目前,电话公司在寻求更多收入的同时,正在提供基本服务上减少运转费用。随着技术进步,这些因素导致建立一个智能网络,特别是在网络的传输方面。智能传输网络可用同步传输,以降低成本,提高收入。同步传输设备已在安装,在提供基本服务时降低成本,提供了增加收入的机会。同步传输的主要好处通过两个独特的性能。其一是提供带宽管理。回路和局间的网络都需要在各个64kbit/s声道(DSO_s),以及象 Currently, telephone companies are reducing their operating costs by providing basic services while seeking more revenue. As technology advances, these factors lead to the establishment of an intelligent network, especially in terms of network transmission. Intelligent transmission network can be used to synchronize transmission, to reduce costs and increase revenue. Simultaneous transmission equipment is already installed, reducing costs while providing basic services, offering the opportunity to increase revenue. The main benefits of synchronous transmission are through two unique features. One is to provide bandwidth management. Both the loop and the interoffice networks need to operate on each 64 kbit / s channel (DSO_s), as well as