VDSL (very-high-bit-rate digital subscriber loop) is a very high-speed digital subscriber loop. In short, vdsl is a fast version of ADSL. Using VDSL, the maximum download rate in a short distance can reach 55Mbps, and the upload rate can reach 19.2Mbps, or even higher.
technical features of VDSL:
1. High-speed transmission
The maximum download rate in a short distance can reach 55Mbps, and the upload rate can reach 19.2Mbps, or even higher. At present, it can provide 1Mbps uplink and downlink symmetric rates.
2, surfing the Internet and making phone calls do not interfere with each other
VDSL data signals and telephone audio signals are modulated in their respective frequency bands according to the principle of frequency division multiplexing without interference. You can make or answer the phone while surfing the Internet, which avoids the trouble of not using the phone when dialing the Internet.
3. Exclusive bandwidth, safety and reliability
VDSL uses China Telecom to penetrate into the telephone network of thousands of households, and has formed a star-shaped network topology. The backbone network adopts the optical fiber transmission of China Telecom all over the city, so you can enjoy 1M/s bandwidth exclusively, and the information transmission is fast, reliable and safe.
4. Quick and convenient installation
To install VDSL on the existing telephone line, just install a VDSL modem on the user side. Most importantly, you don't have to rewire or change the line for broadband internet access.
5. Affordable
The Internet access fee of VDSL service is composed of basic monthly fee and information fee, and there is no need to pay the Internet communication fee (that is, telephone fee)
3. Business functions of VDSL
1. High-speed data access
Users can quickly browse information on various Internet, have online conversations and send and receive emails through VDSL broadband access.
2. Video-on-demand
is especially suitable for users' demand for music, movies and interactive games, and can be controlled at will according to users' individual needs.
3. Home Office
To realize home office, customers only need high-speed access to check the information you need in their enterprise (unit) information base online, and even talk face to face with colleagues to complete their work tasks.
4. Distance education, telemedicine, etc.
With broadband access, customers can get multimedia information with pictures and texts on the Internet, or communicate and discuss with teachers and doctors at will.
4. VDSL question and answer:
1. which equipment should I prepare to apply for VDSL service? Hardware requirements: computer: PC with PENTIUM or above
software requirements: it is recommended to use MICROSOFT WINDOWS98 or WINDOWS2 or WINDOWS ME operating system
VDSL terminal equipment: VDSL MODEM 1M or 1M/1M adaptive Ethernet card
2. Do users need to apply for another telephone line to install VDSL?
installing VDSL is to load a multiplexing device on the original telephone line, so users don't need to add another telephone line.
3. To apply for VDSL service, do I need to change my original phone number?
no need.
4. Is it troublesome to install VDSL, and will it affect the original telephone?
there is no need to change the telephone line when installing ADSL, which will not affect the normal call of the telephone in principle.
5. VDSL virtual dialing, how to dial?
the so-called virtual dialing means that when accessing the INTERNET with VDSL, you also need to enter the user name and password (the same as the original MODEM and ISDN access), but the VDSL connection is not the specific access number such as 163 or 169, but the IP address accessed by VDSL of the so-called virtual private network VPN.
6. Can I visit more websites by installing VDSL?
with VDSL access, you can visit any website you want in the world. This is the same as ordinary 56K telephone dial-up Internet access.
7. I have a 163/169 dial-up account. Can I use it on VDSL?
no, VDSL's virtual dial-up account needs to be reapplied.
8. Besides surfing the Internet, what benefits can VDSL enjoy?
high speed is the biggest feature of VDSL, so some network applications that can only be realized at high speed are more than enough in VDSL's view. For example, video-on-demand of 1.5M Mpeg-1 or 4M MPEG-2 can only be enjoyed on the premise of broadband, and a 4Mbyte MP3 file can be downloaded in less than one second.
9. when browsing the internet with VDSL, do you need to charge for the phone?
no need. Because accessing the INTERNET through VDSL does not access the Internet through telephone switching network, but it takes up line resources and broadband network resources, so only ADSL Internet access information fee is required.
1. What is the difference between VDSL and ADSL and FTTx+LAN?
VDSL can be regarded as a fast version of ADSL, and it is a promising access method just like FTTx+LAN. Their common point in application is that they can carry out integrated communication of voice, data and images, and realize high-speed internet access and other applications. The downlink rate of VDSL can reach up to 55Mbps. The voice part of VDSL takes the traditional telephone switching network, while the data part is connected to the broadband ATM platform or broadband IP MAN. Using VDSL service has the advantages of safety, stability, rapidity and convenience, and users can enjoy the bandwidth exclusively, without damaging the home decoration.
11. Can the dial-up Modem I am using now be used as the Modem of VDSL?
No, the Modem of VDSL is different from the current dial-up Modem, with different modulation mode and network structure, and the interface to PC is 1BaseT Ethernet interface instead of RS232 serial port or parallel port.
12. I want to install VDSL, but I'm worried that the quality of the phone will drop. In addition, will making phone calls lead to a decrease in Internet access rate?
VDSL uses frequency division multiplexing technology to separate voice from data. Voice and data run on different paths, so they do not interfere with each other. Even if you surf the internet while talking on the phone, there will be no decline in internet access rate and call quality.
13. Factors that may affect the performance of VDSL
The performance of VDSL may be affected by the long distance between users and the computer room of telecom company VDSL or the poor quality of telephone lines, as well as line interference caused by other reasons, such as too many telephone sets received by users at home. In addition, the network card used by users is also related to the stability of PC performance. Therefore, we suggest that if users use ADSL service, there should not be too many telephone sets at home, and at the same time choose a better quality network card to ensure the performance of VDSL.