DSL Library, on broadband via twisted pair telephony cabling

DSL-Library


NWA-Library


About

Rob F.M. van den Brink
The Netherlands

www.joepeesoft.com
Rob.vandenBrink@tno.nl


Summary


Rob F.M. van den Brink has been acting as Rapporteur for ETSI to chair the creation of the European Spectral Management standards (1999-2009). This resulted in the publication of both parts of ETSI TR 101 830. He submitted more then one hundred DSL publications, all contributed to ETSI-TM6, over a period of 12 years (1996-2008), This had a significant impact on the current definitions/specifications in the present standards on Spectral Management and xDSL requirements. These publications are grouped as follows:

Defining a realistic test environment

The documents below changed the way DSL performance is currently measured in test setups. In the early days of ISDN and HDSL, it was common to test modems with white noise, at levels that independent on the loop length. This was far from realistic. Today, all DSL standards that followed (ADSL, SDSL, VDSL) specify mandatory performance tests, using frequency dependent noise, that changes in shape and level with the loop length. This is how crosstalk noise behaves in an operational environment with multiple DSL systems in the same cable.
This improved methodology was introduced in 1997 for VDSL (see 974t20a0), and gradually accepted within and outside ETSI for SDSL and ADSL as well (see 980p10xx).

Performance testing / Methodology

974t20a0A fixed impairment definition for variable testloopsBrink / 1997
984t43a0Noise model wish list for VDSL performance testsBrink, Kimpe / 1998
984t44a0Noise model wish list for SDSL performance testsBrink, Kimpe / 1998
992t20a0Realistic performance tests for ADSLBrink / 1999
031t24Non conflicting IPR issues, related with testingBrink / 2003

Performance testing / Overall setup

973t33r0Proposal to add a VDSL test set-up on crosstalk marginsBrink / 1997
984T27A0Proposal for SDSL performance tests (also ADSL)Brink / 1998
980p10a0Performance tests for SDSL and other long range xDSL systemsBrink / 1998-2001
980p10a1Performance tests for SDSL and other long range xDSL systemsBrink / 1998-2001
980p10a2Performance tests for SDSL, ADSL and other long-range xDSL systemsBrink / 1998-2001
980p10a3Performance tests for SDSL, ADSL and other long-range xDSL systemsBrink / 1998-2001
980p10a4Laboratory Performance tests for SDSL and ADSL systemsBrink / 1998-2001
980p10a5Laboratory Performance tests for xDSL systemsBrink / 1998-2001

Performance testing / Loop models

961t25r0VDSL - Using matched and mismatched testloopsBrink / 1996
961t26r0ADSL - Simplifying the testloop configurationsBrink / 1996
972t32r1VDSL - Proposal for VDSL testloopsBrink / 1997
974t17a0Modified insertion loss specs for the VDSL testloopsBrink / 1997
993t23a0Compromise proposal for SDSL TestloopsBrink / 1999
002t18a0Extending the specification of SDSL testloops beyond 500 kHzBrink / 2000
072w22Phrasing a valid scope for an additional test loopBrink / 2007

Performance testing / Noise models

Frequency domain models on crosstalk noise

991t20a1Revised noise models for SDSLBrink, FSAN / 1999
992t09a0Self-crosstalk update of the SDSL noise modelsBrink, FSAN / 1999
993t22a0Update of SDSL noise models, as requested by ETSI-TM6Brink, Heuvel, FSAN / 1999
994t37a0Realistic ADSL noise modelsBrink, FSAN / 1999
012t18a1Noise models for the FDD variants of ADSLBrink / 2001
064w25r1Preliminary crosscheck of VDSL2 noise modelsBrink / 2006

Time domain models on crosstalk noise

983t16a0PSD + Crest factor is not sufficient to specify noise in performance testsHeuvel, Brink / 1998
984t42a0Specification of crest distribution mask for noise in performance testsHeuvel, Brink / 1998
985t50a0Time domain requirements on noise in performance testsHeuvel, Brink / 1998

