1、ETSI TS 1 O1 135 1.5.3 (2000-09) Technical Specification T ra nsm iss on and M u It i pl ex n g (TM); High bit-rate Digital Subscriber Line (HDSL) transmission systems on metallic local lines; HDSL core specification and applications for combined ISDN-BA and 2 048 kbit/s transmission 2 ETSI TS 1 O1
2、135 V1.5.3 (2000-09) The pre Reference RTS/TM-06019 Keywords access, basic, digital, HDSL, ISDN, local loop, rate, subscriber, transmission 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 0001 7 - NAF 742 C Assoc
3、iation but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present document can be downloaded from: http:llwww.etsi.org ent document may be made available in more than one electronic version or in print. In e of existing or perceived diff
4、erence 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 should be aware t
5、hat 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:llwww.etsi.orcg/lb/status/ If you find errors in the present document, send your comment to: editor et.si.fr Copyright Notification No part may be
6、reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunications Standards Institute 2000. All rights reserved. ETSI 3 ETSI TS 1 O1 135 V1.5.3 (2000-09) Contents Intellectual Property Rights 11 Forew
7、ord . 11 1 Scope 12 2 References 13 Reference configuration and functional descnption . 16 HDSL core specification 18 3 Abbreviations . 15 4 5 5.1 5.1.1 5.1.2 5.1.3 5.1.4 5.1.5 5.1.6 5.1.7 5.1.8 5.1.9 5.1.10 5.1.11 5.1.12 5.1.13 5.1.14 5.1.15 5.1.16 5.1.17 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.2.4.1 5.2.4.2
8、 5.2.4.3 5.2.4.4 5.2.4.5 5.2.4.6 5.3 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.3.7 5.4 5.4.1 5.4.2 5.4.2.1 Functions 18 Transparent transport of core frames 19 Stuffing and destuffing . 19 CRC-6 procedures and transmission error detection 19 Error reporting 19 Failure detection . 19 Failure reporting .
9、19 Bit timing 19 Frame alignment . 19 Loopback control and Co-ordination . 19 Control of the maintenance channel 20 Synchronization and Co-ordination of HDSL transceivers . 20 Identification of pairs 20 Remote power feeding 20 Wetting current . 20 Description 20 Minimum Digital Local Line (DLL) requ
10、irements for HDSL applications 20 DLL physical characteristics . 21 DLL electrical characteristics . 21 Principal characteristics 21 Differences in physical transmission characteristics between pairs in the DLL . 22 Crosstalk characteristics 22 Impulse noise 22 Micro-interruptions . 22 General 23 Tr
11、ansmission on three pairs 23 Transmission on two pairs 23 Transmission on four pairs . 23 Line code 23 Line baud rate . 24 Frame structure . 24 Core frame 24 2B1Q HDSL frame . 24 2B 10 HDSL frame structure . 29 HDSL transceiver autonomous start-up control 19 Mapping between core frames and HDSL fram
12、es 19 Correction of pair identification 20 Transmission medium 20 Unbalance about earth . 22 Transmission method . 23 Transmission on one pair 23 . 5.4.2.1.1 5.4.2.1.2 5.4.2.1.3 5.4.2.2 Frame structure of the three pair system 29 Frame structure of the two pair system 30 Frame structure of the one p
13、air system 32 Frame bit assignments . 33 5.4.3 Scrambling method . 36 ETSI 4 ETSI TS 1 O1 135 V1.5.3 (2000-09) 5.5 5.5.1 5.5.2 5.5.2.1 5.5.2.2 5.5.3 5.5.3.1 5.5.3.2 5.5.3.3 5.5 3.4 5.5.4 5.5.5 5.5.6 5.5.7 5.5.7.1 5.5.7.2 5.6 5.6.1 5.6.1.1 5.6.1.2 5.6.1.3 5.6.1.4 5.6.2 5.6.2.1 5.6.2.1.1 5.6.2.1.2 5.6
14、.2.2 5.6.2.2.1 5.6.2.2.2 5.6.2.2.3 5.6.2.2.4 5.6.2.2.5 5.6.2.2.6 5.6.3 5.6.3.1 5.6.3.2 5.6.3.3 5.6.3.4 5.6.4 5.6.4.1 5.6.4.2 5.6.4.3 5.6.4.4 5.6.4.5 5.6.4.6 5.6.5 5.6.5.1 5.6.5.2 5.6.5.3 5.6.6 5.6.6.1 5.6.6.1.1 5.6.6.1.2 5.7 5.7.1 5.7.2 5.7.3 5.7.4 5.7.5 5.7.5.1 5.7.5.2 HDSL embedded operations chan
15、nel (eoc) 38 Functions of the HDSL eoc 38 HDSL eoc acknowledgement protocol . 39 Message/echo response protocol state . 40 Unable To Comply (UTC) mode of operation 40 The HDSL eoc data read/write mode 41 Data read protocol . 41 HDSL eoc data read mode requirements . 42 Data write protocol 43 HDSL eo
16、c data write mode requirements . 43 HDSL eoc message list . 44 HDSL eoc message set requirements 44 Noise margin . 48 General 48 Start-up procedure 48 General 48 Activation of HDSL transceiver pairs . 49 Data registers in the NTU and in regenerators 47 Coding of the noise margin values 48 Start-up 4
17、8 Transparency . 49 Noise margin . 49 Control signals 49 QUIET . 49 ACTREQ . 49 Status signals . 49 LOSW 49 LOSWT . 49 LOS SO LOST . 50 INDC . 50 INDR . 50 Transmitted signals . 50 Silent . 50 SO signal 50 S1 signal 50 2B iQ data . 51 Timers . 51 T1 51 T2 51 T3 51 T4 51 T-Act . 51 Timer values 51 Co
