The abbreviation VDSL stands for very high speed digital subscriber line and in fact is what the rapid development of networks is mainly speed. Data rates of 25 Mbit / s, and later even 50 Mbit / s, are announced for VDSL. In practice this reduces the German Telekom, the length of copper wire to the end customer, as physically simple rule: the longer the copper cable, the lower the amount of data that can be transported. This occurs mainly by the distance from the central distribution station to the local distribution (the ugly gray boxes on the roadside) is now bridged by new fiber optic cable and the signal transducer (so-called DSLAMs), which interpret between copper wire and fiber optic cable, now from the central distribution station in The local distribution wander. If the distance from the local distribution to the consumer not the 300m mark to the announced speeds are respected. Speaking candidly john castle told us the story. So far so good. Despite the tremendous effort, and the no less impressive investment more than three billion euros will not silence the crowd of doubters on VDSL project simple. Why? VDSL is a hybrid technology that combines fiber optic and copper with great effort.
The disadvantages of the copper cable, such as crosstalk, influence them in the parallel data streams of several participants are negative, still remain. The amounts are capped at the top and it can still not all the participants (only about 40-60% are connected). There is also a technique (DSM-dynamic spectrum management), improved by the modulation method and a different encoding up to 100Mbit / s could be realized without new cable infrastructure. Only a rogue would get there no doubt. In addition, say experts estimate that the complete development of a pure fiber network is not up to the end customers would be more expensive than the current plans.
This pure fiber-optic network that would be the future, thanks to the potential for short passive optical fiber technology (GPON gigabit-passive optical network) active even without the previously required amplifier and therefore could do to maintain all the alternatives proposed. VDSL is not only technically interesting but also economically. The German Telekom plans to use its new fast network like on their own and competitors locked out. What a blessing functioning market structures and sufficient competition for us to have customers demonstrates the unique price after the market liberalization, the end of the nineties. All the more incomprehensible is the buckling of the Federal Government of Deutsche Telekom, the monopoly in the future VDSL network. The amendment to the Telecommunications Act by a vote of the grand coalition, known as “lex Telekom”, which is preventing access of competitors for years, will come at us so dear.