1、ETSI TR 101 953-1-1 1.1.1 (2002-11) Technical Repor 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 ADSL/POTS splitters 2 ETSI TR 10
2、1 953-1-1 VI .I .I (2002-1 1) Reference DTR/AT-O1 O091 -01 -01 Keywords ADSL, POTS, splitter, testing ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la S
3、ous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:lwmv.etsi .arq 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 betwe
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6、 as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2002. All rights reserved. DECTTM, PLUGTESTSTMand UMTSTMare Trade Marks of ETSI registered for the benefit of its Members. TIPHONTM
7、 and 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 Organizational Partners. ETSI 3 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) Contents Intellectual Property Righ
8、ts . .4 Foreword . 4 1 2 3 3.1 3.2 4 5 6 6.1 6.2 6.3 6.4 6.5 6.6 Scope 5 References . .5 Definitions and abbreviations. . .6 . 6 . 6 Definitions . Abbreviations Introduction . .6 Test conditions and general notes . .7 List of test cases for the low pass part of the ADSL over POTS splitter . 9 9 Inse
9、rtion Loss in the Pass Band (POTS) . . 6.6.1 6.6.2 6.7 6.7.1 6.7.2 6.7.3 6.8 6.8.1 6.8.2 6.9 6.10 6.11 6.11.1 6.11.2 6.12 History Insertion Loss Distort . Return loss in the pass band (POTS) . Group delay distortion in the pass band (P Isolation (Insertion Loss) . . . Distortion and intermodulation
10、. . Distortion . Intermodulation . . DC requirements . DC resistance to e . DC Resistance betwee s) DC series resistance. . Ringing fiequency require Voltage drop at 25 Hz Total harmonic distortion at 25 Hz and 50 Hz . Ringing Impedance. . Unbalance about earth . Noise . Noise in the band fiom 300 H
11、z to 4 O00 Hz (POTS band) Noise in the band fiom 26 kHz to 1 100 kHz (ADSL band) Metering at 12 IcHz or 16 kHz . .42 ETSI 4 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The informa
12、tion pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR O00 3 14: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETS
13、I Secretariat. Latest updates are available on the ETSI Web server (5). 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 O00 3 14 (or the updates on the ETSI
14、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 Terminals (AT), and TM6 of Technical Committee Transmission a
15、nd Multiplexing (TM). The present document is part 1, sub-part 1 of a multi-part deliverable covering Unified and Generic Testing Methods for European Specific DSL splitters, as identified below: Part 1: “ADSL splitters for European deployment“; Sub-part 1: Sub-part 2: Sub-part 3: “Specification of
16、Testing methods for Low Pass part of ADSL/POTS splitters“; “Specification of Testing methods for High Pass part of ADSL/POTS splitters“; “Specification of Testing methods for ADSL/ISDN splitters“; Part 2: NOTE: “VDSL splitters for European deployment“. The choice of a multi-part format for the prese
17、nt document is to facilitate maintenance and future enhancements. ETSI 5 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) 1 Scope The present document describes test methods for the low pass section of POTS/ADSL splitters. These splitters are intended to be installed at the Local Exchange side of the local l
18、oop 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 by the present document. 2 Re fe re
19、nces For the purposes of this Technical Report (TR) the following references apply: il ETSI ETR 328: “Transmission and Multiplexing (TM); Asymmetric Digital Subscriber Line (ADSL); Requirements and performance“. ETSI TS 101 388: “Transmission and Multiplexing (TM); Access transmission systems on met
20、allic access cables; Asymmetric Digital Subscriber Line (ADSL) - European specific requirements ITU-T Recommendation G.992.1 modified“. ETSI EG 201 120: “Public Switched Telephone Network (PSTN); Method of rating terminal equipment so that it can be connected in series andor in parallel to a Network
21、 Termination Point (NTP)“. ETSI TR 102 139: “Compatibility of POTS terminal equipment with xDSL systems“. ITU-T Recommendation G.992.2: “Splitterless asymmetric digital subscriber line (ADSL) transceivers“. 21 31 41 51 61 71 ITU-T Recommendation G.992.1: “Asymmetric Digital Subscriber Line (ADSL) tr
22、ansceivers“. ETSI TBR 38: “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 analogue interface of the PSTN in Europe“. SI ETSI TBR 2 1 : “Termin
23、al Equipment (TE); Attachment requirements 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) signall
24、ing“. ETSI TR 101 728: “Access and Terminals (AT); Study for the specification of low pass filter section of POTS/ADSL splitters“. ETSI TS 101 952-1-1: “Access network xDSL transmission filters; Part 1: ADSL splitters for European deployment; Sub-part 1 : Specification of the low pass part of ADSL/P
25、OTS splitters“. ITU-T Recommendation 0.42: “Equipment to measure non-linear distortion using the 4-tone intermodulation method“. ETSI 6 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) 3 3.1 Definitions and abbreviations De fi nit ions For the purposes of the present document, the following terms and definit
26、ions apply: A-wire and B-wire: wires in 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 a
27、t the customer end of the loop, then only when all of these are on-hook should the CPE be considered to be on hook from the perspective of testing the splitter. off-hook ostate of the POTS equipment at either end of a loop connection when the NTP terminal equipment is in the steady loop state 3.2 Ab
28、breviations For the purposes of the present document, the following abbreviations apply: ADSL CPE dBm dBV DC ITU LE NF NTP OP POTS TE Asymmetric Digital Subscriber Line Customer Premise Equipment Absolute power level expressed in decibels relative to 1 mW Absolute voltage level expressed in decibels
