I NTERNATIONAL T ELECOMMUNICATION U NION
Telecommunication
Standardization Bureau
Geneva, 15 November 2000
Ref:
TSB Circular 7
COM 15/PR
Tel:
Fax:
+41 22 730 5235
+41 22 730 5853
tsbsg15@itu.int
E-mail
Subject:
- To Administrations of Member States of
the Union
Copy:
- To ITU-T Sector Members;
- To ITU-T Associates;
- To the Chairman and Vice-Chairmen of
Study Group 15;
- To the Director of the Telecommunication
Development Bureau;
- To the Director of the Radiocommunication
Bureau
Meeting of Study Group 15 with a view to approving
14 draft revised and 5 draft new Recommendations in
accordance with the provisions of Resolution 1, Section 9,
of WTSA (Montreal, 2000)
Geneva, 5 and 9 February 2001
Dear Sir/Madam,
1
At the request of the Chairman of Study Group 15, Optical and other transport networks, I
have the honour to inform you that this Study Group, which will meet from 5 to 9 February 2001,
intends to apply the procedure described in Resolution 1, Section 9, of WTSA (Montreal, 2000) for
the approval of 14 revised Recommendations and of 5 new Recommendations.
2
The summaries and locations of the draft revised ITU-T Recommendations and draft new
ITU-T Recommendations proposed for approval will be found in Annex 1.
3
Any ITU Member State, Sector Member or Associate aware of a patent held by itself or
others which may fully or partly cover elements of the draft Recommendations proposed for
approval is requested to disclose such information to TSB, in accordance with TSB patent policy
(see Appendix III to WTSA Resolution 1).
Available patent information can be accessed on-line via the ITU-T Website.
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4
Having regard to the provisions of Resolution 1, Section 9, I should be grateful if you
would inform me by 2400 hours UTC on 24 January 2001 whether your Administration assigns
authority to Study Group 15 that these draft revised or new Recommendations should be considered
for approval at the Study Group meeting.
Should any Member States be of the opinion that consideration for approval should not
proceed, they should advise their reasons for disapproving and indicate the possible changes that
would facilitate further consideration and approval of the draft revised or new Recommendations.
5
If 70% or more of the replies from Member States support consideration for approval of
these draft revised or new Recommendations at the Study Group meeting, one Plenary session will
be devoted on 5 February 2001 to apply the approval procedure. In cases where contributions have
been received proposing changes to the text of draft revised and new Recommendations (other than
those of an editorial nature presented by the Rapporteur/Editor) their approval may take place at the
closing Plenary on 9 February 2001.
I accordingly invite your Administration to send a representative to the meeting. The
Administrations of Member States of the Union are invited to supply the name of the head of
their delegation. If your Administration wishes to be represented at the meeting by a recognized
operating agency, a scientific or industrial organization or another entity dealing with
telecommunication matters, the Director should be duly informed, in accordance with Article 19,
No. 239, of the ITU Convention.
6
The agenda, registration form and all relevant information concerning the Study Group 15
meeting will be available from Collective-letter 1/15.
7
After the meeting, the Director of TSB will notify, in a circular, the decision taken on these
Recommendations. This information will also be published in the ITU Operational Bulletin.
Yours faithfully,
H. Zhao
Director of the Telecommunication
Standardization Bureau
Annex: 1
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ANNEX 1
(to TSB Circular 7)
Summaries and locations of the ITU-T Recommendations
for approval at the meeting of Study Group 15 (Geneva, 5-9 February 2001)
1.
Draft revised ITU-T Recommendation G.671 - Transmission characteristics of optical
components and subsystems
(published in COM 15-2)
This Recommendation covers the transmission related aspects of all types of optical components
used in long haul networks and access networks. A broad range of types of fibre-optic components
are included in this recommendation. This Recommendation also includes transmission
characteristics of optical components under the full range of operating conditions, but does not
specify the operating service conditions, installation aspects, or other aspects of components not
affecting the optical transmission path. This document also draws upon the relevant IEC definitions
and test methods where applicable.
