Advantages and disadvantages of fiber access and ADSL access

The Internet has promoted the further prosperity of the Internet cafe industry. The access methods of various Internet cafes are also different, and the networking schemes are also varied. The current international Internet access solutions include broadband access such as optical fiber, ADSL, satellite broadband access, and narrowband access such as DDN and ISDN.

Among the many Internet access methods, operators of Internet cafes usually choose fiber access or ADSL network access. Fiber access is an ideal access method. However, ADSL network access is currently the network access solution generally chosen by Internet cafe operators. Why do Internet cafe operators make such a choice, instead of ADSL access instead of longing for optical fiber access? Let's analyze the optical fiber network access from the aspects of network performance requirements, access costs and tariff levels, application environment, etc. And the pros and cons of ADSL network access.

From the perspective of network performance requirements of Internet cafes:
Internet cafes have become a huge industry. The types of Internet applications in Internet cafes are very diverse, with higher requirements on network bandwidth, transmission quality and network performance. Network applications must integrate advancedness, multi-services, scalability, and stability, not only to satisfy customers' simultaneous transmission of voice,

The need for video and data, but also support a variety of new business data processing capabilities, high-speed Internet access, large data traffic does not drop, non-stop. The Internet cafe's operating route determines that it must have a high-speed, stable, and secure network system to maintain good development. The worm network technology optical fiber access refers to the use of optical fiber as the transmission medium between the central office and the user. Optical fiber access can be divided into active optical access and passive optical access. The main technology of optical fiber user network is light wave transmission technology. Optical fiber access is an ideal broadband access method, which can solve the problem of broadband Internet access, with fast speed, low obstacle rate, and strong anti-interference. However, due to the limitation of egress bandwidth, if the number of users on the route increases rapidly, the speed of network access will drop sharply, and local dropouts are often encountered.
ADSL is the asymmetric digital subscriber loop technology. It uses the existing pair of telephone copper wires to provide users with a maximum bandwidth of 8M in the downstream (from the Internet to the user end) and 640K in the upstream (from the user end to the Internet). Into technology. ADSL has high bandwidth and stability, so that you can ride on such a wide road without the feeling of traffic jam, and will not drop the line, so that your surfing life is unrestrained and smart. For Internet cafes, due to the large number of nodes in the network and the large amount of data traffic, you can apply for multiple ADSL lines to increase the speed of Internet access. At the same time, it can also improve the stability and reliability of the entire network and play a role in backup.

Optical fiber access is good, fast speed is fast, but as soon as more users come up, it is easy to drop; and ADSL is a unique access method, the access rate is not affected by the number of users online, and relatively stable. I have a friend ’s Internet cafe (60 machines) because they often go offline after switching to optical fiber. It is a local drop, not the entire Internet cafe. Most of the time, one or two computers or a dozen computers are dropped, but other The computer is working properly.
This was not the case when using ADSL before. It is because of this problem that my friend ’s business is inferior to the previous one. I believe this situation will also happen to other Internet cafes. The unique operation mode of Internet cafes determines that Internet cafes must have a high-speed, stable, and secure network system. The speed and stability of network access are issues that must be considered by Internet cafes. ADSL is a bit slower than optical fiber, but it is stable, so ADSL The access method is worthy of the current choice of Internet cafe networking.

From the perspective of the cost and tariff level of access methods:
The initial cost of optical fiber access is relatively high. When accessing, users need to purchase a pair of optical / electric conversion equipment (commonly known as optical cat). The fiber laying process is very time-consuming and once the cost is invested, it cannot be withdrawn. Moreover, the tariff is relatively expensive, and the payment is generally by monthly rent.
ADSL access can be retrofitted directly on the existing telephone line, without the need to modify the signal transmission line, without the need to re-penetrate the wall and punch another cable, you can use the ordinary copper telephone line as the transmission medium, as long as it is equipped with a dedicated Modem High-speed data transmission can be achieved. Moreover, the tariff is relatively low, and there are various forms of payment, which can be paid on a monthly basis or according to the length of use. The main cost at the beginning was ADSL Modem.
The war in the Internet cafe industry is fierce. Everyone is fighting for the site. Economic efficiency is the first question that operators must consider. According to the needs of Internet cafes, choose a practical and feasible networking method for Internet cafes, transform advanced technology into practical and economical products and solutions, and at the same time invest in obtaining reliability and powerful performance, pursuing higher Investment efficiency is a common consensus among Internet cafe operators.
The cost of networking is of course a bottleneck in choosing a networking solution for Internet cafes. Optical fiber access and ADSL access have their own advantages in many aspects. However, in terms of cost, optical fiber access is obviously inferior to ADSL. Cheap tariffs and low initial investment are a strong strength of ADSL access.

From the perspective of the application environment of the access method:
Although fiber-to-the-home (FTTH) is an inevitable direction for the future development of user access networks, due to the high cost of fiber user networks, most access networks will continue to use existing copper wire loops in the next few decades Among many transitional broadband access network technologies, ADSL is still the most promising and competitive technology, and will dominate in the next few years or even more than ten years.
ADSL was originally developed mainly for video-on-demand services. With the development of technology, it has gradually become a more convenient broadband access method. ADSL has rich business functions and broad business prospects.
ADSL is a "pragmatism" broadband access technology. The reason why it is "pragmatism" is because its starting point is to make full use of existing fixed network copper wire resources to achieve a breakthrough in bandwidth bottlenecks. This idea is very important for maintaining the original investment of the telecommunications network, and it makes the network more fully utilized.
The upsurge of ADSL has swept all over the world. The major information industry manufacturers all over the world are devoted to the development of ADSL technology and applications, which has made ADSL technology and its applications develop rapidly. Telecommunication operators in Europe, America, Australia, Japan, South Korea, and Singapore have successfully promoted ADSL services, and formed a worldwide ADSL boom.

to sum up:
After the opening of the broadband network, in the overwhelming advertising, Internet access via ADSL has high performance and low price. The characteristics of the broadband network "speed of light, capacity of the sea" are gaining popularity. Rich user resources and copper cable resources for user access are its advantages. With a certain amount of capital invested, ADSL can provide users with broadband access services, which is a good way to build a broadband access network. the way.
However, the copper wire access network is restricted by some insurmountable factors, which makes the information highway form a "bottleneck" in the user access section. In this case, people naturally think of optical fiber. There is no doubt that optical fiber is the ideal transmission medium for the access network. Optical fiber can overcome some limitations that copper wire cables cannot overcome. The low fiber loss and frequency bandwidth eliminate the limitation of small copper wire network diameter.
In addition, the optical fiber is not subject to electromagnetic interference, which guarantees the quality of signal transmission. Replacing the copper cable with an optical cable can solve the problem of crowding of urban underground communication pipes. As the performance of fiber access continues to improve and prices continue to fall, fiber access will surely become more popular. For all broadband applications, optical fiber access is very promising.

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