SDH是现代光纤通信中广泛应用的数据传输格式,在SDH帧结构中，前9列为开销字节，它包含了很多重要的信息，本程序为SDH开销的接收处理，查找帧头，分频，勤务话字节E1异步fifo。可拆为三段源代码，不知道能不能抵三个程序-SDH is a modern optical fiber communication is widely used in data transmission format, in the SDH frame structure, as the former 9 overhea

异步fifo的设计，能够很好的的完成，数据的缓冲，内部有ram存储器-The design of asynchronous fifo， Asynchronous fifo design, can be a good completion of the data buffer, internal ram memory