Although there are already VDSL, most American households still use DSL for the Internet access. Thus, they use at most DSL 16,000 – with a download speed of up to 16 Mbit / s. The real speed is often much lower. Especially in the country is in many places only DSL 6000 available – with a maximum of 6 Mbit / s in the downstream.
How VDSL works
But in many cities and conurbations, something is happening: VDSL currently allows up to 50 Mbps for downloads and up to 10 Mbps for uploads. And with Vectoring technology, up to 100 Mbps downstream and up to 40 Mbps upstream are possible.
Hardware for VDSL: Router, Modem & Co
VDSL works similarly to conventional DSL. Both variants use telephone lines for data transmission. From the main lines of the Internet, fiber optic cables pass through many intermediate stations to the local exchange office, which can be recognized by a unique telephone number. From there it goes to the multifunctional boxes. These are usually gray boxes in residential areas, on roads and crossroads. Finally, the "last mile" from the multifunction box follows the budget.
The Turbo: Vectoring
Common DSL and VDSL differ between local exchange offices and multifunctional boxes. Up to now, copper cables have passed from the local exchange office to the multifunctional box, while VDSL now has fiber optic cables. A lot of data can be transmitted via fiber optic cables at the same time - so the speed increases.
VDSL port types
The "last mile" lies between the multifunctional boxes and the household. On this short piece the Internet data are sent over copper cable - both with the conventional DSL as well as with VDSL. The fact that VDSL is completely based on fiber optics is a widespread error. When the copper cables of the "last mile" are replaced by glass fiber cables, the term "fiber optic" is used
For analogue and ISDN telephone connections: In order to be able to make calls at the same time and use the web, the telephone must be disconnected from the Internet signal. This is done by a special hardware: the splitter. For VDSL, a splitter is used, which the providers make available. Traditional DSL splitter can not be used with VDSL.
The DSL modem is connected to the splitter. For VDSL, it must be a special VDSL modem, normal DSL modems do not work. The VDSL modem provides the correct data transmission by converting received and transmitted signals. It is usually part of a router.
The router distributes the Internet signal so that it can use multiple devices at the same time, such as notebook, tablet and smartphone. If it is a wireless router, the signal is distributed wirelessly.
All VDSL providers provide customers with special VDSL routers: free of charge, as lending or purchasing equipment. At Congstar you can for example the AVM Fritz! Box 7360 for 19.99 euros to buy, if one decides for a contract over 24 months. Vodafone is the only VDSL provider to force its customers to use certain modems with routers: the Easybox 804 for the analogue or the Easybox 904 xDSL for the ISDN connection. All other vendors leave free choice with VDSL modem and router.
The racing car VDSL creates download rates of up to 50 Mbit / s and uploads with up to 10 Mbit / s. Its fuel line is the newly laid fiber-optic cable between multifunctional boxes and household. The turbo ignites the vectoring. With this technology, the VDSL speed can be increased to up to 100 Mbps downstream and up to 40 Mbps upstream.
Vectoring solves a problem of "last mile". Neighboring cable strings in a copper cable frequently interfere with one another, which means that the speed is impaired. Experts call this effect "crosstalk". Vectoring reduces interference by crosstalk. More specifically, a special coding of the VDSL signal ensures that adjacent transmission lines in the "last mile" copper cable have less influence. Vectoring technology is being incorporated into more and more multifunctional boxes.
For the VDSL customer, Vectoring offers several advantages. It only needs a router that supports Vectoring: all providers with vectoring tariffs offer appropriate devices. On the other hand, constructional measures do not apply in the house or in the home. Neither a new telephone box nor a new splitter is necessary - the VDSL splitter is enough.
The conversion to Internet telephony is accompanied by the VDSL network expansion of Deutsche Telekom and the provision of multifunctional boxes with vectoring technology. In the case of IP telephony, telephone calls are transmitted over the Internet. VDSL and Vectoring offer the broad bandwidths of Internet and IP telephony in the best quality at the same time. This means that the copper cable of the "last mile" is exclusively available for the Internet with the full IP connection of Deutsche Telekom, the frequency separation by the splitter is no longer necessary.