RFI noise models

963t30r0VDSL - Preliminary RFI measurements on Dutch burried cablesBrink / 1996
004w02a0Text proposal for modulating the Ingress noise generator (ADSL + SDSL)Brink / 2000
011t04a1Text proposal for modulating the Ingress noise generator (SDSL + ADSL + VDSL)Brink / 2001
012t24SDSL sensitivity to Ingress noise; preliminary measurementsBrink, Gerrits / 2001
021w12Position of several operators on RFI tones for SDSLBrink / 2002
022t33RFI tone levels for testing ADSL and SDSLBrink / 2002
031t25Making modulation of RFI tones deterministic is undesirableBrink, Gerrits / 2003
032w17Limiting crest factor on modulating RFI tonesBrink / 2003
033w06Text for informative annex on modulating RFI tonesBrink / 2003

Impulse noise models

071t29VDSL2 should also withstand "PEIN" impulse noiseHeuvel, Brink / 2006

Performance testing / Noise injection

012w15Results of ad hoc meeting on Noise InjectionBrink / 2001
013w09Solution for Noise Injection and calibration of their levelBrink / 2001
014t06Complex impedance for calibrating the injected noise levelBrink / 2001
014w16Report of the ad-hoc meeting about noise calibrationBrink
022t34Calibration of the noise injection levelBrink / 2002

Predicting DSL performance, for design and spectral management

The documents below had a significant impact on the way DSL performance is currently predicted under operational stress conditions.
It started with the creation of realistic cable models up to 30 MHz, and to collect that information for European cables in a common document (see 970p02r3). Testloop #2 of the ETSI VDSL standard is based on cable model "TP150", which represents a Dutch cable (introduced in 971t15r1).
Lateron the focus was concentrated on the creation of the current ETSI Spectral Management standard (part 2). This was a mix of consensus building on PSD templates for DSL modems ("transmitter models"), development of receiver models, and on the way crosstalk has to be estimated in a loop. Most of the content of that standard is based on the contributions below.

Modeling twisted pair cables

971t15r1VDSL - Measurements and models on Dutch cablesBrink / 1997
971t16r1VDSL - A round robin test on cable measurementsBrink / 1997
970p02r3Cable reference models for simulating metallic access networksBrink / 1997

Modelling DSL receivers

Generic models

022t35Generic detection models for performance modelingBrink / 2002
032t09Generic DMT detection modelBrink, Gerrits / 2003
033t13Extending the validity of receiver performance modelsBrink, Gerrits / 2003
042w10Additional note for generic DMT model, on bit loadingBrink / 2004
021t35Model of basic input block, within xDSL receiversBrink / 2002

Specific models

023t32Receiver performance model for ETSI compliant SDSLBrink / 2002
023t33Receiver performance model for ETSI compliant HDSL-CAPBrink / 2002
031t22Receiver performance model for ETSI compliant HDSL-CAPBrink, Gerrits / 2003
032t10Receiver performance model for "ADSL over POTS" (EC)Brink, Gerrits / 2003
032t11Receiver performance model for "ADSL over ISDN" (EC)Brink, Gerrits / 2003
033t14Receiver performance model for "ADSL.FDD over POTS"Brink, Gerrits / 2003
033t15Receiver performance models for "ADSL.FDD over ISDN"Brink, Gerrits / 2003
041t27Revised modelling of "ADSL.FDD over POTS" receivers, without echo parametersBrink / 2004
041t28Revised modelling of "ADSL.FDD over ISDN" receivers, without echo parametersBrink / 2004

Modelling DSL transmitters

ISDN, ADSL, SDSL, HDSL

022t36Transmitter models for performance evaluationsBrink / 2002
031t23Transmitter models for ADSL modemsBrink, Gerrits / 2003
051w21Results of Ad Hoc on ADSL slope near 1.1.MHzBrink / 2005
051w25Results of Ad Hoc on SDSL out-of-band spectrumBrink / 2005
042w08r1Text, for including power backoff in the SDSL + ADSL modelsBrink / 2004
043t33Proposal to complete PSD template of ADSLGerrits, Brink / 2004
052t18Signal descriptions for various ADSL2plus variantsBrink / 2005

