“光端机”可以说是国内光纤接入领域应用最为广泛的产品,在经历了多年的辉煌之后,目前国内光端机市场正酝酿着一场巨变。一方面,近两年来宽带接入的普及和数据业务的高速发展,对以PDH技术为代表的传统光端机产品提出了严峻的挑战,技术上的局限性使其越来越难以满足多样化、个? “Guangduan Ji” can be said that the field of domestic fiber optic access the most widely used products, after many years of brilliant, the domestic optical market is brewing a tremendous change. On the one hand, the popularization of broadband access and the rapid development of data services in the past two years have posed severe challenges to the traditional optical transceiver products represented by PDH technology. The technical limitations make it more and more difficult to meet the diversification. ?