1、 ETSI TS 101 952-1-1 V1.2.1 (2004-12)Technical Specification Access network xDSL transmission filters;Part 1: ADSL splitters for European deployment;Sub-part 1: Generic specification of the low pass part ofDSL over POTS splittersincluding dedicated annexes for specific xDSL variantsETSI ETSI TS 101
2、952-1-1 V1.2.1 (2004-12) 2 Reference RTS/AT-010111-01-01 Keywords ADSL, VDSL, POTS, splitter 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-Prfect
3、ure 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 vers
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8、-1 V1.2.1 (2004-12) 3 Contents Intellectual Property Rights5 Foreword.5 Introduction 6 1 Scope 7 2 References 7 3 Definitions, symbols and abbreviations .8 3.1 Definitions8 3.2 Symbols9 3.3 Abbreviations .10 4 General functional description of DSL over POTS splitters 10 4.1 Functional diagram.10 5 T
9、esting conditions 12 5.1 DC testing conditions .12 5.1.1 Polarity independence.12 5.1.2 DC feeding conditions (on/off-hook)12 5.2 AC Terminating impedances12 5.2.1 ZRefDSLand ZDSL12 5.2.2 ZRand ZSL.13 5.2.3 ZRHF.13 5.2.4 ZOnHI13 5.2.5 ZOnLI14 5.2.6 Zring14 5.2.7 Ztrip14 5.3 General transmission test
10、 set-up.14 6 Splitter requirements 15 6.1 Options for splitter requirements15 6.1.1 Option A splitters15 6.1.2 Option B splitters16 6.2 DC requirements 16 6.2.1 DC resistance to earth.16 6.2.2 DC insulation resistance between A-wire and B-wire 16 6.2.3 DC series resistance RDC.16 6.2.4 DC signalling
11、16 6.3 Ringing frequency requirements 17 6.3.1 Ringing voltage drop at 25 Hz and 50 Hz.17 6.3.2 Impedance in the presence of ringing at 25 Hz and 50 Hz .17 6.3.3 Total harmonic distortion at 25 Hz and 50 Hz17 6.4 POTS pass band loss requirements (on-hook)18 6.4.1 On-hook requirement for the case of
12、high impedance termination.18 6.4.2 On-hook requirement for the case of low impedance termination18 6.4.2.1 Low impedance on-hook POTS pass band insertion loss18 6.4.2.2 Low impedance on-hook POTS pass band insertion loss distortion .18 6.5 POTS pass band loss requirements (off-hook) .19 6.5.1 Off-h
13、ook POTS pass band insertion loss 19 6.5.2 Off-hook POTS pass band insertion loss distortion19 6.6 POTS pass band return loss requirements (off-hook).19 6.6.1 POTS pass band return loss requirements, option A.20 6.6.2 POTS pass band return loss requirements, option B.20 6.7 Requirements relating to
14、metering pulses at 12 kHz or 16 kHz (optional).20 6.8 Unbalance about Earth .21 6.9 DSL band requirements22 6.9.1 DSL band on-hook isolation between DSL and POTS.22 ETSI ETSI TS 101 952-1-1 V1.2.1 (2004-12) 4 6.9.2 DSL band off-hook isolation between DSL and POTS 23 6.10 Noise 24 6.10.1 POTS band au
15、dible noise level.24 6.10.2 DSL band noise level24 6.11 Distortion25 6.11.1 POTS band intermodulation distortion .25 6.11.2 DSL band intermodulation distortion .25 6.12 Group delay distortion25 6.13 Requirements related to POTS transient effects.26 6.14 Requirements for Common Mode rejection (option
16、al).26 Annex A (normative): DSL specific information28 A.1 Dedicated impedances for specific DSL over POTS variants28 A.1.1 Generic definition of ZDSL, using CDCB, ZRefDSL, CDSL, LDSL.28 A.1.2 Specific values of ZRefDSL,CDSL, LDSLand ZDSLfor ADSL over POTS.29 A.1.3 Specific values of ZRefDSLfor Euro
17、pean VDSL1 over POTS .29 A.1.4 Specific values of ZDSLfor European VDSL1 over POTS, starting at 25kHz.29 A.1.5 Specific values of ZDSLfor European VDSL1 over POTS, starting at 138 kHz30 A.1.6 Specific values of ZDSLfor European VDSL1 over POTS, starting at 900 kHz30 A.1.7 Specific values of ZDSLfor
18、Universal VDSL2 over POTS.30 A.2 Dedicated requirements for ADSL over POTS variants 31 A.3 Dedicated requirements for VDSL over POTS variants 32 Annex B (informative): Test related to POTS transient effects (see clause 6.13) .33 Annex C (informative): Bibliography.34 History 35 ETSI ETSI TS 101 952-
19、1-1 V1.2.1 (2004-12) 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 members and non-members, and can be found in ETSI SR 000 314:
20、 “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.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no