2.
Draft new ITU-T Recommendation G.709 - Network node interface for the Optical
Transport Network (OTN)
(published in COM 15-16)
This Recommendation provides the requirements for the Optical Transport Hierarchy (OTH)
signals at the Network Node Interface, in terms of:
 definition of an Optical Transport Module of order n (OTM-n);
 structures for an OTM-n;
 formats for mapping and multiplexing client signals;
 functionality of the overheads.
3.
Draft revised ITU-T Recommendation G.774 - Synchronous Digital Hierarchy (SDH)
management information model for the network element view
(published in COM 15-5)
This Recommendation provides an information model for the synchronous digital hierarchy (SDH).
This model describes the managed object classes and their properties that are useful to describe
information exchanged across interfaces defined in M.3010 telecommunications management
network (TMN) architecture. This Recommendation specialises the generic object classes of
Recommendation M.3100 to provide management information specifically for the SDH.
4.
Draft revised ITU-T Recommendation G.774.1 - Synchronous Digital Hierarchy (SDH)
bidirectional performance monitoring for the network element view
(published in COM 15-6)
This Recommendation provides an information model for the Performance Monitoring of
Synchronous Digital hierarchy (SDH) Network. This model describes the managed object classes
and their properties for the performance monitoring function, as defined in Recommendation G.784
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and as related to SDH Network Elements. These objects are useful to describe information
exchanged across interfaces defined in M.3010 Telecommunications Management Network (TMN)
architecture for the management of the performance monitoring function.
5.
Draft revised ITU-T Recommendation G.774.2 - Synchronous Digital Hierarchy (SDH)
configuration of the payload structure for the network element view
(published in COM 15-7)
This Recommendation provides an information model for the Payload Configuration Management
of Synchronous Digital Hierarchy (SDH) Networks. This model describes the managed object
classes and their properties for the Payload Configuration function as related to SDH Network
Elements. These objects are useful to describe information exchanged across interfaces defined in
Recommendation M.3010 Telecommunications Management Network (TMN) architecture for the
management of the Payload Configuration function.
6.
Draft revised ITU-T Recommendation G.774.3 - Synchronous Digital Hierarchy (SDH)
management of multiplex-section protection for the network element view
(published in COM 15-8)
This Recommendation provides an information model for the Synchronous Digital Hierarchy
(SDH). This model describes the managed object classes and their properties for the protection
switching function, as defined in ITU-T Recommendation G.803 and as related to SDH
transmission resources. These objects are useful to describe information exchanged across
interfaces defined in ITU-T Recommendation M.3010 Telecommunications Management Network
(TMN) architecture for the management of the protection function.
7.
Draft revised ITU-T Recommendation G.774.4 - Synchronous Digital Hierarchy (SDH)
management of the subnetwork connection protection for the network element view
(published in COM 15-9)
This Recommendation provides an information model for the management of subnetwork
connection protection of Synchronous Digital Hierarchy (SDH) subnetwork. This model describes
the managed object classes and their properties for the subnetwork connection protection function,
as defined in Recommendation G.803 and as related to SDH network elements. These objects are
useful to describe information exchanged across interfaces defined in M.3010 Telecommunications
Management Network (TMN) architecture for the management of the subnetwork connection
protection function.
8.
Draft revised ITU-T Recommendation G.774.5 - Synchronous Digital Hierarchy (SDH)
management of connection supervision functionality (HCS/LCS) for the network
element view
(published in COM 15-10)
This Recommendation provides an information model for the Synchronous Digital Hierarchy
(SDH) Network. This model describes the managed object classes and their properties for the
management of Connection Supervision Functionality (HCS/LCS), as defined in Recommendation
G.783 and as related to SDH network Elements. These objects are useful to describe information
exchanged across interfaces defined in M.3010 Telecommunications Management Network (TMN)
architecture.
