Dense Wavelength Division Multiplexing, an optical technology used to increase bandwidth over existing fiber optic backbones.
DWDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. In effect, one fiber acts like multiple virtual fibers. To multiplex eight OC -48 signals into one fiber, it would increase the carrying capacity of that fiber from 2.5 Gb/s to 20 Gb/s. Currently, because of DWDM, single fiber has been able to transmit data at capacity up to multiple of 100Gb/s.
A key advantage to DWDM is that it's protocol- and bit-rate-independent. DWDM-based network can transmit data in form of IP, ATM, SONET /SDH, and Ethernet, and handle bit rates between 100 Mb/s and 2.5 Gb/s. Therefore, DWDM-based network can carry different types of traffic at different speed over an optical channel. From a QoS standpoint, DWDM-based network provides a cost effective solution to customers' bandwidth demands and protocol changes within quick response time.
Fiber@Home already deployed the latest DWDM devices of Huawei and Ciena to build 100Gbps Nationwide Transmission Network to serve the client demands. Clients of Fiber@Home can easily migrate their legacy transmission to the DWDM carrier for smooth uninterrupted and high capacity transmission path.
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