Optical communication is the communication with light wave as the carrier. There are two ways to increase the optical bandwidth: one is to increase the single-channel transmission rate of the optical fiber; The second is to increase the number of wavelengths transmitted in a single fiber, that is, wavelength division multiplexing technology (WDM).
At present, broadband metropolitan area network (BMAN) is becoming a hot spot of information construction, DWDM (Dense wavelength division multiplexing) huge bandwidth and transmission data transparency, is undoubtedly the preferred technology in today’s optical fiber application field. However, MAN has the characteristics of short transmission distance, flexible topology and multiple access types. For example, copying DWDM, which is mainly used for long-distance transmission, will inevitably cost too much. At the same time, early DWDM is also difficult to adapt to flexible diversity such as MAN. Faced with the need for broadband in this low-cost metropolitan area, CWDM (coarse wavelength division multiplexing) technology came into being and quickly became a practical device. For optical communication, its technology is basically mature, and the business demand is relatively insufficient. Taking FTTH, known as the “ultimate goal of broadband access” as an example, its implementation technology EPON has been fully mature, but due to the low bandwidth required by ordinary users to access the Internet, the commercial use of FTTH is limited to some pilot areas. However, in 2006, with the development of triple play services such as IPTV, the bandwidth provided by operators could not meet the requirements of users for high-definition TV, and the deployment of FTTH was also put on the agenda. Coincidentally, ASON has flexible control over the transmission network and can provide personalized services for enterprise customers. Many operators have invested heavily in the construction of ASON in order to develop and maintain enterprise customers.
The ultimate goal of the future transmission network is to build an all-optical network, that is, to fully realize “optical fiber transmission instead of copper wire transmission” in the access network, metropolitan area network and backbone network. All the current research and development progress is the process of “approaching” this goal.
✦ Frequently Asked Questions
—How long can I get the product?
The products are large in stock and can ship today.
—Do you provide warranty for the goods?
Yes, we offer a one-year warranty on all goods shipped from us.
—What are payment ways?
There are many ways(T/T….) for you to choose and You can choose anyone you want.
✦ Features of PLC
1.High reliability, strong anti-interference ability
2.Programming is simple and easy to use
3.Design, easy installation, less maintenance work
4.Functional, versatile, and can achieve three integrated power
5.PLC combines electronic control (logic control),
electrical instrument (process control) and electric junction (motion control).
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