一、引言在电信垄断的年代，传输网一直作为电信企业的内部资源使用，不直接面对外部客户。在网络建设上，传输网具有一定的超前性，建成后则变动较少。基于这些特点，所以在传输网的建设上普遍缺乏成本意识，对它的管理也一直不如业务网那样迫切和重视。但近年来，情况发生了 I. INTRODUCTION In the era of monopoly of telecommunications, the transmission network has been used as the internal resource of telecommunications enterprises and has not directly faced external customers. In the network construction, transmission network has a certain advance, after the completion of the change is less. Based on these characteristics, so the transmission network construction generally lack of cost awareness, its management has been as urgent as the business network and attention. But in recent years things have happened