VDSL providers in comparison
New customers of the Deutsche Telekom, the VDSL order and for which immediately a VDSL connection is available, always get the IP full connection. DSL customers who switch to VDSL do not necessarily get an IP connection. Existing connections are usually changed in the course of the conversion of multifunctional boxes. From 2017, Deutsche Telekom will only offer IP connections.
Except Deutsche Telekom and Primacall, all other VDSL providers offer conventional telephone connections. At 1 & 1, Congstar, M-Net, O2 and Vodafone, new customers and existing customers switching to VDSL receive an analogue full-line connection. Optionally, the providers provide a full ISDN connection, which costs slightly more. The ISDN option is only worthwhile if many ISDN devices are already available and are to be used.
Is VDSL worth it?
In the IP-based connection of Deutsche Telekom, ISDN devices work when they are connected to an adapter. This adapter costs around 70 euros. Existing analogue telephones and faxes can be used not only at the analogue full connections of 1 & 1, Congstar, M-Net, O2 and Vodafone, but also with the IP-based connections of Deutsche Telekom and Primacall
Download: VDSL tariffs
Status of the table: 18.3.2015 * Deutsche Telekom: an additional 10% discount on the monthly basic price for the first 12 months of the running time, one-time voucher of 120.00 € for an online service order for the router Speedport W 724V * * M-net: Upstream 5 Mbit / s (Surf & Fon-Flat 50) or 10 Mbit / s (Surf & Fon-Flat 100), 50,00 € exchange bonus for new customers with online order *** o2: 50,00 € "Welcome bonus" at 24 months of contract period **** Vodafone: currently one-time "online start-up credit" of € 50.00 as well as another € 50.00 "exchange bonus" for new customers from another supplier Vodafone (does not apply to cable the United States)
Conclusion
Anyone who occasionally surf the web and retrieve a few e-mails does not need a VDSL. A conventional DSL connection suffices. An average web page with around one MByte data volume is fully loaded even with DSL 6000 after a copious half second. With VDSL 50 it takes theoretically only 0.02 seconds, with VDSL 100 0.01 seconds. The difference is low.
Linktipp: DSL speed test from connect
It looks a bit different for large file downloads. For a GByte data one needs with DSL 6000 about two and a half minutes. With standard VDSL it is about 20 seconds, with Vectoring about ten seconds. All these are, however, only theoretical values. The maximum speeds are hardly achieved in practice - the same applies to conventional DSL like VDSL.
The real speeds depend on many factors. Decisive is, for example, the distance between the multifunctional box and the household and the number of connected households in a multifunction box
Really worthwhile is VDSL for applications, where large amounts of data between the user and the Internet back and forth. Video and music streaming, online games and TV reception via the Internet make VDSL noticeable. IPTV is the top application for VDSL, and in particular HD television over the Internet becomes a pleasure. No wonder that 1 & 1, the Deutsche Telekom and Vodafone their VDSL offer with IPTV couple.
The TV package "1 & 1 Digital TV provided by Telekom" from 1 & 1 is based on the "Entertain" offer of the Deutsche Telekom and is like this to a few points, but costs only about half. Bids will be about 100 digital TV stations, of which a quarter in HD quality. With the telecom offer "Entertain Premium" for 14.95 euros per month send half of the 100 stations in HD. Vodafone offers over 80 digital TV channels, of which about one third in HD.
Good, better, VDSL A VDSL connection is ideal for many households. It can be carried out without any modification work. VDSL is somewhat less expensive than most cable network connections and fiber optic Internet. These alternatives are even faster, but the fewest users will take advantage of the extra speed. VDSL is worthwhile for IPTV in HD, online games and great downloads.
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