ADSL or optical fiber? How small and medium enterprises access the Internet

There are many broadband Internet access methods. For enterprises, ADSL and optical fiber are currently popular. The full name of ADSL is an asymmetric digital user line. It is a popular broadband Internet access method and a technology that provides broadband data services through copper telephone lines. Optical fiber is short for optical fiber. Optical Fiber Communication is a communication method that uses optical fiber as the carrier and optical fiber as the transmission media. For small enterprises, how to select the most suitable method for accessing the Internet has become a problem that everyone must solve. To solve this problem, let's take a simple analysis.

Currently, the ADSL bandwidth commonly used by small enterprises is generally divided into 2 M, 3 M, 5 M, 8 M, and the uplink speed is up to K. Because of the low cost, it is one of the many Internet access methods selected by many small enterprises and individuals. Small-sized enterprise users with low application and bandwidth requirements are suitable for network broadband services that are relatively cost-effective. Fiber-optic enterprises generally have high requirements on network quality, bandwidth requirements, latency, public IP addresses, and security and stability. Compared with ADSL, the maximum advantage of optical fiber access is that the available bandwidth is high, and the optical fiber can overcome some restrictions that copper cables cannot overcome, such as low loss and low frequency bandwidth. This removes the limitation of small copper wire diameter. Optical fiber access also features good transmission quality, long transmission distance, strong anti-interference ability, high network reliability, and saving pipeline resources, but is expensive.

The key to selection, the content determines the form

I believe that for small enterprises, the key to choosing ADSL Broadband or fiber-optic Internet access lies in the use purpose of enterprise users, the needs of users, and the content decides the form! Therefore, if your enterprise's Internet business is only applicable to Internet access, remote LAN access, remote learning, remote financial services, home banking, network information, news services, online libraries, and remote electronic shopping, VOD, on-demand movies/TV programs) and so on.

However, with the development of economy and foreign trade, many small companies also have applications such as servers, VPNs, and video conferencing, And ADSL bandwidth is no longer able to cope with these needs. The disadvantage of ADSL itself is that the uplink bandwidth is only 1/6 of the downstream bandwidth, or even lower. However, the bandwidth required for video conferencing and other services only needs to open several windows at the same time to fully occupy the upstream bandwidth of ADSL, seriously slowing down the network speed of the entire network. However, optical fiber is different. optical fiber is a symmetric broadband product with upstream and downstream data. It can also provide 2-M bandwidth options. It is particularly suitable for industries with frequent data exchanges and high bandwidth requirements. With 60 PC computing units for a small enterprise, 10 m optical fiber can carry all of these workstations to Open QQ videos without slowing down the speed of the network, and more than enough to hold video conferences across the company, this is obviously incomparable to ADSL.

Maybe you said, my company is very small, there are only 15 computers, and there are not many application functions, the 2 m of ADSL is enough. However, we need to know that, in fact, if 15 computers are connected to the Internet, the 2 m network is indeed slow, and such a small company generally does not set up dedicated network management, so who knows if your employees are downloading a large amount of data, chatting with customers, or even watching online TV. If there are three or two employees, the work of other employees is not enough.

Cost problems small enterprises are most concerned about

For ADSL users, the cost mainly includes: the cost of hardware equipment (ADSLModem, Nic and separator), the initial installation fee and the monthly usage fee. The specific charges of each city in China vary slightly according to the promotion policies, but the composition of the charges is basically similar. Taking Guangzhou Telecom as an example, its initial installation users only need to pay the installation and commissioning fee of 100 yuan, and the installation and commissioning fee of 100 yuan is generally sent to the single-port ethernet interface MODEM, if you want a multi-function wireless MODEM, you need 350 RMB ). If you install an ADSL leased line, you need 1000 yuan to send a single-port ethernet interface MODEM ). In addition, you only need to pay 500 RMB per month for a total of RMB per year.

The initial cost of fiber-optic access is relatively high. users need to purchase a pair of optical/electrical conversion devices (referred to as optical cats) during access. The fiber-optic laying process is time-consuming and cannot be withdrawn once the cost is invested. According to statistics, the cost of Fiber-to-the-home includes equipment cost and construction cost. The average installation cost per line is about-RMB. In addition, the cost is relatively high, and the payment is generally based on monthly rent. At present, small enterprises mainly rent 2 M-10 M, the cheapest is 2 M for 18 thousand/year, 4 M for 25 thousand/year, 10 M for 30 thousand/year, of course, Telecom is even higher. Obviously, such a high cost is unacceptable for most small enterprises. Therefore, in terms of cost, fiber-optic access is obviously connected to ADSL. low fees and low initial investment are an advantage of ADSL access.

Stability also needs to be considered during peak hours

Through the above introduction, we know that through ADSL Internet access, high performance and low price. Rich user resources and copper cable resources connected to users are their advantages. You only need to invest a certain amount of money to use ADSL to provide broadband access services for users, it is a good way for small enterprises to build broadband access networks. However, the copper access network is limited by some insurmountable factors, which makes the information highway a "bottleneck" in the user access section ". In this case, people naturally think of optical fiber. Optical Fiber can overcome some of the limits that copper cables cannot overcome. Its Low Loss and bandwidth lift the limitation of small diameter of copper cable.

In addition, with the expansion and expansion of the city, the number of users of the ADSL system is increasing, and personal and Internet cafe users occupy bandwidth in the data room, during peak hours, the network speed is unstable or broken due to interference of long-distance transmission. This is a heart disease for enterprises that need the network at all times, if you miss the customer's information or interrupt Communication, your loss will not be compensated by the cost of 10 thousands or 20 thousands RMB. The optical fiber is directly connected to the telecom data center through the client through the beam, which is not affected by external electromagnetic and electrical interference, and does not emit external signals. Therefore, the anti-interference capability is very strong, ensuring the signal transmission quality.

In addition, ADSL transmits data in voice transmission mode, with a large number of peripheral transmission media and some devices, such as sub-user lines, jumper boxes, wiring lines, trunk lines, ports, and bandwidth access server BRAS) and the ATM network and ADSL transmission system. If the line is seriously affected, it brings various risks to data transmission and obstacle detection and repair, seriously affecting user usage and fault recovery. The optical fiber equipment is simplified and clear, and only the user-side optical Modem, optical fiber cable, local optical Modem, and layer-3 Switch are involved. This makes the Optical Fiber Equipment unavailable due to intermediate equipment faults.

Summary

In summary, ADSL is affordable, cost-effective, and the speed is acceptable. Although many Internet users are slow, it will be affected by the bandwidth of the building, however, it is still suitable for simple applications such as office surfing, Webpage Browsing, and email for small enterprises. Generally, it is limited to less than 30 computers, which is a cost-effective choice for small enterprises with no requirements on the speed. The optical fiber Internet access adopts physical lines, and the uplink and downlink are symmetric. The dedicated Optical Fiber Internet access path is safe, stable, fast, and with low latency, suitable for high-end e-commerce applications such as servers, ERP, video conferencing, and VOIP, and suitable for enterprises with many application layers, such as VPN, ERP, video conferencing, and servers, more than 50 customers with high-speed and stable needs can be provided.

1. Japanese household optical fiber broadband users are more mainstream than DSL
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