1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T G.692TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Corrigendum 2(06/2002) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Transmission media characteristics Characteristics of optical components and subsystems Optical interfaces f
2、or multichannel systems with optical amplifiers Corrigendum 2 ITU-T Recommendation G.692 (1998) Corrigendum 2 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL
3、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 INTERCONNECTION WITH METALLIC LINES G.400G.449
4、COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.450G.499 TESTING EQUIPMENTS G.500G.599 TRANSMISSION MEDIA CHARACTERISTICS G.600G.699 General G.600G.609 Symmetric cable pairs G.610G.619 Land coaxial cable pairs G.620G.629 Submarine cables G.630G.649 Optical fibre cables G.650G.659 Characteristics
5、 of optical components and subsystems G.660G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 QUALITY OF SERVICE AND PERFORMANCE G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DIGITAL TERMINAL EQUIPMENTS G.7000G.
6、7999 DIGITAL NETWORKS G.8000G.8999 For further details, please refer to the list of ITU-T Recommendations. ITU-T Rec. G.692 (1998)/Cor.2 (06/2002) i ITU-T Recommendation G.692 Optical interfaces for multichannel systems with optical amplifiers Corrigendum 2 Summary This corrigendum contains modifica
7、tions to ITU-T Rec. G.692 (10/1998) to take account of the approval of ITU-T Rec. G.694.1 Spectral Grids for WDM Applications: DWDM Frequency Grid which now contains the DWDM frequency grid formerly contained in Annex A/G.692. Source Corrigendum 2 to ITU-T Recommendation G.692 was prepared by ITU-T
8、Study Group 15 (2001-2004) and approved under the WTSA Resolution 1 procedure on 13 June 2002. ii ITU-T Rec. G.692 (1998)/Cor.2 (06/2002) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication St
9、andardization 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),
10、 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 with
11、in ITU-Ts 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. INTELLECTUAL PROPERTY RIGHTS
12、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 me
13、mbers 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, implementors are cautioned that this may not
14、represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2002 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ITU-T Rec. G.692 (1998)/Cor.2 (06/2002) iii CONTENT
15、S Page 1) Introduction 1 2) Corrections 1 2.1) Summary. 1 2.2) Clause 2 References . 1 2.3) Clause 6.1.5 Central frequency 1 2.4) Annex A 1 2.5) Appendix II. 2 2.6) Clause V.1.1 Basic design conditions 2 ITU-T Rec. G.692 (1998)/Cor.2 (06/2002) 1 ITU-T Recommendation G.692 Optical interfaces for mult
16、ichannel systems with optical amplifiers Corrigendum 2 1) Introduction This corrigendum is made necessary by the approval of ITU-T Rec. G.694.1 Spectral grids for WDM applications: DWDM frequency grid which now contains the DWDM frequency grid formerly contained in Annex A/G.692. 2) Corrections 2.1)
17、 Summary Remove the last sentence: “A frequency grid anchored at 193.1 THz with interchannel spacings at integer multiples of 50 GHz and 100 GHz is specified as the basis for selecting channel central frequencies.“ 2.2) Clause 2 References Add the following Reference alphanumerically: ITU-T Recommen
18、dation G.694.1 (2002), Spectral grids for WDM applications: DWDM frequency grid. 2.3) Clause 6.1.5 Central frequency Modify the text of this clause as shown below: The allowed channel central frequencies used in this Recommendation are defined in ITU-T Rec. G.694.1. For channel spacings of 50 GHz on
19、 a fibre, the allowed channel frequencies are based on a 50 GHz grid with the reference frequency at 193.10 THz. For channel spacings of 100 GHz or more on a fibre, the allowed channel frequencies are based on a 100 GHz grid with the reference frequency at 193.10 THz. The table of the 50 and 100 GHz
20、 grid frequencies of the EDFA gain region is shown in Annex A. The endpoints are illustrative, not normative. Suggested channel central frequency choices for applications on G.652/G.655 fibres are contained in Table III.1. Suggested channel central frequency choices for applications on G.653 fibres
21、are contained in Table IV.1. 2.4) Annex A Remove the whole of the current text of Annex A and replace it with: “Annex A of previous revisions of this Recommendation contained the definition of the DWDM frequency grid. This grid is now defined in ITU-T Rec. G.694.1“ 2 ITU-T Rec. G.692 (1998)/Cor.2 (0
22、6/2002) 2.5) Appendix II Change the title of Appendix II as follows: Selection of the minimum channel spacing and grid reference frequency for the WDM plangrid now contained in ITU-T Rec. G.694.1 2.6) Clause V.1.1 Basic design conditions In the second sentence replace: “Annex A“ with “ITU-T Rec. G.6
23、94.1“ Geneva, 2002 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series B Means of expression: definitions, symbols, classification Series C General telecommunication statistics Series D General tariff principles Series E Overall network operation, telephone service, ser
24、vice operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, so
25、und programme and other multimedia signals Series K Protection against interference Series L Construction, installation and protection of cables and other elements of outside plant Series M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and
26、 leased circuits Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling Series R Telegraph transmis
27、sion 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 and open system communications Series Y Global information infrastructure and Internet protocol aspects Series Z Languages and general software aspects for telecommunication systems
