Sdh & Dwdm Technology Applications, In The In Puyang Local Network

As the telecommunications transmission technology continues to develop, synchronous digital hierarchy (SDH) gradually replaced the quasi-synchronous digital hierarchy (PDH). SDH system with large transmission capacity, networking flexibility, a bit long-distance transmission of higher quality and therefore its widely used in optical fiber transmission system, a communications operator building optical transmission network of mainstream technology.DWDM is a combination of a group can use a fiber-optical wavelength for transmission. This is a fiber used in the existing Internet backbone increase bandwidth laser technology, so, given the information transmission capacity, can reduce the need for the total quantity of fiber, greatly improve the transfer of resources utilization. DWDM is a key advantage of the agreement and its transmission speed is not relevant. Based on DWDM network can use IP protocol, ATM, SONET / SDH, Ethernet protocol to transmit data, so the network can be based on DWDM in a laser channels at different speeds transmission of different types of data traffic.SDH technology and DWDM technology for communications transmission network in the planning and construction to provide a wealth of network structure and configuration of applications. This paper in the presentation and analysis of DWDM and SDH technical characteristics on the basis of Puyang local transmission network with the practice of building on the metro construction of the transmission network principles and requirements, and based on the author encountered in the actual work conditions and treatment, From the network planning, equipment selection, project implementation, the practical effect of such areas on the metro transmission networks in the actual building and the development of specific measures, the paper on the contents of the other metro construction of the transmission network has a reference.