VDSL

064t22Algorithmic approach for defining VDSL2 PSD templates for simulation purposesBrink, Heuvel, Veen / 2006
072t10Algorithmic model for VDSL2 transmittersBrink, Cordova / 2007
073t25r1Editorial improvements to the VDSL2 transmitter modelBrink, Cordova / 2007
074w20r1Merging the missing "997" values into the VDSL2 modelBrink / 2007

Modelling crosstalk in twisted pair cables

012t16Generalizing the crosstalk sum in a multi-impedance environmentBrink / 2001
043w23R1Text for resolving cumulation modelBrink / 2004
021t36Generic crosstalk models for two-node co-locationBrink / 2002
054w20Problems with proposed models for crosstalk from multiple locationsBrink / 2005
061w25Evaluating the crosstalk for a multi-node topologyBrink / 2006
063t12R2Evaluating the crosstalk for multi-node topologiesBrink / 2006
064t24Evaluating the crosstalk for multi-node topologies (Editorial update)Brink / 2006
072t09Refinements in Text Proposal on Crosstalk ModelsThony, Repond, Brink / 2007

Examples of performance evaluations (Spectral Management, part 2)

994w09a0The rationale behind TD4 on Spectral Compatibility of SDSLBrink / 1999
051t32R1Description of example scenarios on ESP/2004 in SpM2Brink / 2005

Changing DSL requirements

ADSL (ETSI TS 101 388)

963t29r0ADSL/2 - The position of the Dutch operator on ADSLBrink / 1996
003w15a0Request for additional ADSL bitratesBrink / 2000
011w10Test Sequences for ADSLBrink / 2001

SDSL (ETSI TS 101 524)

985t51a0The position of the Dutch operator on SDSLBrink / 1998
994t04a0FSAN position on the PSD proposal for SDSL in WD18Brink, FSAN / 1999

VDSL (ETSI TS 101 270)

013t24Merging of spectral allocation plans and PSD masks for VDSLHeuvel, Persico, Brink / 2001
014t24PSD masks for VDSL: inclusions of commentsHeuvel, Persico, Brink / 2001
023w13Operators need for nominal and peak PSD masks, as normative requirementsHeuvel, Brink / 2002
024t03r2PSD masks for VDSL, and corresponding templatesHeuvel, Brink / 2002
051t28Adding "shaped PSDs" capabilities to VDSL2/Cab between full 0 to 2.2 MHz bandBrink, Heuvel / 2005

Splitter requirements

983t27a0Definition of required splitter parameters for VDSL and ADSLBrink, Leerdam / 1998
983w01a0Input for a brainstorm on splitter filter requirementsBrink, Leerdam / 1998
012t45Problems with ISDN after inserting ADSL splittersLeerdam, Brink / 2001

Mixed

972t36r0HDSL - Proposal for HDSL wander specificationMaurik, Brink / 1997
961t24r0VDSL / ADSL - A compromise design impedance of 135ohmBrink / 1996
973w04a0Return loss proposal on VDSLBrink / 1997

DSL access to unbundled loops (see also SpM-1)

