期刊名称：International Journal of Electronics Communication and Computer Engineering
印刷版ISSN：2249-071X
电子版ISSN：2278-4209
出版年度：2012
卷号：3
期号：5
页码：1072-1074
出版社：IJECCE
摘要：The Information over an optical fiber is transmitted by turning light on and off and for extraction of this information from bits the SONET/SDH technique were used. These optical links use a low level framing protocol to transmit information and SONET/SDH is used to define this low level protocol. By “framing”, we mean a block of bits (or octets) which have a structure, and which utilize some technique which allows us to find the boundaries of that frame structure
