1、 International Telecommunication Union ITU-T G.987.2TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1(02/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Optical line systems for local and access networks 10-Gigabit-capab
2、le passive optical networks (XG-PON): Physical media dependent (PMD) layer specification Amendment 1 Recommendation ITU-T G.987.2 (2010) Amendment 1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199
3、 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCON
4、NECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 General G.900G.
5、909 Parameters for optical fibre cable systems G.910G.919 Digital sections at hierarchical bit rates based on a bit rate of 2048 kbit/s G.920G.929 Digital line transmission systems on cable at non-hierarchical bit rates G.930G.939 Digital line systems provided by FDM transmission bearers G.940G.949
6、Digital line systems G.950G.959 Digital section and digital transmission systems for customer access to ISDN G.960G.969 Optical fibre submarine cable systems G.970G.979 Optical line systems for local and access networks G.980G.989Access networks G.990G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMAN
7、CE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T
8、 G.987.2 (2010)/Amd.1 (02/2012) i Recommendation ITU-T G.987.2 10-Gigabit-capable passive optical networks (XG-PON): Physical media dependent (PMD) layer specification Amendment 1 Summary Amendment 1 to Recommendation ITU-T G.987.2 (2010) includes new values for the X/S parameters and a new note on
9、optical power penalty. History Edition Recommendation Approval Study Group 1.0 ITU-T G.987.2 2010-01-13 15 2.0 ITU-T G.987.2 2010-10-07 15 2.1 ITU-T G.987.2 (2010) Amd. 1 2012-02-13 15 ii Rec. ITU-T G.987.2 (2010)/Amd.1 (02/2012) FOREWORD The International Telecommunication Union (ITU) is the United
10、 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 Recommendat
11、ions 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 approv
12、al 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-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administratio
13、n“ 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
14、 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 req
15、uired 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 Intelle
16、ctual 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 not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. H
17、owever, 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 2012 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the
18、 prior written permission of ITU. Rec. ITU-T G.987.2 (2010)/Amd.1 (02/2012) 1 Recommendation ITU-T G.987.2 10-Gigabit-capable passive optical networks (XG-PON): Physical media dependent (PMD) layer specification Amendment 1 1) Clause 10.1 Versatile WDM configuration a) Replace Figure 10-1 with the f
19、ollowing: G.987.2(10)-Amd.1(12)_F10-11581 16001575Wavelength (nm)X/S (dB)YXG-PON1band15601260 1675Class Y (dB) N1, E1, N2a, E2a 21.5 N2b, E2b 15 S: Received power of basic band. X: Maximum total power of additional services received in the blocking wavelength range. X/S: In the mask (hatching area)
20、should not cause the XG-PON receiver to fail to meet its sensitivity requirements. Figure 10-1 X/S tolerance mask for ONU 2) Table 9-3 Optical interface parameters of 9.95328 Gbit/s downstream direction a) Replace Note 6 of Table 9-3 with the following: NOTE 6 The specified penalty must be met by op
21、tics complying with the specified launch power range. If a transmitter exhibits a higher penalty, it can still comply if it equally increases the minimum launch power while remaining under the maximum launch power. In no case should the OPP exceed 2 dB. Printed in Switzerland Geneva, 2012 SERIES OF
22、ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D General tariff principles Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems an
23、d networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cabl
24、es and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Terminals and subjective and objective
25、assessment methods Series Q Switching and signalling Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects and next-generation networks Series Z Languages and general software aspects for telecommunication systems