European regulations forced incumbent operators to unbundle their twisted pair networks. It means that multiple (competitive) operators can use the copper wires to offer broadband services via DSL equipment. This included the concept of line sharing, where equipment from one operator (POTS or ISDN) shares a wire pair with equipment from another operator (xDSL). Networks, processes and standards were never prepared for this, and a way has to developped to prevent that one modem disturbes many others in a disproportional manner.
The solution was to bound the signal levels of equipment via legal contracts, a so called "access rule" which is mandatory for granting access. But these rules were to be well specified in a meaningfull and technically-correct way. This resulted in the start of creating "part 1" of the Spectral Management standard.
The documents below have created most of this standard.
993t37a0Classification of signals for spectral management specifications on access networksBrink / 1999
994t36a0Classification of signals for spectral management specifications on access networkBrink, FSAN / 1999
001w22a1Improvement of the Reference Model for Spectral ManagementBrink / 2000
014t23Spectral Management approach in the NetherlandsBrink / 2001
021t37Harmonizing some terminology about Spectral ManagementBrink / 2002
041t26Spectral Management approach in the NetherlandsBrink, Hoefnagel / 2004
063t07R1Description of "VDSL2-NL1" signals, for spectral management in the NetherlandsBrink, Veen / 2006
064t25Description of "VDSL2-NL2" signals, for spectral management in the Netherlands.Brink, Veen / 2006
073t27r1Addition of UPBO specifications to "VDSL2-NL1 and VDSL2-NL2" signal descriptionsBrink, Cordova, Veen, Heuvel / 2007

Creation of Spectral Management Part 1 (ETSI TR 101 830-1) - for specifying national access rules

The creation of "Spectral Management, part 1" started in 1999, and provides a library of (informative) signal descriptions. It is a great help for authorities who would like to use "access rules" as mandatory requirment for granting access to a twisted-pair access network. These authorities can be an incumbent operator acting as loop provider, a industry forum of licensed operators, or a national Regulator. If the list of available "signal description" contains signal limits that are adequate for the job, such an authority can simply refer to it (or copy the text)
This standard has grown to its current size via multiple steps. It has been constructed within the standardisation body ETSI-TM6, by Rob F.M van den Brink acting as Rapporteur/Editor. A so called "living list" document contains the proposals, and a so called "draft" contains what text has achieved consensus. ETSI published various versions of this draft as standard (TR 101 830-1), as soon as sufficient content was added and agreed. The documents below show the history of that process.

Originating proposals

994w08a1Opening a first work item on Spectral ManagementBrink, FSAN / 1999

Creating the first version (v1.1.1), published in Sept 2000

990p08a0SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2000
990p08a1SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2000
990p07a0SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2000
990p07a1SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2000
990p07a2SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2000
990p07a3SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2000
tr-10183001v010101pETSI TR 101 830 - 1 (Spectral Management, part 1, version 1.1.1)Brink / 2000-09

Creating the second version (v 1.2.1), published in Aug 2001

990p08a2SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2000
990p08a3SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2001
990p08a4SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2001
990p07a4SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2001
990p07a5SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2001
990p07a6SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2001
990p07a7SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2001
tr-10183001v010201pETSI TR 101 830 - 1 (Spectral Management, part 1, version 1.2.1)Brink / 2001-08

Creating the third version (v 1.3.1), published in Dec 2002

013w15Work Item Sheet SpM-1Brink / 2001
990p08a5SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2001
990p08a6SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2001
990p08a7SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2002
990p08a8SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2002
990p08a9SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2002
990p08a10SpM-1 living list / Part 1: Definitions and Signal LibraryBrink / 2002
990p07a8SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2001
990p07a9SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2002
990p07a10SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2002
990p07a11SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2002
990p07a12SpM-1 draft / Part 1: Definitions and Signal LibraryBrink / 2002
tr-10183001v010301pETSI TR 101 830 - 1 (Spectral Management, part 1, version 1.3.1)Brink / 2002-12

Creating the fourth version (v 1.4.1), published in March 2006

051w18R1Work item Sheet, to revise SpM-1Brink / 2005
m05p05a01SpM-1 Living List / Definitions and Signal LibraryBrink / 2005
m05p05a02SpM-1 Living List / Definitions and Signal LibraryBrink / 2005
m05p05a03SpM-1 Living List / Definitions and Signal LibraryBrink / 2005
m05p05a04SpM-1 Living List / Definitions and Signal LibraryBrink / 2005
m05p06a01SpM-1 Draft / Definitions and Signal LibraryBrink / 2005
m05p06a02SpM-1 Draft / Definitions and Signal LibraryBrink / 2005
tr-10183001v010401pETSI TR 101 830 - 1 (Spectral Management, part 1, version 1.4.1)Brink / 2006-03