18、ntrol and status signals . 49 Activation state diagrams 52 HDSL transceiver states at the NTU . 52 HDSL transceiver states at the LTU . 55 The HDSL synchronization state machine 57 Regenerator related procedures . 57 Activation state diagrams for the REG 58 HDSL transceiver states at the REG-R 58 HD
19、SL transceiver states at the REG-C 58 Operation and Maintenance (O Essential, or potentially Essential, IPRs notifed to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (-). Pursuant to the ETSI IPR Policy, no inves
20、tigation, 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 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 Specif
21、ication (TS) has been produced by ETSI Technical Committee Transmission and Multiplexing (TM). The previous three versions have been published by ETSI as ETR 152 Editions 1, 2 and 3, while version 4 was published as TS 101 135 V1.4.1. This version provides a correction to an editorial error in figur
22、es 32 and B.27. ETSI 12 ETSI TS 1 O1 135 V1.5.3 (2000-09) 1 Scope The present document describes a transmission technique called High bit-rate Digital Subscriber Line (HDSL), as a means for the transportation of several types of applications. The present document defines the requirements for the ind
23、ividual HDSL transmission system, the transmission performance, the HDSL maintenance requirements and procedures and the mapping of information from the dedicated applications. An individual HDSL transceiver system is a two wire bidirectional transceiver for metallic wires using the echo cancellatio
24、n method. Three systems may be utilized, one transporting a bit rate of 784 kbitls over each of three pairs used in parallel, a second with an increased bit rate of 1 168 kbitls and two pairs in parallel only and a third with a more increased bit rate of 2 320 kbitls on one pair only. The line codes
25、 of systems specified in the present document are 2B1Q (2 Binary 1 Quaternary) and CAP (Carrierless Amplitude Phase modulation). Systems using a CAP line code are covered in annex B. Annex C summarizes the Committee T1 recommendation for the frame structure of 1 544 kbitls applications. Only one of
26、the line codes has to be realized in a transmission system. The present document defines the common circuitry for combining and controlling one, two or three HDSL transceiver systems, depending on the bit rate of the transceiver system used, for the support of applications with a 2 048 kbitls hierar
27、chy. The common circuitry and the necessary number of HDSL transceiver systems form the HDSL core, which is independent from the different applications defined in the present document. The applications of HDSL are determined by the functionality of the mapping and interface part, some of which are d
28、efined as follows: - - - ISDN primary rate access digital section in accordance with ETS 300 233 i; ONP leased line access D2048U based on ETS 300 246 2 and ETS 300 247 3; ONP leased line access D2048S based on ETS 300 418 4 and ETS 300 419 5; - 2 Mbitls access to the Synchronous Digital Hierarchy (
29、SDH) via a TU-12. The HDSL core may be used for applications that are not restrictive to the access portion of the network but this is outside the scope of the present document. NOTE: If further applications are identified in future the present document may be enhanced to define the relevant interfa
30、ce and mapping requirements as far as these do not violate the specification of the HDSL core. Special applications of the HDSL core or part of the HDSL core can be: - fractional installation, which provides reduced access capability only by a reduced number of HDSL transceivers, to cater for an ine
31、xpensive system if the total capacity of 30 x 64 kbitls is not needed; partial operation, which is the persistent operation of the operable HDSL transceiver systems when others become inoperable; - - fractional payload, e.g. Ho-channel. The bit-rate at the application interface will also be 2 048 kb
32、itls in these applications, but not all the time slots in the ITU-T Recommendation G.704 32 frame may be used, or there may be network specific interfaces used for these applications, the definition of which is outside the scope of the present document. The present document does not specify all the
33、requirements for the implementation of NTU, LTU or REG. It serves only to describe the functionality needed. ETSI 13 ETSI TS 1 O1 135 V1.5.3 (2000-09) 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. Referen
34、ces are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. A non-specific reference to an ETS shall also be taken to refer to
