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International Telecommunication Union
ITU-T
G.988
TELECOMMUNICATION
STANDARDIZATION SECTOR
OF ITU
(10/2010)
SERIES G: TRANSMISSION SYSTEMS AND MEDIA,
DIGITAL SYSTEMS AND NETWORKS
Digital sections and digital line system – Optical line
systems for local and access networks
ONU management and control interface (OMCI)
specification
Recommendation ITU-T G.988
ITU-T G-SERIES RECOMMENDATIONS
TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS
INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100–G.199
GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-
TRANSMISSION SYSTEMS
G.200–G.299
INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE
SYSTEMS ON METALLIC LINES
G.300–G.399
GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS
ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC
LINES
G.400–G.449
COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450–G.499
TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600–G.699
DIGITAL TERMINAL EQUIPMENTS G.700–G.799
DIGITAL NETWORKS G.800–G.899
DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900–G.999
General G.900–G.909
Parameters for optical fibre cable systems G.910–G.919
Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s G.920–G.929
Digital line transmission systems on cable at non-hierarchical bit rates G.930–G.939
Digital line systems provided by FDM transmission bearers G.940–G.949
Digital line systems G.950–G.959
Digital section and digital transmission systems for customer access to ISDN G.960–G.969
Optical fibre submarine cable systems G.970–G.979
Optical line s
y
stems for local and access networks G.980–G.989
Access networks G.990–G.999
MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE – GENERIC AND USER-
RELATED ASPECTS
G.1000–G.1999
TRANSMISSION MEDIA CHARACTERISTICS G.6000–G.6999
DATA OVER TRANSPORT – GENERIC ASPECTS G.7000–G.7999
PACKET OVER TRANSPORT ASPECTS G.8000–G.8999
ACCESS NETWORKS G.9000–G.9999
For further details, please refer to the list of ITU-T Recommendations.
Rec. ITU-T G.988 (10/2010) i
Recommendation ITU-T G.988
ONU management and control interface (OMCI) specification
Summary
Recommendation ITU-T G.988 specifies the optical network unit (ONU) management and control
interface (OMCI) for optical access networks.
First, it specifies the managed entities of a protocol-independent management information base
(MIB) that models the exchange of information between an optical line termination (OLT) and an
optical network unit (ONU). In addition, it covers the ONU management and control channel,
protocol and detailed messages.
History
Edition Recommendation Approval Study Group
1.0 ITU-T G.988 2010-10-07 15
Keywords
G-PON, OMCI, PON, XG-PON.
ii Rec. ITU-T G.988 (10/2010)
FOREWORD
The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of
telecommunications, information and communication technologies (ICTs). The ITU Telecommunication
Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical,
operating and tariff questions and issuing Recommendations on them with a view to standardizing
telecommunications on a worldwide basis.
The World Telecommunication Standardization Assembly (WTSA), which meets every four years,
establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on
these topics.
The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1.
In some areas of information technology which fall within ITU-T's purview, the necessary standards are
prepared on a collaborative basis with ISO and IEC.
NOTE
In this Recommendation, the expression "Administration" is used for conciseness to indicate both a
telecommunication administration and a recognized operating agency.
Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain
mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the
Recommendation is achieved when all of these mandatory provisions are met. The words "shall" or some
other obligatory language such as "must" and the negative equivalents are used to express requirements. The
use of such words does not suggest that compliance with the Recommendation is required of any party.
INTELLECTUAL PROPERTY RIGHTS
ITU draws attention to the possibility that the practice or implementation of this Recommendation may
involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence,
validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others
outside of the Recommendation development process.
As of the date of approval of this Recommendation, ITU had received notice of intellectual property,
protected by patents, which may be required to implement this Recommendation. However, implementers
are cautioned that this may not represent the latest information and are therefore strongly urged to consult the
TSB patent database at http://www.itu.int/ITU-T/ipr/.
ITU 2011
All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the
prior written permission of ITU.
Rec. ITU-T G.988 (10/2010) iii
Table of Contents
Page
1 Scope ............................................................................................................................ 1
2 References..................................................................................................................... 1
3 Definitions .................................................................................................................... 5
3.1 Terms defined elsewhere ................................................................................ 5
3.2 Terms defined in this Recommendation ......................................................... 6
4 Abbreviations and acronyms ........................................................................................ 6
5 Conventions .................................................................................................................. 11
6 Reference model and terms .......................................................................................... 12
6.1 OMCI in the access network .......................................................................... 12
6.2 ONU functions ................................................................................................ 12
6.3 Support of multicast connection ..................................................................... 13
6.4 Voice over IP management ............................................................................ 13
7 Requirements of the management interface specification ............................................ 14
7.1 Configuration management ............................................................................ 14
7.2 Fault management .......................................................................................... 15
7.3 Performance management .............................................................................. 15
7.4 Security management ..................................................................................... 15
8 Protocol-independent MIB for the OMCI .................................................................... 15
8.1 Managed entities ............................................................................................. 16
8.2 Managed entity relation diagrams .................................................................. 21
9 MIB description ............................................................................................................ 43
9.1 Equipment management ................................................................................. 46
9.2 ANI management, traffic management .......................................................... 76
9.3 Layer 2 data services ...................................................................................... 98
9.4 Layer 3 data services ...................................................................................... 161
9.5 Ethernet services ............................................................................................. 166
9.6 This clause is intentionally left blank ............................................................. 175
9.7 xDSL services ................................................................................................. 175
9.8 TDM services ................................................................................................. 245
9.9 Voice services ................................................................................................. 274
9.10 Premises networks .......................................................................................... 309
9.11 This clause is intentionally left blank ............................................................. 315
9.12 General purpose MEs ..................................................................................... 315
9.13 Miscellaneous services ................................................................................... 331
9.14 Mid-span PON reach extender ....................................................................... 350
10 This clause is intentionally left blank ........................................................................... 365
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