Creating the fifth version (v 1.5.1), under construction

TM-06042-LL-a01SpM-1 Living List / Definitions and Signal LibraryBrink / 2006
m06p09a00SpM-1 Living List / Definitions and Signal LibraryBrink / 2006
m06p09a01SpM-1 Living List / Definitions and Signal LibraryBrink / 2007
m06p09a02SpM-1 Living List / Definitions and Signal LibraryBrink / 2007
m06p09a03SpM-1 Living List / Definitions and Signal LibraryBrink / 2007
m06p09a04SpM-1 Living List / Definitions and Signal LibraryBrink / 2007
m06p09a05SpM-1 Living List / Definitions and Signal LibraryBrink / 2008
m06p09a06SpM-1 Living List / Definitions and Signal LibraryBrink / 2008
m06p09a07SpM-1 Living List / Definitions and Signal LibraryBrink / 2008
m06p10a00SpM-1 Draft / Definitions and Signal LibraryBrink / 2008
m06p10a01SpM-1 Draft / Definitions and Signal LibraryBrink / 2008

Creation of Spectral Management Part 2 (ETSI TR 101 830-2) - algorithms for performance simulations

Originating proposals

014t22Calculation methods for performance evaluationsBrink / 2001

Creating the first version (v 1.1.1), published in Oct 2005

014w27Work Item Sheet SpM-2Brink / 2001
m01p21a0SpM-2 Living List / Technical methods for performance evaluationsBrink / 2002
m01p21a1SpM-2 Living List / Technical methods for performance evaluationsBrink / 2002
m01p21a2SpM-2 Living List / Technical methods for performance evaluationsBrink / 2002
m01p21a3SpM-2 Living List / Technical methods for performance evaluationsBrink / 2002
m01p21a4SpM-2 Living List / Technical methods for performance evaluationsBrink / 2003
m01p21a5SpM-2 Living List / Technical methods for performance evaluationsBrink / 2003
m01p21a6SpM-2 Living List / Technical methods for performance evaluationsBrink / 2004
m01p21a7SpM-2 Living List / Technical methods for performance evaluationsBrink / 2004
m01p21a8SpM-2 Living List / Technical methods for performance evaluationsBrink / 2004
m01p21a9SpM-2 Living List / Technical methods for performance evaluationsBrink / 2004
m01p21a10SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p21a11SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p21a12SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p21a13SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p21a14SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p21a15SpM-2 Living List / Technical methods for performance evaluationsBrink / 2005
m01p20a0SpM-2 draft / Technical methods for performance evaluationsBrink / 2002
m01p20a1SpM-2 draft / Technical methods for performance evaluationsBrink / 2002
m01p20a2SpM-2 draft / Technical methods for performance evaluationsBrink / 2002
m01p20a3SpM-2 draft / Technical methods for performance evaluationsBrink / 2002
m01p20a4SpM-2 draft / Technical methods for performance evaluationsBrink / 2003
m01p20a5SpM-2 draft / Technical methods for performance evaluationsBrink / 2003
m01p20a6SpM-2 draft / Technical methods for performance evaluationsBrink / 2004
m01p20a7SpM-2 draft / Technical methods for performance evaluationsBrink / 2004
m01p20a8SpM-2 draft / Technical methods for performance evaluationsBrink / 2004
043t32R1Resolving the comments from AbCBrink / 2004
m01p20a9SpM-2 draft / Technical methods for performance evaluationsBrink / 2004
m01p20a10SpM-2 draft / Technical methods for performance evaluationsBrink / 2005
m01p20a12SpM-2 draft / Technical methods for performance evaluationsBrink / 2005
m01p20a13SpM-2 draft / Technical methods for performance evaluationsBrink / 2005
m01p20a14SpM-2 draft / Technical methods for performance evaluationsBrink / 2005
m01p20a15SpM-2 draft / Technical methods for performance evaluationsBrink / 2005
053w23a1Resolving comments from SpM2 AbC.Brink / 2005
tr-10183002v010101pETSI TR 101 830 - 2 (Spectral Management, part 2, version 1.1.1)Brink / 2005

