1、 ETSI TS 101 952-1 V1.1.1 (2009-06)Technical Specification Access network xDSL splittersfor European deployment;Part 1: Generic specification of xDSLover POTS splittersETSI ETSI TS 101 952-1 V1.1.1 (2009-06)2Reference RTS/ATTM-06021 Keywords ADSL, POTS, splitter, VDSL ETSI 650 Route des Lucioles F-0
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8、TSI TS 101 952-1 V1.1.1 (2009-06)3Contents Intellectual Property Rights 6g3Foreword . 6g3Introduction 7g31 Scope 8g32 References 8g32.1 Normative references . 8g32.2 Informative references 9g33 Definitions, symbols and abbreviations . 10g33.1 Definitions 10g33.2 Symbols 11g33.3 Abbreviations . 12g34
9、 General functional description of xDSL over POTS splitters 13g34.1 Functional diagram . 13g34.2 High pass block: three alternatives . 14g35 Circuit definitions, testing conditions and methods . 14g35.1 DC testing conditions . 14g35.1.1 Polarity independence . 14g35.1.2 DC feeding conditions (on/off
10、-hook) 14g35.1.3 DC feeding and loading bridges . 15g35.2 AC terminating impedances ZAC16g35.2.1 ZRefDSLand ZDSL, xDSL transceiver related impedances . 16g35.2.2 ZRand ZSL, off-hook impedances . 16g35.2.3 ZRHF, xDSL band impedance 17g35.2.4 ZOnHI, on-hook high impedance 17g35.2.5 ZOnLI, on-hook low
11、impedance 17g35.2.6 ZOnHo, impedance on-hook 17g35.2.7 ZRing, load impedance for ringing 18g35.2.8 ZMeter, impedance of the metering device 18g35.3 High pass filter implementation . 18g35.3.1 High pass filter alternative B: First order filter . 18g35.3.2 High pass filter alternative C: higher order
12、filter 19g35.3.3 Reference high pass filter . 19g35.4 General transmission test set-up . 19g35.4.1 General definition of the Insertion Loss (IL) measurement 20g35.4.2 POTS signal loss: IL LINE port to POTS port . 20g35.4.3 xDSL signal isolation: IL LINE to POTS port or xDSL to POTS port . 21g35.4.4
13、xDSL signal loss: IL LINE port to xDSL port 21g35.4.5 General definition of the Return Loss . 23g35.4.6 Return Loss test set-up at LINE port and POTS port 24g35.5 Unbalance measurement . 24g35.5.1 General definition of Longitudinal Conversion Loss 24g35.5.2 General definition of Longitudinal Convers
14、ion Transfer Loss . 25g35.5.3 LCL and LCTL test set-up 25g35.6 Noise measurement 26g35.6.1 Psophometric noise in the POTS Band . 26g35.6.2 Noise in the xDSL Band . 27g35.7 Common Mode Rejection Ratio measurement . 27g36 Splitter requirements 27g36.1 Options for splitter requirements 27g36.1.1 Option
15、 A splitters 28g36.1.2 Option B splitters 28g36.2 DC requirements 28g3ETSI ETSI TS 101 952-1 V1.1.1 (2009-06)46.2.1 DC resistance to earth . 28g36.2.2 DC insulation resistance between A-wire and B-wire 29g36.2.3 DC series resistance RDC. 29g36.2.4 DC signalling 29g36.3 Ringing frequency requirements
16、 29g36.3.1 Ringing voltage drop at 25 Hz and 50 Hz . 30g36.3.2 ZInRingimpedance in the presence of ringing at 25 Hz and 50 Hz . 30g36.3.3 Total harmonic distortion at 25 Hz and 50 Hz 30g36.4 POTS pass band loss requirements (on-hook) 30g36.4.1 On-hook requirement for the case of high impedance termi
17、nation . 31g36.4.2 On-hook requirement for the case of low impedance termination 31g36.4.2.1 Low impedance on-hook POTS pass band insertion loss 31g36.4.2.2 Low impedance on-hook POTS pass band insertion loss distortion . 31g36.5 POTS pass band loss requirements (off-hook) . 31g36.5.1 Off-hook POTS
18、pass band insertion loss 32g36.5.2 Off-hook POTS pass band insertion loss distortion 32g36.6 POTS pass band return loss requirements (off-hook) . 32g36.6.1 POTS pass band return loss requirements, option A . 32g36.6.2 POTS pass band return loss requirements, option B . 32g36.7 Requirements relating
19、to metering pulses at 12 kHz or 16 kHz (optional). 33g36.8 Unbalance about Earth . 33g36.8.1 Unbalance of the low pass part . 33g36.8.2 Unbalance of the high pass part for alternative B or C . 34g36.9 xDSL band requirements 34g36.9.1 xDSL band on-hook isolation between LINE and POTS port 35g36.9.2 x
20、DSL band off-hook isolation between LINE and POTS port . 35g36.9.3 Transition band signal loss: IL between POTS port and LINE port (optional) . 36g36.9.4 xDSL signal loss: IL LINE port to xDSL port 36g36.9.4.1 High pass alternatives A and B . 36g36.9.4.2 High pass alternative C . 37g36.10 Noise leve
