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SDH复用结构的发展 SDH即同步数字系列,是80年代末期投入商用的一种先进的数字复用体系。 复用结构,这是SDH技术标准的最基本的内容之一。它表述SDH的信息流是怎样被复用起来的,它也说明进入SDH体系的可以是哪些标准接口的信号。复用结构标准最初于1987年提出,80年代末有一次修改。这就是一直沿用到1998年底的复用结构,如图1所示。
SDH Multiplexing Architecture SDH, a synchronous digital family, is an advanced digital multiplexing system put into commercial use in the late 1980s. Multiplexing architecture, which is one of the most basic aspects of SDH technology standards. It shows how SDH traffic is multiplexed, and it shows which standard interfaces can go into the SDH system. The standard for multiplexed structures was originally proposed in 1987, with one change in the late 1980s. This is the reuse structure that has been used until the end of 1998, as shown in Figure 1.