1、 ETSI TR 101 953-2-1 V1.1.1 (2003-12)Technical Report Access network xDSL transmission filters;Part 2: VDSL splitters for European deployment;Sub-part 1: Specification of Testing methodsfor low pass part of VDSL/POTS splittersETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 2 Reference DTR/AT-010091-02-01
2、Keywords ADSL, POTS, splitter, testing, VDSL 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-Prfecture de Grasse (06) N 7803/88 Important notice In
3、dividual 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 versions, the reference version is the Portable Docu
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5、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, send your comment to: editoretsi.org Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and t
6、he foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2003. All rights reserved. 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 regis
7、tered 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 Organizational Partners. ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References 5 3 Definitions and abb
8、reviations.5 3.1 Definitions5 3.2 Abbreviations .6 4 Introduction 6 5 Test conditions and general notes 7 6 List of test cases for the low pass part of the VDSL over POTS splitter .9 6.1 Tests for DC requirements9 6.1.1 Tests for DC resistance to earth9 6.1.2 Tests for DC insulation resistance betwe
9、en A-wire and B-wire .11 6.1.3 Tests for DC series resistance.12 6.2 Tests for ringing frequency requirements.14 6.2.1 Tests for voltage drop at 25 Hz and 50 Hz .14 6.2.2 Tests for impedance at 25 Hz and 50 Hz 16 6.2.3 Tests for total harmonic distortion at 25 Hz and 50 Hz 17 6.3 Tests for pass band
10、 loss requirements (on-hook) .19 6.3.1 Tests for on-hook requirement for the case of high impedance injection .19 6.3.2 Tests for on-hook requirement for the case of low impedance injection 21 6.4 Tests for pass band loss requirements (off-hook).24 6.4.1 Tests for off-hook pass band insertion loss.2
11、4 6.4.2 Tests for off-hook pass band insertion loss distortion 24 6.5 Tests for return loss requirements 26 6.5.1 Tests for return loss requirements options A and B26 6.6 Tests for requirements relating to metering pulses.28 6.6.1 Tests for requirements relating to metering pulses at 12 kHz or 16 kH
12、z28 6.7 Tests for unbalance about earth30 6.7.1 Tests for the unbalance about earth (LCL/LCTL) without feeding 31 6.7.2 Tests for the unbalance about earth with DC feeding on basis of the branch impedances32 6.8 Tests for VDSL band requirements35 6.8.1 Tests for On-hook loss for VDSL over POTS split
13、ters.35 6.8.2 Tests for Off-hook isolation37 6.9 Tests for noise 40 6.9.1 Tests for audible noise level .40 6.9.2 Tests for VDSL band noise level 42 6.10 Tests for distortion46 6.10.1 Tests for POTS band intermodulation distortion 46 6.11 Tests for signal delay Impacts 47 6.11.1 Tests for group dela
14、y distortion 47 6.12 Tests for requirements related to POTS effects49 6.12.1 Tests for requirements related to POTS transient effects49 History 51 ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 4 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been de
15、clared 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); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, whi
16、ch 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, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs no
17、t 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 Report (TR) has been produced by ETSI Technical Committee Access and Terminals (AT). AT Analogue of Technical Committee Access and T
18、erminals (AT); and TM6 of Technical Committee Transmission and Multiplexing (TM). The present document is part 2, sub-part 1 of a multi-part deliverable supporting different aspects of European Specific DSL splitters, as identified below: Part 1: “ADSL splitters for European deployment“; Part 2: “VD
19、SL splitters for European deployment“; Sub-part 1: “Specification of Testing methods for low pass part of VDSL/POTS splitters“; Sub-part 2: “Specification of Testing methods for high pass part of VDSL/POTS splitters“; Sub-part 3: “Specification of Testing methods for VDSL/ISDN splitters“. NOTE: The
20、choice of a multi-part format for this deliverable is to facilitate maintenance and future enhancements. ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 5 1 Scope The present document describes test methods for the low pass section of VDSL/POTS splitters. These splitters are intended to be installed at th
21、e Local Exchange side of the local loop and at the user side near the NTP. In the case of splitters at the user side, the present document describes test methods for the master splitter that is intended for use at the demarcation point of the customer premises. Distributed filters are not concerned
22、by the present document. 2 References For the purposes of this Technical Report (TR) the following references apply: 1 ETSI TS 101 270 (all parts): “Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL)“. 2 ETSI TS 1
23、01 952-2-1: “Access network xDSL transmission filters; Part 2: VDSL splitters for European deployment; Sub-part 1: Specification of the low pass part of VDSL/POTS splitters“. 3 ETSI TS 101 952-1-1: “Access network xDSL transmission filters; Part 1: ADSL splitters for European deployment; Sub-part 1:
24、 Specification of the low pass part of ADSL/POTS splitters“. 4 ETSI TR 101 953-1-1: “Access and Terminals (AT); Unified and Generic Testing Methods for European Specific DSL splitters; Part 1: ADSL splitters for European deployment; Sub-part 1: Specification of Testing methods for Low Pass part of A
25、DSL/POTS splitters“. 5 ETSI TR 102 139: “Compatibility of POTS terminal equipment with xDSL systems“. 6 ETSI TR 101 728: “Access and Terminals (AT); Study for the specification of low pass filter section of POTS/ADSL splitters“. 7 ITU-T Recommendation O.9: “Measuring arrangements to assess the degre
26、e of unbalance about earth“. 8 ITU-T Recommendation O.42: “Equipment to measure non-linear distortion using the 4-tone intermodulation method“. 9 ETSI TBR 038: “Public Switched Telephone Network (PSTN); Attachment requirements for a terminal equipment incorporating an analogue handset function capab
27、le of supporting the justified case service when connected to the analogue interface of the PSTN in Europe“. 10 ETSI TBR 021: “Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE (excluding TE supp
28、orting the voice telephony service) in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signalling“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: A-wire and B-wire: wires in
