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  DWDM is often used by telecommunications, cable and data centers as part of their optical transport network.   Carrier Transport Network The carrier transport network is made up of several layers of aggregation called the access network, metro aggregation network, edge network and the core backbone network. DWDM is most often used in the metro aggregation network and the core backbone network.   DWDM in the metro aggregation network is used to combine data from several cities. As service providers bring more computing capabilities closer to their customers, DWDM is also flexible enough to meet their needs for higher bandwidth aggregation as they begin to converge more data into a single node to compute. The core backbone often deals with the high-speed switching of large amounts of data between their major central offices, which can span across several regions, states or even countries, which is also ideal for using DWDM.   If need more information, welcome to contact HTF. www.htfu

In modern society, mobile phones have become an indispensable communication tool in our daily lives. When we dial a phone number and talk to relatives and friends far away, there is actually a series of complex and sophisticated working principles hidden behind it. Do you know how signals are transmitted when you are talking to relatives and friends? The first step in a mobile phone call is the transmission of the signal. When the call is connected, the mobile phone will continue to send signals to the nearby base station, telling the base station to transmit the signal. The base station will transmit the signal to the nearest data center, and then pass the signal through the aggregation layer, backbone network, and core network. After being transmitted, it passes through the core network, backbone network, aggregation layer, and base station, and then the signal is delivered to the target mobile phone. As shown in the figure below, in the process of signal transmission, DWDM optical t

  1. Internal network of data center Different types of applications have different requirements for  data center networks . The front end network usually adopts TCP protocol, and IP/ Ethernet network technology becomes the mainstream of  the front end network , with low cost and good scalability. Storage networks have been pursuing large bandwidth and high throughput to maximize disk and CPU efficiency. FC technology with higher Ethernet speeds over the same period was adopted in the late 1990s. In the 20th century, with the scale application of higher speed SSDS, especially the recent emergence of NVMe technology with high speed and low latency, storage requires faster and more efficient networks. The computing network mainly adopts InfiniBand private network, which is typically represented by HPC and other high-performance services. Low delay is its ultimate pursuit. However, with the development of RoCE technology, Ethernet has been widely used in computing network. In view of th

  Synopsis The simultaneous transmission of two or more optical wavelength signals through different optical channels in the same optical fiber is called optical wavelength division multiplexing (WDM) technology. Reuse types Optical WDM includes frequency division multiplexing and WDM Optical frequency division multiplexing (FDM) technology and optical wavelength division multiplexing (WDM) technology have no obvious difference, because light wave is a part of electromagnetic wave. The frequency of light and wavelength has a single corresponding relationship. In general, optical frequency division multiplexing is a subdivision of optical frequencies. Optical channels are very dense. Wavelength division multiplexing (WDM) refers to the coarse division of optical frequency, the optical channels are far apart, and even in different Windows of the fiber. Structure Wavelength division multiplexer and demultiplexer (also known as combined wave/splitter) are placed on both ends of the optical