21、ls 37g36.10.1 POTS band audible noise level . 37g36.10.2 xDSL band noise level 37g36.11 Distortion 37g36.11.1 POTS band intermodulation distortion . 37g36.11.2 Extended xDSL band intermodulation distortion (informative) . 38g36.12 Group delay distortion 38g36.13 POTS transient effects (informative)
22、38g36.14 Requirements for Common Mode Rejection (optional) . 39g36.15 Requirements for Crosstalk at the LE (optional) 39g3Annex A (normative): xDSL specific information . 40g3A.1 ZDSLand ZRefDSLfor specific xDSL over POTS variants 40g3A.1.1 Generic definition of ZDSL, using CDCB, ZRefDSL, CDSLand LD
23、SL. 40g3A.1.2 ZDSLfor ADSL over POTS . 41g3A.1.3 ZDSLfor European VDSL1 over POTS, with US0 starting at 25 kHz 42g3A.1.4 ZDSLfor VDSL2 over POTS with US0 . 42g3A.2 Common requirements for passive POTS splitters 43g3A.3 Specific requirements for passive splitters for ADSL over POTS variants 45g3A.4 S
24、pecific requirements for passive splitters for VDSL1 over POTS variants 46g3A.5 Specific requirements for passive splitters for VDSL2 over POTS variants at the TE side 46g3A.6 Specific requirements for passive splitters for VDSL2 over POTS variants at the LE side 47g3Annex B (informative): Evolution
25、 of the documents . 48g3Annex C (informative): Use of the present document for splitters at the cabinet 49g3Annex D (informative): Intrinsic IL and RL caused by ZDSLin the POTS band 50g3ETSI ETSI TS 101 952-1 V1.1.1 (2009-06)5Annex E (informative): IL Measurement from LINE to xDSL inside ZDSL51g3Ann
26、ex F (informative): Return Loss measurements: practical diagrams. 53g3Annex G (informative): Insertion Loss measured with feeding and loading bridges . 54g3Annex H (informative): Dynamic tests of splitters in the presence of xDSL transceivers (WT-127 of the Broadband Forum) 55g3H.1 General descripti
27、on. 55g3H.2 Detailed description 56g3H.2.1 Static tests under continuous signals according to WT-127 . 57g3H.2.2 Dynamic tests according to WT-127 57g3Annex I (informative): Optimal transmission of POTS and xDSL signals and their separation . 58g3Annex J (informative): More on feeding and loading br
28、idges . 60g3Annex K (informative): Additional requirements for Active Splitter (F.F.S.) 61g3K.1 Bidirectional IL tests 61g3K.2 Noise measurements methods for active splitters 61g3K.2.1 (5.6.1) Psophometric noise in the POTS Band . 61g3K.2.2 (5.6.2) Noise in the xDSL Band . 61g3K.3 (6.10) Noise requi
29、rements for active splitters 61g3K.3.1 (6.10.1) POTS band audible noise level . 62g3K.3.2 (6.10.2) xDSL band noise level 62g3K.4 (6.11) Distortion . 62g3K.5 (6.13) Transitional tests 62g3Annex L (informative): Bibliography . 63g3History 64g3ETSI ETSI TS 101 952-1 V1.1.1 (2009-06)6Intellectual Proper
30、ty 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: “Intellectual Property Rights (IPRs); Ess
31、ential, 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 investigation, including IPR searches, ha
32、s 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 Specification (TS) has been produced by ET
33、SI Technical Committee Access, Terminals, Transmission and Multiplexing (ATTM). The present document is part 1 of a multi-part deliverable covering Access network xDSL splitters for European deployment, as identified below: Part 1: “Generic specification of xDSL over POTS splitters“; Part 2: “Generi
34、c specification of xDSL over ISDN splitters and xDSL universal splitters“; Part 3: “Generic specification of distributed filters for xDSL over POTS“; Part 4: “Additional specifications for dynamic distributed filters for xDSL over POTS“. NOTE 1: Before the publication of the 3 or 4 parts as describe
35、d above, the TS 101 952 was composed of 2 parts, which discriminated between ADSL and VDSL, with several subparts. For reasons of simplicity the TS is now restructured as a set of only 3 (potentially 4) documents, intended for both ADSL and VDSL when applicable. The older structure of the documents