29、the 2-wire local loop connection provided from the exchange to the NTP on-hook: state of the POTS equipment at either end of a POTS loop connection when the NTP terminal equipment is in the quiescent state NOTE: In the case where there are multiple TE present at the customer end of the loop, then on
30、ly when all of these are on-hook should the CPE be considered to be on hook from the perspective of testing the splitter. ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 6 off-hook: state of the POTS equipment at either end of a loop connection when the NTP terminal equipment is in the steady loop state 3
31、.2 Abbreviations For the purposes of the present document, the following abbreviations apply: ADSL Asymmetric Digital Subscriber Line CO Central Office (Local Exchange) CPE Customer Premises Equipment dBm absolute power level expressed in decibels relative to 1 mW dBmp absolute power level weighted
32、psophometrically dBV absolute voltage level expressed in decibels relative to 1 Volt dBVp absolute voltage level weighted psophometrically DSLAM Digital Subscriber Line Access Multiplexer DUT Device Under Test HPF High Pass Filter ISDN-BA Integrated Services Digital Network-Basic Access ITU Internat
33、ional Telecommunication Union LCL Longitudinal Conversion Loss LCTL Longitudinal Conversion Transfer Loss LE Local Exchange (Central Office) LPF Low Pass Filter LT Line Termination NF Narrow-band Frequency NT Network Termination NTP Network Termination Point POTS Plain Old Telephone Service rms root
34、 mean square TE Terminal Equipment (e.g. telephone, fax, voice band modem, etc.) THD Total Harmonic Distortion VDSL Very high speed Digital Subscriber Line 4 Introduction The present document is part 2 of a multi-part deliverable supporting different aspects of European Specific DSL splitters. It ha
35、s been produced based on the activities of ETSI STF 248. The current document describes test methods for the low pass part of VDSL/POTS splitters. The test methods of this Technical Report are based on requirements of the following document: TS 101 952-2-1 2. Furthermore certain aspects of the follo
36、wing documents have been considered as to provide a document which is consistent with the specifications of the other sub parts of TR 101 953: TS 101 952-1-1 3; TR 101 953-1-1 4. For each test, the document describes: Title of the test; Requirement in reference to the specifications; Purpose of the
37、test; ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 7 Test configuration; Test set up; Test parameters; Test matrix; Test procedure note; Test Result; Measuring notes. 5 Test conditions and general notes For each test, feeding bridge and holding circuit must comply to the requirements as specified in TB
38、R 038 9 with respect to the low frequency range. Similar performance is required for the high frequency range (up to 12 MHz). An equivalent accuracy may be obtained by calibrating the feeding bridge and holding circuit across the relevant frequency range. UFRFIFFeeding Bridge A DC feeding Signal inj
39、ection a a b b Test connection Figure 1: External circuitry for feeding bridge RDCa b Holding Circuit DC a b Figure 2: External circuitry for holding circuit General notes: Polarity of the feeding voltage and with this the direction of the feeding current may impact the additional insertion loss cau
40、sed by feeding bridge and holding circuit. A calibration/normalization measurement need to be taken before each single measurement step. For active splitters the connection of the DC feeding is essential i.e. for LE splitters the feeding bridge should be connected to the POTS port and the holding ci
41、rcuit should be connected to the LINE port. For TE splitters the feeding bridge should be connected to the LINE port and the holding circuit should be connected to the POTS port. ETSI ETSI TR 101 953-2-1 V1.1.1 (2003-12) 8 Test set-ups as given in the present document show TE test set-ups unless sta
42、ted otherwise. Tests for LE splitter evaluation should be set up considering the aforementioned. Accordingly, ringing and metering signals shall be provided to the relevant port of the tested splitter (LE splitter: signal source connected to POTS port and load connected to LINE port; TE splitter: si
43、gnal source connected to LINE port and load connected to POTS port). The inaccuracy of the measurement which results from tolerances in the test set-up and its containing equipment should be carefully considered. When giving a verdict on the test results with respect to the requirement in the relate
44、d standard this tolerance in the test results need to be taken into account. ZVDSLas given in the current version of TS 101 952-2-1 2 is likely to be changed in co-operation between ETSI AT and ETSI TM6. The termination as referenced to in the present document reflect the current specification, howe
45、ver, when performing tests ZVDSL-1and ZVDSL-2and all related parameters shall be checked carefully with the then-current TS 101 952-2-1 2. Before splitters are tested the class of splitter should be categorized. Basis for this could be the schematic of the splitter or a statement of the manufacturer
46、. The following classes have been identified so far in the course of this project: passive: splitters which do exclusively contain passive components. passive with current/voltage detection: splitters which perform NF filtering using passive components, which are enhanced by detection circuits based
47、 on the DC voltage and/or the DC current. active: splitters which contain active components (like OP amplifier) to perform the NF filtering. NOTE: The splitters which have been evaluated during the validation of the test methods described herein are to be classified in cluster “passive“. Although th
48、e STF 248 has not had a splitter classified in cluster “passive with current/voltage detection“ at hand for the validation, the experience from STF 215 allowed to assess the test methods for that type, too. No “active“ splitters could be made available for evaluation. The results of the STF 248 work
49、 could be validated for the first two classes, for the third class (active splitters) theoretical test case validations have been discussed. At some test cases in the present document, a difference is made between splitters which do not break the DC path and splitters which do break the DC path. The following drawings should give a guidance for the separation of this two different types. Power sink active filte-ring NF de- coupling NF coupling Figure 3: Example for a splitter not breaking the DC path ETSI ETSI T