35、 later versions published as an EN with the same number. il ETS 300 233: “Integrated Services Digital Network (ISDN); Access digital section for ISDN primary rate“. ETS 300 246 (1993): “Business Telecommunications (BT); Open Network Provision (ONP) technical requirements; 2 048 kbitls digital unstru
36、ctured leased line (D2048U) Network interface presentation“. Pl 31 ETS 300 247 (1993): “Business Telecommunications (BT); Open Network Provision (ONP) technical requirements; 2 048 kbitls digital unstructured leased line (D2048U) Connection characteristics“. 41 ETS 300 418 (1995): “Business Telecomm
37、unications (BTC); 2 048 kbitls digital unstructured and structured leased lines (D2048U and D2048S); Network interface presentation“. ETS 300 419 (1995): “Business Telecommunications (BTC); 2 048 kbitls digital structured leased lines (D2048S); Connection characteristics“. Pl 61 ETR O80 (1993): “Tra
38、nsmission and Multiplexing (TM); Integrated Services Digital Network (ISDN) basic rate access; Digital transmission system on metallic local lines“. ETS 300 O1 1 (1992): “Integrated Services Digital Network (ISDN); Primary rate user-network interface; Layer 1 specification and test principles“. VI S
39、I CCITT Fascicle 1.3: “Definitions“ PI ITU-T Recommendation G.823 (1993): “The control of jitter and wander within digital networks which are based on the 2 048 kbitls hierarchy“. ITU-T Recommendation G.826 (1993): “Error performance parameters and objectives for international, constant bit rate dig
40、ital paths at or above the primary rate“. ETS 300 O 19 (1992): “Equipment Engineering (EE); Environmental conditions and environmental tests for telecommunications equipment“. 101 i 11 I21 ITU-T Recommendation O. 15 1 (1992): “Error performance measuring equipment operating at the primary rate and a
41、bove“. EN 60950 (1992): “Safety of information technology equipment“. CCITT Recommendation K.17 (1988): “Tests on power-fed repeaters using solid-state devices in order to check the arrangement for protection from external interference“. U31 u41 U51 ITU-T Recommendation K.20 (1996): “Resistibility o
42、f telecommunication switching equipment to overvoltages and overcurrents“. ITU-T Recommendation K.21 (1996): “Resistibility of subscribers terminal to overvoltages and overcurrents“. U61 ETSI 14 ETSI TS 1 O1 135 V1.5.3 (2000-09) ETS 300 386-2: “Electromagnetic compatibility and Radio spectrum Matter
43、s (ERM); Telecommunication network equipment; ElectroMagnetic Compatibility (EMC) requirements; Part 2: Product family standard“. ETS 300 386- 1: “Equipment Engineering (EE); Telecommunication network equipment; Electro- Magnetic Compatibility (EMC) requirements; Part 1: Product family overview, com
44、pliance criteria and test levels“. ETS 300 166 (1993): “Transmission and Multiplexing (TM); Physical and electrical characteristics of hierarchical digital interfaces for equipment using the 2 048 kbitls - based plesiochronous or synchronous digital hierarchies“. ETS 300 167 (1993): “Transmission an
45、d Multiplexing (TM); Functional characteristics of 2 048 kbitls interfaces“. IS0 21 10 (1991): “Information Technology - Data communication - 25-pole DTE/DCE interface connector and connect number assignments“. ITU-T Recommendation G.707 (1995): “Network node interface for the synchronous digital hi
46、erarchy (SDH)“. IEEE Transactions on Information Theory, Volume IT-33 (July 1984): “Rotationally Invariant Convolutional Coding with Expanded Signal Space - Part II: Nonlinear Codes“ (Lee-Fang Wei). IEEE Journal on Selected Areas in Communication, Volume 9, No. 6 (August 1991): “Combined Trellis Cod
47、ing and DFE Through Tomlinson Precoding“ (R. L. Cupo et al). ANSI Committee T1 Technical Report No. 28 (February 1994): “A Technical Report on High Bit- Rate Digital Subscriber Lines (HDSL)“. IEEE Transactions on Circuits and Systems Volume CAS-33 No. 10 (October 1986): “Multitone Signals with Low C
48、rest Factor“ (Stephen Boyd). ETS 300 012: “Integrated Services Digital Network OSDN); Basic user-network interface; Layer 1 specification and test principles“. ETS 300 297: “Integrated Services Digital Network (ISDN); Access digital section for ISDN basic access“. ITU-T Recommendation Q.552: “Transm
49、ission characteristics at 2-wire analogue interfaces of digital exchanges“. CCITT Recommendation G.711 (1988): “Pulse code modulation (PCM) of voice frequencies“. ITU-T Recommendation G.821: “Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an integrated services digital network“. ITU-T Recommendation G.704 (1998): “Synchronous frame structures used at 1 544,6 312, 2 048, 8 488 and 44 736 kbitls hierarchical levels“. ETSI 15 ETSI TS 1 O1 135 V1.5.3 (2000-09) 3 Abbreviations For the purpose