21、 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, essential to the present document. Foreword This Technical
22、Specification (TS) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document is part 1, sub-part 1 of a multi-part deliverable covering Access Network xDSL Transmission Filters, as identified below: Part 1: “ADSL splitters for European deployment“; Sub-part 1:“Gen
23、eric specification of the low pass part of DSL over POTS splitters including dedicated annexes for specific xDSL variants“; Sub-part 2: “Specification of the high pass part of ADSL/POTS splitters“; Sub-part 3: “Specification of ADSL/ISDN splitters“; Sub-part 4: “Specification of ADSL over “ISDN or P
24、OTS“ universal splitters“; Sub-part 5: “Specification for ADSL over POTS distributed filters“. Part 2: “VDSL splitters for European deployment“. NOTE 1: The choice of a multi-part format for the present document is to facilitate maintenance and future enhancements. NOTE 2: The sub-parts 1 and 2 must
25、 be considered together to both specify and test the low pass and the high pass parts of a splitter: Use the present document together with TS 101 952 part 1 sub-part 2 19 and TS 101 952 part 2 sub-part 2 20. We also recommend to use the present document together with the documents on splitter tests
26、 TR 101 953 part 1 sub-part 1 15 and TR 101 953 part 2 sub-part 1 17 TR 101 953 part 1 sub-part 2 and TR 101 953 part 2 sub-part 2 (see bibliography). NOTE 3: Before the publication of the present document, Part 1 covered splitters for ADSL, while part 2 covered splitters for VDSL. As the present do
27、cument covers all DSL over POTS variants, the TS 101 952-2-1 will be made historical, as its updated content has become part of the present document. As listed above the sub-parts 2 to 5 of part 1 are still limited to ADSL, while the part 2 sub-parts 2 and 3 are limited to VDSL. However, in line wit
28、h the present document, which became a generic version, it is the intention to combine the sub-parts 2 and 3 of part 1 and part 2 in generic version for all types of DSL. This work will be done by the committees TM6 and AT-A. When this is achieved, part 2 can be made historical. The present document
29、 is fully in line with initiative “eEurope 2002 - An Information Society For All“, under “The contribution of European standardization to the eEurope Initiative, A rolling Action Plan“ especially under the key objective of a cheaper, faster and secure Internet. ETSI ETSI TS 101 952-1-1 V1.2.1 (2004-
30、12) 6 Introduction Remarks on and limitations of the present document The present document is derived from a previous specification of a lowpass splitter for ADSL over POTS, applicable at the LE (i.e. network) side at the Local Exchange (LE) and at the Terminal Equipment (TE) (i.e. user) side of the
31、 line, for which there was not made any distinction in functionality and requirements at the LE and at the TE side. To make the document more generic, it is now extended for other DSL systems, such as VDSL. However, a number of limitations and remarks should be listed: 1) In the present document, th
32、e requirements are specified for the LE side splitters at the LE and for the corresponding splitter at the TE side. The requirements for splitters at the LE side, but located at the remote cabinet and for the corresponding splitters at the TE side are for further study. 2) The present document does
33、not contain the requirements for splitters, which can handle both POTS and ISDN. These so-called ADSL over “ISDN or POTS“ universal splitters are specified in a separate document. 3) The present document of the DSL over POTS splitter was gained from the experience with passive and static DSL splitte
34、rs, the original state of the art for this application. Also the experience was gained with identical requirements at either side of the line. Therefore, the requirements in the present document are primarily intended for passive and static filters, with identical requirements for the LE side and th
