T-REC-G.102-198811-I!!PDF-E传输性能目标与建议.pdfVIP

INTERNATIONAL TELECOMMUNICATION UNION TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Recommendation (Extract from the ) NOTES 1 ITU-T Recommendation G.102 was published in Fascicle III.1 of the Blue Book . This file is an extract from the Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below). 2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency.  ITU 1988, 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Recommendation G.102 Fascicle III.1 - Rec. G.102 TRANSMISSION PERFORMANCE OBJECTIVES AND RECOMMENDATIONS (Geneva, 1980) 1 General The CCITT has drawn up (or is in the process of studying) Recommendations concerning transmission impairments and their permissible magnitude with the object of achieving satisfactory performance of the network. Such impairments include for example: a) loudness rating (LR) and loss, b) noise, c) attenuation distortion, d) crosstalk, e) single tone interference, f) spurious modulation, g) effects of errors in digital systems. Some Recommendations state object