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9.
Draft revised ITU-T Recommendation G.774.6 - Synchronous Digital Hierarchy (SDH)
unidirectional performance monitoring for the network element view
(published in COM 15-11)
This Recommendation provides an information model for the performance monitoring of
Synchronous Digital Hierarchy (SDH) network. This model describes the managed object classes
and their properties for the performance monitoring function of unidirectional paths and sections, as
defined in Recommendation G.784 and as related to SDH network elements. These objects are
useful to describe information exchanged across interfaces defined in Recommendation M.3010
Telecommunications Management Network (TMN) architecture for the management of the
performance monitoring function.
10.
Draft revised ITU-T Recommendation G.774.7 - Synchronous Digital Hierarchy (SDH)
management of lower order path trace and interface labelling for the network element
view
(published in COM 15-12)
This Recommendation provides an information model for the Management of Lower Order Path
Trace and Interface Labelling in Synchronous Digital Hierarchy (SDH) Networks. This model
describes the managed object classes and their properties for the Lower Order Path Trace and
Interface Labelling functions as related to SDH Network Elements. These objects are useful to
describe information exchanged across interfaces defined in Recommendation M.3010
Telecommunications Management Network (TMN) architecture for the management of the Lower
Order Path Trace and Interface Labelling functions.
11.
Draft revised ITU-T Recommendation G.774.8 - Synchronous Digital Hierarchy (SDH)
management of radio-relay systems for the network element view
(published in COM 15-13)
This Recommendation provides an information model for the Synchronous Digital hierarchy (SDH)
Radio-Relay Network Elements. This model describes the managed object classes and their
properties for the Radio Synchronous Physical Interface and the protection function of sections
having such a physical interface. These objects are useful to describe information exchanged across
interfaces defined in Recommendation M.3010 Telecommunications Management Network (TMN)
architecture for the management of the Radio-Relay Network Elements.
12.
Draft revised ITU-T Recommendation G.774.9 - Synchronous Digital Hierarchy (SDH)
configuration of linear multiplex section protection for the network element view
(published in COM 15-14)
This Recommendation provides an information model for the Synchronous Digital Hierarchy
(SDH) Network. This model describes the managed object classes and their properties for the
configuration of the protection switching function, as defined in Recommendations G.805 and
G.774.3 and as related to SDH transmission resources. These objects are useful to describe
information exchanged across interfaces defined in M.3010 Telecommunications Management
Network (TMN) architecture for the configuration of the protection function. The protection
switching scheme of an SDH network element is usually set up autonomously by the network
element according to its make-up and mode of operation. When this is not possible, the information
model defined by this Recommendation will be used. Post-configuration management of the
protection function is described in Recommendation G.774.3.
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13.
Draft new ITU-T Recommendation G.774.10 - Synchronous Digital Hierarchy (SDH)
Multiplex Section (MS) shared protection ring management for the network element
view
(published in COM 15-15)
This Recommendation provides an information model for the Synchronous Digital Hierarchy
(SDH) Network. This model describes the managed object classes and their properties for the
configuration and post-configuration management of the protection switching function of SDH
Multiplex Section (MS) Shared Protection Ring (SPR), as defined in Recommendations G.803,
G.841 and G.842. These objects are useful to describe information exchanged across interfaces
defined in M.3010 Telecommunications Management Network (TMN) architecture for the
configuration and post-configuration management of the protection function.
14.
Draft new ITU-T Recommendation G.959.1 - Optical transport network physical
layer interfaces
(published in COM 15-17)
This Recommendation focuses on optical parameter values for pre-OTN single channel and
multichannel inter-domain interfaces, and provides a framework for OTN physical interfaces.
15.
Draft new ITU-T Recommendation G.989.1 - Phoneline networking transceivers foundation
(published in COM 15-18)
This Recommendation specifies the basic characteristics of devices designed for the transmission of
data over in-premises phoneline networks. These devices are intended to be compatible with
existing telephony devices on the in-premises phoneline network. Additionally the
Recommendation provides for spectrum notching for compatibility with Amateur Radio services.