35、e TE side of the line. A diversification between splitters requirements at either side of the line should be possible in the future. 4) Moreover, there are other classes of filters possible, besides passive and static splitters. Such active and/or dynamic filters are composed of other elements than
36、passive components. Active splitters might require different requirements and test methods to be specified. Indeed, the dynamic behaviour of the splitter could allow the requirements to differ depending on the state of the line, e.g. requiring isolation, attenuation, rejection and insertion loss val
37、ues to be adapted to the on-hook and the off-hook state of the line. This is for further study. 5) Furthermore, this version of the DSL splitter requirements is conceived for so-called ADSL EC (Echo Cancelled), which has spectra, with the upstream overlapping the downstream. However, ADSL with FDD (
38、Frequency Division Duplexing) is often preferred as the only ADSL variant for deployment. Similarly VDSL only uses FDD. The FDD variant may allow less splitter isolation from POTS to the DSL system, in certain DSL bands where no local receiver is present, but only TX DSL signals are generated. ETSI
39、ETSI TS 101 952-1-1 V1.2.1 (2004-12) 7 1 Scope The present document specifies requirements and test methods for the low pass part of DSL over POTS splitters. These splitters are intended to be installed at the LE (i.e. network) side of the local loop, either at the local exchange or at a remote cabi
40、net, and at the TE (i.e. user) side near the NTP. In the case of splitters at the TE side, the present document specifies the central splitter that is intended for use at the demarcation point of the customer premises. Splitters with a distributed topology, called distributed filters, are not within
41、 the scope of the present document. The majority of requirements in the present document are generic and applicable to all DSL over POTS central splitters. In the case where any requirements are applicable to only one particular flavour of DSL, this is clearly indicated in the clause describing the
42、requirement. The relevant information about requirements for specific DSL systems is given in annex A. The splitter filter, as specified by the present document, may be implemented as an independent unit, separately from the DSL transceiver, or may be integrated with the DSL termination unit. The sp
43、litter may also be integrated with the base band termination unit (e.g. POTS line card), however this is outside of the scope of the present document. 2 References The following documents contain provisions, which, through reference in this text, constitute provisions of the present document. Refere
44、nces are either specific (identified by date of publication and/or 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 availab
45、le in the expected location might be found at http:/docbox.etsi.org/Reference 1 ETSI TBR 038: “Public Switched Telephone Network (PSTN); Attachment requirements for a terminal equipment incorporating an analogue handset function capable of supporting the justified case service when connected to the
46、analogue interface of the PSTN in Europe“. 2 ETSI TR 102 139: “Compatibility of POTS terminal equipment with xDSL systems“. 3 ITU-T Recommendation O.42: “Equipment to measure non-linear distortion using the 4-tone intermodulation method“. 4 ETSI TBR 021: “Terminal Equipment (TE); Attachment requirem
47、ents for pan-European approval for connection to the analogue Public Switched Telephone 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“. 5 ETSI TR 101 728: “Access and T
48、erminals (AT); Study for the specification of low pass filter section of POTS/ADSL splitters“. 6 ITU-T Recommendation O.41: “Psophometer for use on telephone-type circuits“. 7 ITU-T Recommendation O.9: “Measuring arrangements to assess the degree of unbalance about earth“. 8 Void. 9 ETSI ES 201 970:
49、 “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)“. ETSI ETSI TS 101 952-1-1 V1.2.1 (2004-12) 8 10 ETSI EN 300 659 (all parts): “Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services“. 11 ETSI ES 200 778 (all parts): “Access and Terminals (AT); Analogue access to the Public Swi
