QTT Quasi Transmission Trunking

Trunk Tester is equipment that is used to test trunk transmission equipment of the communications system.

干线综合测试仪是对通信系统中的干线传输设备进行检测的仪器。

With railway communication steps to social markets, facing the fast increasing needing of bandwidth communication businesses, the shortcomings of railway communication Arterial transmission net is more and more prominent, such as, little bandwidth capacity, too many network stations, without the unified net management, etc.

在本文的组网方案中，通过对现有网络资源和业务量的调查与分析，结合网络覆盖地域的具体特点，充分利用既有光纤网络，确定了系统的拓扑结构和传输网的容量；根据目前和未来发展的业务需求，确定了干线传输网的速率等级：根据DWDM系统设计原则，确定了合波器的输出功率、光放大器和光接口的参数，并对各站点的设备进行了合理配置。