VDSL (Very-high-bit-rate Digital Subscriber loop) is a very high speed digital subscriber loop, simply put, VDSL is a faster version of ADSL. With VDSL, the maximum downlink rate over a short distance can be up to 55Mbps, and the uplink rate can be up to 19.2Mbps or even higher.
Second, VDSL technology features:
1, high-speed transmission
The maximum downlink rate within a short distance can be up to 55Mbps, and the uplink rate can be up to 19.2Mbps, or even higher. Currently 10Mbps uplink and downlink symmetrical rate is available.
2. Surfing the Internet and making phone calls without interfering with each other
The VDSL data signals and telephone audio signals are modulated in their respective frequency bands by the principle of Frequency Division Multiplexing (FDM) without interfering with each other. This allows you to make and receive phone calls while surfing the web, avoiding the hassle of not being able to use the phone when dialing for Internet access.
3, exclusive bandwidth, safe and reliable
VDSL using China Telecom's deep into the tens of thousands of households of the telephone network, the innate formation of the star structure of the network topology, the backbone network using China Telecom throughout the city of the country's fiber optic transmission, you can enjoy exclusive 10M / s bandwidth, fast, reliable and secure information transfer.
4, fast and easy to install
Installation of VDSL on the existing telephone line, you only need to install a VDSL modem on the user's side, and most importantly, you do not need to re-lay or change the line for broadband Internet access.
5. Affordable price
VDSL service Internet tariffs are composed of basic monthly fees + information fees, and you do not need to pay for Internet communication fees (i.e., telephone charges)
Three, VDSL's business functions
1. High-speed data access
Users can quickly browse a variety of interconnected network information through VDSL broadband access
Users can quickly browse through a variety of interconnected network information, talk online, send and receive e-mail, and also use VDSL as an Internet connection.
2. Video on Demand (VOD)
Specially suitable for the user's music, video and interactive games on demand, but also according to the user's personalized needs for arbitrary control.
3. Home Office
To realize the home office, customers only need high-speed access to the high-speed access mode, in the online access to their own enterprises (units) in the information base of the information you need, and even face-to-face and colleagues to talk to, to complete the work tasks.
4. Distance learning, telemedicine, and more.
Through broadband access, customers can get multimedia information with illustrations and text on the Internet, or communicate and discuss with teachers and doctors at will.
Four, VDSL Q & A:
1, apply for VDSL service, need to prepare which this equipment? Hardware Requirements: Computer: PENTIUM or above PC configuration
Software Requirements: It is recommended to use MICROSOFT WINDOWS98 or WINDOWS2000 or WINDOWS ME operating system
VDSL Terminal Equipment: VDSL MODEM 10M or 10M/100M Adaptive Ethernet card
2, the installation of VDSL Q&A:
4, VDSL Q&A:
1, to apply for VDSL services, which need to prepare this equipment? p>
2, the installation of VDSL, users need to apply for a separate telephone line?
Installing VDSL is loading a multiplexing device on the existing telephone line, so users do not need to add another telephone line.
3. If I 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?
The installation of ADSL does not require any changes to the telephone line, and in principle, it will not affect normal telephone calls.
5, VDSL virtual dialing, how to dial?
The so-called virtual dialing refers to the use of VDSL access to the INTERNET also need to enter the user name and password (the same as the original MODEM and ISDN access), but VDSL is not connected to a specific access number such as 163 or 169, but the so-called virtual private network VPN VDSL access to the IP address.
6. Can I access more websites by installing VDSL?
With VDSL access you can access any website you want in the world. This is the same as regular 56K telephone dial-up access.
7. I have a 163/169 dial-up account, can I use it for VDSL?
No, you need to re-apply for a virtual dial-up account for VDSL.
8. What are the benefits of VDSL besides Internet access?
High speed is the most important feature of VDSL, so some of the network applications that can only be realized at high speeds are more than enough for VDSL, such as 1.5M Mpeg-1 or 4M MPEG-2 video on demand can only be enjoyed under the premise of broadband, and a 4M byte MP3 file can be downloaded in less than 1 second.
9. Do I get charged for the call when I use VDSL to browse the Internet?
No, there is no charge. Because accessing the Internet through VDSL does not go through the telephone exchange network to access the INTERNET, but it takes up line resources and broadband network resources, so you only need to pay the ADSL Internet access information fee.
10. What is the difference between VDSL and ADSL and FTTx+LAN?
VDSL can be regarded as the fast version of ADSL, and FTTx+LAN are the same as the current more promising means of access, the two in the application of the same point is to be able to carry out the voice, data, image of the integrated communication, high-speed Internet access and other applications.
The downlink rate of VDSL can reach a maximum of 55Mbps, the voice portion of the traditional telephone exchange network, while the data portion of the access to the traditional telephone exchange network, while the data portion of the access to the network. VDSL downlink rate can reach up to 55Mbps, and its voice portion is connected to traditional telephone switching network, while the data portion is connected to broadband ATM platform or broadband IP metropolitan area network. The use of VDSL service has the advantages of security, stability, speed and convenience, and the user can enjoy the bandwidth exclusively, and does not damage the home decoration.
11. Can I use my current dial-up modem as a VDSL modem?
No, VDSL Modem is not the same as the current dial-up Modem, the modulation method and network structure are different, and the interface to the PC is a 10BaseT Ethernet interface instead of RS232 serial or parallel port.
12. I want to install VDSL, but I'm worried about the quality of the calls. Also, will making phone calls cause the Internet access rate to drop?
VDSL uses frequency division multiplexing to separate voice and data, with voice and data running on separate paths, so they don't interfere with each other. Even if you make a phone call while surfing the Internet, there is no degradation of the Internet rate and no degradation of the call quality.
13. Factors that may affect the performance of VDSL
The distance between the user and the telecommunication company's VDSL room is too far, or the quality of the telephone line is not good, as well as other reasons for line interference, such as the user's home phone calls to the vice too much, may affect the performance of VDSL. In addition, the performance stability of the network card and PC used by the user is also relevant. Therefore, we recommend that users use ADSL service to avoid excessive telephone subscribers in the home, and to choose a better quality network card to ensure the performance of VDSL.