就在几年之前，电信运营商的注意力还集中在如何解决长途骨干光纤网络容量的问题上。众多的设备制造商纷纷投入精力研发DWDM产品，DWDM也成广电信市场上最热的热点，多家公司因为在竞争对手之前推出产品而赚了一大笔钱。今天，M给带宽容量已十分充足，并且具备厂向太比特或更高 Just a few years ago, telecom operators also focused their attention on how to deal with the long-haul backbone fiber network capacity. Numerous equipment manufacturers have devoted themselves to the research and development of DWDM products. DWDM has also become the hottest hotspot in the wide telecommunications market. Many companies make a large sum of money because of their products being released before their competitors. Today, M gives sufficient bandwidth and has factory-to-terabit or higher capacity