29、 relative to 1 Volt Direct Current International Telecommunication Union Local Exchange (Central Office) Narrow-b and Frequency Network Termination Point Operational Amplifier Plain Old Telephone Service Terminal Equipment (e.g. Telephone, Fax, voice band modem etc.) 4 I n t rod uct ion The present
30、document is part 1 of a multi-part deliverable supporting different aspects of European Specific DSL splitters. It has been produced based on the activities of ETSI STF 215. The present document describes test methods for the low pass part of ADSL/POTS splitters. The test methods of the present docu
31、ment are based on requirements of different documents describing ADSL/POTS splitters: - TS 101 952-1-1 lo (ES 201 952-1-1); - TR 101 728 9; - TS 101 388; - ITU-T Recommendation G.992.1 6, annex E (El. Type 1 - European). The requirements from TR 101 728 9 and TS 101 952-1-1 lo are assessed to be the
32、 “essential“ or minimum tests. The additional tests that are required in ITU-T Recommendation G.992.1 6 have been assessed as “optional“ tests. There are two columns in each test matrix which inform about the “essential“ and the “optional“ tests. ETSI 7 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) For ea
33、ch test, the present document describes: - Title of the test; - Purpose of the test; - - Test configuration; - Test set up; - Test parameters; - Test results matrix; and - Measuring notes. Requirement and reference to the specifications; 5 Test conditions and general notes For each test, feeding bri
34、dge and holding circuit must comply to the requirements as specified in TBR 38 7 with respect to the low frequency range. Similar performance is required for the high frequency range (up to 1 MHz). An equivalent accuracy may be obtained by calibrating the feeding bridge and holding circuit across th
35、e relevant frequency range. a Test connection Feeding Bridge - b Signal injection b DC feeding Figure 1: External circuitry for feeding bridge a - Circuit b - b RDC Figure 2: External circuitry for holding circuit ETSI 8 ring ETSI TR 101 953-1-1 VI .I .I (2002-1 1) Power Source General notes: Polari
36、ty of the feeding current may impact the additional insertion loss caused by feeding bridge and holding circuit. A calibrationhormalization 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 f
37、eeding bridge should be connected to the POTS port and the holding circuit 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. The inaccuracy of the measurement which results from
38、 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 related standard this tolerance in the test results need to be taken into account. Before splitters are tested the class of spl
39、itter should be categorized. Basis for this could be the schematic of the splitter or a statement of the manufacturer. 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 det
40、ection: splitters which perform NF filtering using passive components, which are enhanced by detection circuits based on the DC voltage andor the DC current. active: splitters which contain active components (like OP amplifier) to perform the NF filtering. NOTE: The splitters which have been evaluat
41、ed during the validation of the test methods described herein are to be classified in clusters “passive“ or “passive with current/voltage detection“. No “active“ splitters could be made available for evaluation. The results of the STF 215 work could be validated for the first two classes, for the th
42、ird 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 separa
43、tion of this two different types: i : Figure 3: Example for a splitter not breaking the DC path - Figure 4: Example for a splitter breaking the DC path Filters with current/voltage detection must be classified under the first type of splitters for their operating range (e.g. DC current above detecti
44、on limit) and under the second type of splitters in the blocking range (e.g. DC current below detection limit). ETSI 9 ETSI TR 101 953-1-1 VI .I .I (2002-1 1) Test case name: Refe re n ce : Test purpose: Test configuration: 6 List of test cases for the low pass part of the ADSL over POTS splitter In
45、sertion Loss in the Pass Band (POTS) and Insertion Loss Distortion in the Pass Band (POTS) TS 101 952-1-1 IO, clauses 6.4.1, 6.4.2 and 6.5 To evaluate the Insertion Loss in the Pass Band (POTS) as well as the Insertion Loss Distortion in the Pass Band (POTS) in Off-Hook and in On-Hook state when tes
46、ted with the test parameters as given in the related standards See Test Set-up; DUT not configured 6.1) 6.2) 6.3) 6.4) 6.5) 6.6) Distortion and Intermodulation Insertion loss in the pass band (POTS) Insertion loss distortion in the pass band (POTS) Return loss in the pass band (POTS) Group delay dis
47、tortion in the pass band (POTS) Isolation (insertion loss) at 32 kHz to 1 100 kHz 6.6.1) Distortion (distortion and intermodulation) 6.6.2) Intermodulation (distortion and intermodulation) 6.7) DC Requirements 6.7.1) DC resistance to earth 6.7.2) 6.7.3) DC series resistance 6.8) Ringing Voltage Requ
48、irements DC resistance between a-wire and b-wire (open ports) 6.8.1) 6.8.2) Voltage drop at 25 Hz and 50 Hz (ringing frequency requirements) Total harmonic distortion at 25 Hz and 50 Hz (ringing frequency requirements) 6.9) Impedance at 25 Hz and 50 Hz (ringing frequency requirements) 6.10) Unbalanc
49、e about earth for the low pass filter 6.1 1) Noise Requirements 6.1 1.1) Noise in the band from 300 Hz to 4 O00 Hz (POTS band) 6.1 1.2) Noise in the band from 26 kHz to 1 100 kHz (ADSL band) 6.12) Metering at 12 kHz or 16 kHz 6.1 Insertion Loss in the Pass Band (POTS) Void. 6.2 Insertion Loss Distortion in the Pass Band (POTS) Table 1 ETSI 10 a Feeding Bridge b b ETSI TR 101 953-1-1 VI .I .I (2002-1 1) Signal Holding Circuit Test Set-up: Parameter Level of the test signal Us Frequency of the test signal Us :ombination of Source and Load Impedances Value -4
