GB/T 16814-2008Methods of measurement for Synchronous digital Hierarchy (SDH) optical fiber cable line system (English PDF)

3 Abbreviations

4 System composition

5 Test signals and timing modes

6 Optical interface test

7 Electrical interface test

8 Jitter test

9 Drift test

10 Bit error testing

11 Timing and synchronization test

12 Protection switching test

13 Loopback function test

14 Check of overhead and maintenance signals

15 TCM protocol test

Foreword

This document was issued on 11 April 2008 by the State Administration for Market Regulation and the Standardization Administration of the People's Republic of China, and has been in force since 1 November 2008.

It replaces GB/T 16814-1997.

Classification: ICS 33.180.99, CCS M33.

About this edition

GB/T 16814-2008 is the current edition. It was issued on 11 April 2008 and has been in force since 1 November 2008, replacing GB/T 16814-1997.

GB/T 16814-1997 has been superseded: a specification that still cites it is citing a withdrawn edition.

The interval between issue and effect is the transition period. It exists so that producers, laboratories and buyers can requalify products, revise procedures and use up documentation before the new text becomes the one that applies. The date on this page is the official one from the record of the Standardization Administration.

Classification and status

GB/T 16814-2008 is classified under ICS 33.180.99, in the field of telecommunications. ICS is the International Classification for Standards, the same scheme used by ISO and by the national bodies of most countries, which is what allows a Chinese standard to be placed beside its foreign counterparts on subject rather than on number.

Its Chinese Standard Classification code is CCS M33. CCS is the domestic scheme, a letter for the sector and two digits for the subject within it, and it is the code by which the standard is filed and searched in China.

The GB/T prefix marks a recommended national standard. It is not, in itself, law: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it. In practice that covers most of the cases in which it will be read — a purchase specification, an inspection agreement or a certification scheme.