Creating the second version (v 1.2.1), under construction

061w23Work Item Sheet for revising SpM-2Brink / 2006
053w21Unofficial Living List for revising SpM-2Brink / 2005
054t18r1Unofficial Living List for revising SpM-2Brink / 2005
m06p05a00SpM-2 Living List / Technical methods for performance evaluationsBrink / 2006
m06p05a01SpM-2 Living List / Technical methods for performance evaluationsBrink / 2006
m06p05a02SpM-2 Living List / Technical methods for performance evaluationsBrink / 2006
m06p05a03SpM-2 Living List / Technical methods for performance evaluationsBrink / 2006
m06p05a04SpM-2 Living List / Technical methods for performance evaluationsBrink / 2007
m06p05a05SpM-2 Living List / Technical methods for performance evaluationsBrink / 2007
m06p05a06SpM-2 Living List / Technical methods for performance evaluationsBrink / 2007
m06p05a07SpM-2 Living List / Technical methods for performance evaluationsBrink / 2008
m06p06a01SpM-2 Draft / Technical methods for performance evaluationsBrink / 2007
m06p06a02SpM-2 Draft / Technical methods for performance evaluationsBrink / 2008
m06p06a03SpM-2 Draft / Technical methods for performance evaluationsBrink / 2008
m06p06a04SpM-2 Draft / Technical methods for performance evaluationsBrink / 2008
m06p06a05SpM-2 Draft / Technical methods for performance evaluationsBrink / 2008
m06p06a06SpM-2 Draft / Technical methods for performance evaluationsBrink / 2008
082t24r2Resolving the AbC of SpM-2Brink / 2008

Meetings for creating the Spectral Management standards

Workplans (agenda within ETSI TM6 meetings)

001w03a1Workplan for Spectral Management ContributionsBrink / 2000
002w02a0Workplan for Spectral Management ContributionsBrink / 2000
004w01a0Workplan for Spectral Management ContributionsBrink / 2000
011w05Workplan for Spectral Management ContributionsBrink / 2001
012w07Workplan for Spectral Management ContributionsBrink / 2001
013w02Workplan for Spectral Management ContributionsBrink / 2001
021w03Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2002
022w06Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2002
023w09r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2002
031w07Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2003
032w16Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2003
033w05Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2003
041w10r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2004
042w05Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2004
043w05r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2004
051w05Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2005
052w04R1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2005
053w04a1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2005
054w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2005
061w04r2Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2006
062w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2006
063w04Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2006
064w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2006
071w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2007
072w04Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2007
074w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2007
082w04r1Workplan for Spectral Management Contributions (part 1 and 2)Brink / 2008

Meeting reports

052w10R1SpM-1 & SpM-2 meeting reportBrink / 2005
053w14SpM-1 & SpM-2 meeting reportBrink / 2005
054w14SpM-1 & SpM-2 meeting reportBrink / 2005
061w14SpM-1 & SpM-2 meeting reportBrink / 2006
062w14SpM-1 & SpM-2 meeting reportBrink / 2006
063w14r1SpM-1 & SpM-2 meeting reportBrink / 2006
064w14SpM-1 & SpM-2 meeting reportBrink / 2006
071w14SpM-1 & SpM-2 meeting reportBrink / 2007
072w14SpM-1 & SpM-2 meeting reportBrink / 2007
074w14r1SpM-1 & SpM-2 meeting reportBrink / 2007
082w14r1SpM-1 & SpM-2 meeting reportBrink / 2008



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created by: Rob F.M. van den Brink, The Netherlands