Discussion on the Application of Optical Access Network Technology

The optical access network technology is still a popular access technology. So I have studied the characteristics and practical application of the optical access network technology. I would like to share with you here, I hope it will be useful to you. According to Forrester Research, half of enterprise users intend to double their bandwidth in the next two years. So where does this bandwidth come from? Currently, enterprise users only have a few options: bandwidth-limited T1 lines or expensive and not popular T3 lines.

Optical fiber is the answer to this problem. According to Vertical Systems Group, currently, only 3% of enterprises are connected to fiber optic networks, and 76% of enterprises are 1.6 kilometers away from fiber optic networks. However, until now, the only way to connect fiber optics directly to an enterprise is to use expensive SONET devices, so they cannot be connected to each building.

An emerging network technology-optical access network technology (OAN) is a practical technology to eliminate the bottleneck between the increasing capacity of the LAN and the wide area network. OAN enables service providers to submit fiber-based broadband services to enterprises of all sizes. OAN based on passive optical network, PON) does not need to install expensive active electronic devices on the external site, so that service providers can provide enterprises with the required bandwidth in a cost-effective manner.

OAN consists of three parts: an optical access switch (OAS) installed in the Central Bureau of the service provider, and an intelligent optical terminal (IOT) installed on the client ); and a PON installed between the two devices. In the PON environment, the only external device required in addition to optical fiber lines is a cost of several hundred US dollars.) Source-less Optical splitter and coupler. The two devices can separate or merge transmission streams like the T-connector on the pipe: the optical access network technology can transmit half of the light to one direction, and the other half to the other. The coupler/splitter can be purchased from many optical component manufacturers.

OAS is an IP/ATM switch that collects hundreds of IOT transmission streams distributed downstream on PON, OAS that configures the standard interface provides a valid entry point for entering the WAN. The pizza box-sized IOT is a low-cost client device that supports broadband voice and data services.

In the access network, a specification cannot meet all the needs, which is currently the case for T-1, T-3, and digital user lines. OAN allows enterprise users to enjoy flexible bandwidth of various specifications: 1 Mbps to Mbps and dedicated wavelength bandwidth. In addition, OAN allows enterprise users to quickly improve their bandwidth conditions to support their changes in bandwidth demand. For example, a retailer can change its service level from 3 m to 10 Mbps during the holiday season.

Since few companies are preparing to use services that occupy the entire wavelength, it is very important for OAN applications to divide the wavelength into smaller wavelengths. Just as optical access network technology can increase the wavelength on the optical fiber line, the wavelength division capability increases the number of endpoints that a wavelength can provide. With this feature, service providers do not need to invest heavily when submitting wavelengths to each customer. Another key attribute of OAN is the use of embedded optical fiber infrastructure. By using passive optical fiber splitter and Coupler in the external station, service providers only need to deploy a small number of optical fiber lines near an office area, and then the office area will radiate out to provide services for most enterprise users.

The submission of high-capacity broadband Fiber Infrastructure will eventually eliminate the last mile obstacle in public networks. It is very similar to the famous chicken or egg. enterprise users can access the Internet without restriction, in the end, we will enjoy the next-generation services such as virtual private networks and enterprise-to-enterprise e-commerce and application outsourcing.

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