This Recommendation defines:
16.

the system reference model for these devices;

the PSD mask;

the line signal frame format;

the media access protocol;

basic electrical characteristics.
Draft new ITU-T Recommendation G.991.2 - Single-Pair High-Speed Digital
Subscriber Line (SHDSL) transceivers
(published in COM 15-3)
Recommendation G.991.2 describes a transmission method for data transport in
telecommunications access networks. SHDSL transceivers are designed primarily for duplex
operation over mixed gauge two-wire twisted metallic pairs. Optional four-wire operation is
supported for extended reach applications. Optional signal regenerators for both single-pair and
two-pair operation are specified, as well. SHDSL transceivers are capable of supporting selected
symmetric user data rates in the range of 192 kbit/s to 2312 kbit/s using a Trellis Coded Pulse
Amplitude Modulation (TC-PAM) line code. They are designed to be spectrally compatible with
other transmission technologies deployed in the access network, including other DSL technologies.
SHDSL transceivers do not support the use of analog splitting technology for coexistence with
either POTS or ISDN. Regional requirements, including both operational differences and
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performance requirements, are specified in Annexes A, B, and C. Requirements for signal
regenerators are specified in Annex D. Annex E describes application-specific framing modes that
may be supported by SHDSL transceivers.
See G.992.1, Annex H [1] for specifications of transceivers for use in networks with existing TCMISDN service (as specified in G.961, Appendix III [B1]).
17.
Draft revised ITU-T Recommendation G.994.1 - Handshake procedures for Digital
Subscriber Line (DSL) transceivers
(published in COM 15-4)
This Recommendation provides a flexible mechanism for Digital Subscriber Line (DSL)
transceivers to exchange capabilities and to select a common mode of operation. It includes
parameters relating to service and application requirements as well as parameters pertinent to
various DSL transceivers. Recommendation G.994.1 is currently an integral part of the start-up
procedure for Recommendations G.991.2, G.992.1 and G.992.2. It is anticipated that future DSL
Recommendations will also be able to make use of this Recommendation. Provisions are also
included for exchanging non-standard information.
18.
Draft revised ITU-T Recommendation G.995.1 - Overview of Digital Subscriber Line
(DSL) Recommendations
(published in COM 15-20)
Recommendation G.995.1 provides the necessary guidance and an overview of the DSL family of
Recommendations and is therefore informative. Specifically, Recommendation G.995.1 contains an
overview of the DSL family of Recommendations, and a description of how the various
Recommendations in this family are related. It also contains a definition of a generic system
reference configuration and how it relates to the system reference models of the DSL
Recommendations. Additionally, the definition of a generic protocol reference architecture for DSL
Recommendations and derivations of the appropriate user or management plane protocol reference
architectures for the DSL Recommendations is included. Also illustrations of the data service
presentation options using the DSL Recommendations is provided. A glossary of the terms used in
the DSL Recommendations is also included.
This revision of the Recommendation G.995.1 includes necessary overview material for the new
DSL Recommendations to provide a complete description of all the ITU DSL Recommendations.
19.
Draft revised ITU-T Recommendation G.996.1 - Test procedures for Digital
Subscriber Line (DSL) transceivers
(published in COM 15-19)
This Recommendation describes the testing procedures for ITU Digital Subscriber Line (DSL)
Recommendations. The testing procedures described herein include methods for testing DSL
transceivers in the presence of crosstalk from other services, Radio Frequency ingress, impulse
noise and POTS signalling. Test loops and in-home wiring models are specified for different
regions of the world for use during DSL performance testing. Other DSL Recommendations
reference this Recommendation for testing procedures and configurations. This Recommendation
does not specify performance requirements for these other Recommendations; it only specifies the
procedures for measuring the performance requirements for a particular Recommendation.
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