1、 International Telecommunication Union ITU-T G.783TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 3(02/2012) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital terminal equipments Principal characteristics of multiplexing equipment for the synchronous digital hi
2、erarchy Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks Amendment 3 Recommendation ITU-T G.783 (2006) Amendment 3 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 General G.700G.709 Coding of voice and audio signals G.710G.729 Principal characteristics of pr
5、imary multiplex equipment G.730G.739 Principal characteristics of second order multiplex equipment G.740G.749 Principal characteristics of higher order multiplex equipment G.750G.759 Principal characteristics of transcoder and digital multiplication equipment G.760G.769 Operations, administration an
6、d maintenance features of transmission equipment G.770G.779 Principal characteristics of multiplexing equipment for the synchronous digital hierarchy G.780G.789Other terminal equipment G.790G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SE
7、RVICE AND PERFORMANCE 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 Recommen
8、dations. Rec. ITU-T G.783 (2006)/Amd.3 (02/2012) i Recommendation ITU-T G.783 Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks Amendment 3 Summary Amendment 3 to Recommendation ITU-T G.783 (2006) includes text that clarifies the specification details applicable when
9、 transporting synchronous digital hierarchy (SDH) signals over the optical transport network (OTN). History Edition Recommendation Approval Study Group 1.0 ITU-T G.783 1990-12-14 XV 2.0 ITU-T G.783 1994-01-20 15 3.0 ITU-T G.783 1997-04-08 15 4.0 ITU-T G.783 2000-10-06 15 4.1 ITU-T G.783 (2000) Cor.
10、1 2001-03-15 15 4.2 ITU-T G.783 (2000) Amd. 1 2002-06-13 15 4.3 ITU-T G.783 (2000) Cor. 2 2003-03-16 15 5.0 ITU-T G.783 2004-02-06 15 5.1 ITU-T G.783 (2004) Cor. 1 2004-06-13 15 5.2 ITU-T G.783 (2004) Amd. 1 2005-07-14 15 6.0 ITU-T G.783 2006-03-29 15 6.1 ITU-T G.783 (2006) Amd. 1 2008-05-22 15 6.2
11、ITU-T G.783 (2006) Amd. 2 2010-03-09 15 6.3 ITU-T G.783 (2006) Amd. 3 2012-02-13 15 ii Rec. ITU-T G.783 (2006)/Amd.3 (02/2012) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technolog
12、ies (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 Telecommun
13、ication 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 o
14、f 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 “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operati
15、ng 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“
16、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 practi
17、ce 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 developm
18、ent 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 str
19、ongly 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 prior written permission of ITU. Rec. ITU-T G.783 (2006)/Amd.3 (02/2012) 1 Recommendation ITU-T G.783 Char
20、acteristics of synchronous digital hierarchy (SDH) equipment functional blocks Amendment 3 1) Scope This amendment contains modified text to be added to complete Recommendation ITU-T G.783 in respect of clarifying the jitter specification regarding transport over the optical transport network (OTN).
21、 2) Changes to Recommendation ITU-T G.783 (2006) 2.1) Clause 2 Add the following new references to clause 2. ITU-T G.798 Recommendation ITU-T G.798 (2010), Characteristics of optical transport network hierarchy equipment functional blocks. Replace reference 27 from Recommendation ITU-T G.783 (2006)
22、Amd. 1 (05/2008) with the following: ITU-T G.8251 Recommendation ITU-T G.8251 (2010), The control of jitter and wander within the optical transport network (OTN). 2.2) Clause 9.3.1.1 Add the following note under the title of clause 9.3.1.1. NOTE In the case where SDH RSN signals are transported over
23、 the OTN, the regenerator generation limits as given in this clause of Recommendation ITU-T G.783 do not apply. Instead, the specifications of ITU-T G.8251 are to be used. Here the jitter and wander transfer requirements for ODCp given in Annex A of ITU-T G.8251 ensure that the jitter due to the map
24、ping and de-mapping of client signals into and out of OPUk, possibly multiple times, will be acceptable and will satisfy the respective network limits of the SDH clients. The ODCp jitter generation requirements given in Annex A of ITU-T G.8251 ensure that any additional jitter produced by the ODCp w
25、ill be within limits. Printed in Switzerland Geneva, 2012 SERIES OF 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
26、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, sound programme and other multimedia signals Series K Protection against int
27、erference Series L Construction, installation and protection of cables 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
28、measuring equipment Series P Terminals and subjective and objective 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
