Recommendation P.64: “Determination of sensitivity/frequency characteristics of
24、 local telephone systems“. 5 ITU-T Recommendation P.51: “Artificial mouth“. 6 ITU-T Recommendation P.340: “Transmission characteristics and speech quality parameters of hands-free terminals“. 7 ITU-T Recommendation P.38: “Transmission characteristics of Operator Telephone Systems (OTS)“. 8 ETSI TS 1
25、03 021-1: “Access and Terminals (AT); Harmonized basic attachment requirements for Terminals for connection to analogue interfaces of the Telephone Networks; Update of the technical contents of TBR 021, EN 301 437, TBR 015, TBR 017; Part 1: General Aspects“. 3 Definitions and abbreviations 3.1 Defin
26、itions For the purposes of the present document, the following terms and definitions apply: 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
27、 carried out by connecting to the earth of the mains source which is supplying the TE); connector points which are intended to be connected to earth during the normal operation of the apparatus. ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 7 dBV: absolute voltage level expressed in decibels with respect
28、to 1 V longitudinal conversion loss: As described in ITU-T Recommendation G.117 1, clause 4.1.3. loop state: state where the TE draws sufficient DC current to activate the exchange loop steady state: loop state excluding the transitions from and to quiescent state Network Termination Point (NTP): ph
29、ysical point at the boundary of the Telephone Network intended to accept the connection of a TE NOTE: See figure 1. Output Signal Balance (OSB): As described in ITU-T Recommendation G.117 1, clause 4.3.1. peak to peak voltage: difference between the maximum and minimum voltage during any 10 ms windo
30、w quiescent state: state where the TE draws insufficient DC current to activate the exchange Reference Impedance ZR: 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 TS 103 021-1 8. Telephone Network (TN): telecommunication
31、 network mainly exchanging voice band signals NOTE: TN is a general term for PSTN, non-switched leased lines and Private telephone networks. 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 th
32、e 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: Terminal connection point and network termination po
33、int 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 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 w
34、ire, radio, optical or other electromagnetical system. NOTE: 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. ETSI ETSI TS 103 021-2 V1
35、.2.2 (2004-11) 8 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: AC Alternating Current DC Direct Current DTMF Dual Tone Modulation Frequency HFRP Hands-Free Reference Point ICP Installation Connection Point LCL Longitudinal Conversion Loss MRP Mouth Re
36、ference Point NTP Network Termination Point OSB Output Signal Balance PSTN Public Switched Telephone Network rms root mean square TCP Terminal Connection Point TE Terminal EquipmentTN Telephone Network 4 Requirements 4.1 Impedance unbalance about earth 4.1.1 Quiescent state Justification: Protection
37、 of the network from harm. Unbalance may cause crosstalk. The impedance unbalance about earth is expressed as the Longitudinal Conversion Loss (LCL) in this clause. Requirement: The Longitudinal Conversion Loss when the AC termination of the TE is 600 shall be at least the values given in table 1 an
38、d figure 2. Table 1: Unbalance about earth Frequency range Minimum value 50 Hz to 600 Hz 40 dB 600 Hz to 3 400 Hz 46 dB 3 400 Hz to 3 800 Hz 40 dB 4046dB50 600 3 400HzNot to scale3 800Figure 2: Unbalance about earth ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 9 Test: The test shall be conducted accordin
39、g to clause A.4.1.1. 4.1.2 Loop steady state Justification: Protection of the network from harm. Unbalance may cause crosstalk. The impedance unbalance about earth is expressed as Longitudinal Conversion Loss (LCL) when the TE is in the receiving mode and Output Signal Balance (OSB) when in the tran
40、smitting mode. The requirements during the loop steady state apply when the TE has been in the loop state for a minimum of 1,2 s with a line feeding current which can be obtained when the TE is connected to a source of 50 V DC in series with a resistor within the range of 2 800 to 400 . For the purp
41、ose of conducting the test of clauses A.4.1.2 and A.4.2 including all clauses the maximum feed resistance of 2 800 shall be replaced by 2 300 for TE declared to be intended for use only on lines providing a loop current of 18 mA or greater. 4.1.2.1 Longitudinal Conversion Loss Requirement: The LCL w
42、hen the AC termination of the TE is 600 shall be at least the values given in table 1 and figure 2. Test: The test shall be conducted according to clause A.4.1.2.1. 4.1.2.2 Output Signal Balance Requirement: The OSB when the AC termination of the TE is 600 shall be at least the values given in table
43、 1 and figure 2. Test: This requirement will only be completely tested at frequencies where the unbalance level exceeds -70 dBV with the test method shown in clause A.4.1.2.2. Measurement results below -70 dBV will only be noted as compliant, no value will be registered. Voice TE is stimulated by a
44、Pseudo Speech Signal at a level defined in clause A.2.1.2, table A.1, column “Nominal“. 4.2 Sending level limitations These requirements apply to all states except during loop disconnect dialling and register recall signalling. It also does not apply to transient conditions (seizing and releasing th
45、e line), which are not considered states. Justification: Protection of the network from harm is assured by limiting the signal sent by the TE so that the interfering effects of the signal can be predicted and avoided. 4.2.1 Mean sending level This requirement does not apply to DTMF signals. Requirem
46、ent: The mean sending level in the frequency range 200 Hz to 3 800 Hz over a one-minute period shall not be greater than -9,7 dBV when the TE interface is terminated with the reference impedance ZR. Test: The test shall be conducted according to clause A.4.2.1. Voice TE is stimulated by a pseudo spe
47、ech signal at a level defined in clause A.2.1.2, table A.1, column “Nominal“. ETSI ETSI TS 103 021-2 V1.2.2 (2004-11) 104.2.2 Instantaneous voltage Requirement: The peak to peak voltage in the frequency range 200 Hz to 3 800 Hz shall not exceed 5 Vpp when the TE interface is terminated with the refe
48、rence impedance ZR. NOTE: It is recognized that due to the statistical nature of speech signals, the peak to peak voltage level could under some circumstances of real use exceed 5 V. It is recommended that when stimulated with the pseudo speech signal at a level of +10 dBPa, the peak to peak voltage
49、 measured in the frequency band 100 Hz to 20 kHz should not exceed 8,0 V when the TE interface is terminated with the reference impedance ZR. Test: The test shall be conducted according to clause A.4.2.2. Voice terminal is stimulated by a pseudo speech signal at a level defined in clause A.2.1.2, table A.1, column “5 Vpp“. 4.2.3 Sending level in a 10 Hz bandwidth This requirement does not apply to DTMF signals and Voice TE. Requirement: the voltage within a 10 Hz bandwidth centred at any point in the frequency range 30 Hz t