36、is explained in the informative annex B. NOTE 2: Useful information on splitter tests may be found in TR 101 953-1-1 i.3, TR 101 953-1-2 i.4, TR 101 953-2-1 i.5 and TR 101 953-2-2 i.6. These documents are linked to the previous versions of the splitter specifications. i.3, i.4, i.5 and i.6 e.g. desc
37、ribe the combination of the AC testing conditions of the test set-ups with the DC conditions controlled via feeding and loading bridges. If there is a discrepancy between the present document and the older TR 101 953 series of documents, the present document prevails. NOTE 3: The use of distributed
38、filters is not recommended for VDSL but it is not excluded. For this reason parts 3 and 4 refer to distributed filters for xDSL and not just for ADSL. The present document is fully in line with initiative “eEurope 2002 - An Information Society For All“, under “The contribution of European standardiz
39、ation 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 V1.1.1 (2009-06)7Introduction Remarks on and limitations of the present document The present document covers all xDSL system variants, such as A
40、DSL, ADSL2, ADSL2plus, VDSL1 and VDSL2. It is applicable at the Local Exchange (LE) (i.e. network) side of the line at the LE or at the cabinet and at the Terminal Equipment (TE) (i.e. user) side of the line. A number of limitations and remarks should be listed: 1) The use of the present documents i
41、s extended to splitters at the cabinet. Indeed, the previous versions of the present document clearly stated that they did not apply to splitters at the cabinet. However as explained in the informative annex C, this restriction was lifted. 2) The present document does not contain the requirements fo
42、r splitters, which can handle both POTS and ISDN. These so-called xDSL over “ISDN or POTS“ universal splitters are specified in part 2. 3) Splitters at the customer premises with a distributed topology, called distributed filters, are not within the scope of the present document. They are described
43、in part 3 (and potentially part 4). 4) The present document covering xDSL over POTS splitters was gained from the experience with passive and static xDSL splitters, the original state of the art for this application. Furthermore, the experience was gained with identical requirements at either side o
44、f 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 the TE side of the line. However, in the note under table A.3 an optional diversification between splitters requirements at the two s
45、ides of the line is described. For the TE side splitters an optional variant could be allowed with better downstream protection, with less IL in the upstream band and more IL in the downstream band. Similar differentiation between LE and TE is possible for the balance requirements, see the note unde
46、r table A.10. 5) The present document covering xDSL over POTS splitters is limited to passive and static splitters. There are other classes of filters possible, besides passive and static splitters. Such active and/or dynamic filters are composed of other elements than passive components. Active/dyn
47、amic splitters require different and additional requirements and test methods to be specified. The full specification of requirements for active/dynamic splitter is F.F.S. An introduction to this is in the informative annex K. 6) For certain static properties in the present document it is possible t
48、o relax the requirements and prove in dynamic tests that the splitter performs sufficiently well. These dynamic tests are compiled in WT-127, by the Broadband Forum. The use of the WT-127 methodology for this purpose is outside the scope of this version of the document, but could prove useful to int
49、roduce splitters with reduced complexity, or active and/or dynamic splitters. The WT-127 methodology is not fully finalized. It is described in annex H. Finalizing splitter tests in the present document based on WT-127 is F.F.S. 7) To test distortion, noise and other requirements in the present document the WT-127 methodology is sometime a superior methodology, or even the only feasible method at an acceptable complexity. Indeed, WT-127 will prove that a splitter works correctly in a worst case xDSL test environment. With such tests, based on actual xDSL transc
