Questions about installing ADSL

The Internet is changing the way we work, relax, and live. With the rapid development of computer and communication technologies, the Internet is not only a pure network, but also can provide us with comprehensive access to data and multimedia services. We can enjoy a large number of visual, audio, and new interactive 3D applications from the Internet.
However, these operations must be performed on high-speed networks. As a result, broadband access is an inevitable trend. As more and more operators provide broadband network access services, many people have many questions about installing the broadband network. The following are some of the questions:
1. What is ADSL access?
ADSLAsymetric Digital Subscriber Loop) technology is an asymmetric Digital user Loop technology that uses ordinary telephone lines as transmission media to provide asymmetric upstream and downstream transmission rate bandwidth ), the uplink speed can reach 640 Kbps from the user to the network, and the maximum downlink speed from the network to the user can reach 8 Mbps. Due to the asymmetry of data transmission, it is particularly suitable for personal home users and small-sized enterprise/group users to access the Internet.
2. Do I have to charge a telephone fee when I use ADSL to browse the Internet?
No. Because the INTERNET access through ADSL is not connected to the INTERNET through the telephone exchange network, but occupies resources of the PSTN line and broadband network, you need to pay the ADSL monthly rental fee.

3. What are the advantages of ADSL access compared with ordinary dial Modem and N-ISDN?

1) compared with the ordinary dial Modem up to 56 K rate, and N-ISDN K rate, ADSL speed advantage is self-evident.
2) What makes ADSL more attractive compared with common dial-up Modem or ISDN is that it transmits data and voice signals separately on the same copper line, and the data signals are not transmitted through the telephone switch equipment, this reduces the load on the telephone switch, which means no additional telephone fee is required to use ADSL for Internet access.
4. What is the Internet speed comparison between ADSL and cable modem?

ADSL uses a star topology to select a network topology, providing a fixed and exclusive bandwidth for each user, and ensuring the security of data transmission, the cable TV video network structure is bus-type, and the promised 10 M or even 30 M channel bandwidth is shared by a group of users. Once the number of users increases, the bandwidth allocated by each user decreases sharply, and the critical defect of the shared network topology is its security. data transmission is based on the broadcast mechanism, each user in the same channel can receive data packets in the channel.

5. Do users need to apply for additional telephone lines to install ADSL?
To install ADSL, A multiplexing device is loaded on the original telephone line, so you do not have to add a telephone line.
6. How can I apply for ADSL without a straight line phone?
First, apply for a new line call at your telephone office and then apply for the ADSL service.
7. My location is far away from the IDC of the Telecommunications Bureau. Can I install ADSL?

Because ADSL has high requirements on the line, the distance between the user end and the Telecommunications Bureau should be less than 3-5 kilometers. In order to ensure the communication quality, the distance should be less than 3KM.
8. Will ADSL be dropped like a 56 K Modem?

When any connected device fails, ADSL will also be dropped, but as long as the line quality is good, the chance of disconnection is still very small.
9. Is it difficult to install ADSL? Will it affect the original phone number?
There is no need to change the telephone line for installing ADSL. Therefore, it will be slightly affected only during installation and debugging.

10. Will I change my phone number if I change my ADSL number on my current phone?
Generally, this will not change. Because the ADSL signal is completely independent of the phone signal and does not affect each other, the ISDN is completely different. There is an ISDN signal in the line. When the telephone and data are together, the ISDN must change the number, which is also a small advantage of ADSL.
11. Do I need to dial data with ADSL?
There are two ways to connect ADSL to the INTERNET: Virtual dialing and leased line access. Users using virtual dial-up methods use dial-up programs similar to MODEM and ISDN, which is similar to the original method in terms of usage habits. Users who use leased line access can access the INTERNET as long as they start up. The specific method is determined by the ADSL service provider.
12. What is virtual dialing?

The so-called virtual dialing refers to the same user name and password as the original MODEM and ISDN access when using ADSL to access the INTERNET ), however, the ADSL connection is not a specific access number such as 163 or 169, but the IP address of the ADSL access of the Virtual Private Network VPN.

13. Will ADSL Access ISP be busy?
No. ADSL is only fast or slow, and access will not be busy.

14. What benefits does ADSL users enjoy in addition to providing Internet access?
High rate is the biggest feature of ADSL, so some network applications that can only be achieved at high rate appear more than enough in ADSL's view, such as 1.5 M Mpeg-1 or 4 M MPEG-2 of video on demand can be in ADSL under the premise of enjoy, a 4 M byte MP3 file only needs 1 minute and more time can download completed! At the same time, due to the high bandwidth and security of ADSL, it is also an ideal choice for LAN interconnection and remote access.
15. What devices do users need to add when installing ADSL?
The user needs to purchase an ADSL client device that includes the adsl modem and Splitter). If the user's computer does not have a nic, you generally need to bring your own Ethernet Card ordinary 10/100 M Ethernet card, the market price is only dozens of Yuan, the NIC must have an RJ45 interface ).
16. How do I install an extension number or other devices on my ADSL line?
The ADSL filter splitter should be connected to the home end of the telephone line, and the telephone port separated by the splitter should be used to expand the telephone extension. Of course, it can also be connected to the extension port theoretically, however, such a telephone line is integrated into other electronic devices (telephones) between the home end and the separator, which may interfere with the communication of ADSL, because ADSL has high requirements on the line quality, it may affect the normal operation of ADSL, so it is generally necessary to install the extension after the separator line.
17. I want to install ADSL, but I am worried that the telephone quality will decrease. In addition, does a call result in a decrease in the Internet access rate?

ADSL uses the frequency division multiplexing technology to separate voice and data. voice and data run on different channels, so they do not interfere with each other. Even if you use a phone call to access the Internet, the speed of the Internet access will not decrease, and the quality of the call will decline.
18. Can I use a dial-up Modem as an ADSL Modem?
No. The working mechanism and network structure of the adsl Modem are different from the current dial-up Modem, and the interface to the PC is 10BaseT Ethernet interface or USB Interface) instead of RS232 serial port or parallel port.

19. Can users purchase ADSL client devices on their own in the market?

At present, there are few sellers selling adsl modem in the market, because the client devices and local devices of different manufacturers may have compatibility problems. In order to improve the activation rate and communication quality, the access products provided by the Telecom Department are basically used, and the Telecom Department sells the products to users at the cost.
20. Which vendor's ADSL devices are currently used?
Currently, Alibaba Cloud products include Alcatel, Ericsson, Huawei, ZTE, And Hewitt. For specific device types in your region, contact the local telecommunications Bureau.
21. What are the forms of ADSL client devices?
Currently, common adsl modem modes include: 1. built-in PCI interface card; 2. Ethernet interface; 3. USB interface. The built-in PCI interface card is cheaper.
22. Does ADSL support LAN access?
Yes. There are three methods:
1) set the host directly connected to the Internet through ADSL as a proxy server, and then the client on the local LAN accesses external information resources through the proxy server, the advantage of this method is that you need to apply for an account or an IP address, and the local client can use the reserved IP address;
2) A leased line is used to apply for one IP address from the telephone Bureau for each computer on the LAN. The advantage of this method is that you do not need to set up a dedicated proxy service gateway. Due to the shortage of IP Address Resources, it is difficult to allocate enough IP addresses. In addition, the use of leased lines means that users are subject to higher monthly rental fees;
3) connect a vro behind ADSL and apply for an IP address from the telephone Bureau for the local area network. After the telephone Bureau sets a route for the IP address, you can access the Internet, the advantage of this method is that the number of LAN computers is unlimited, but you need to add a vro and some high-end ADSL Modem have the router function ).