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VDSL, short for Very-high-bit-rate Digital Subscriber Line, is a data transmission technology that enables high-speed internet access over traditional copper telephone lines. VDSL is an evolution of ADSL technology, offering significantly higher download and upload speeds. This technology uses higher frequencies to transmit data, allowing transmission speeds of up to 52 Mbps for download and 16 Mbps for upload, depending on the distance between the user and the telephone exchange.

In everyday life, VDSL is used to provide fast internet connections to homes and offices not covered by fiber optics but equipped with copper telephone lines. For example, a family using VDSL can enjoy fast network services and file downloads without interruptions. Small businesses also benefit from VDSL, as it allows them to manage online activities such as sending large amounts of data, accessing cloud services, and communicating efficiently with customers via email and video calls.

In Switzerland, VDSL technology is widely adopted, especially in areas where fiber optic installation is not yet complete and where CATV technology is not available. Telecommunications providers such as Swisscom, Sunrise, and Salt offer VDSL services as part of their internet connectivity packages, enabling users to access high internet speeds even in rural areas. For instance, Swisscom has significantly invested in upgrading the copper network infrastructure to support VDSL, thus improving access to fast internet for a broad population segment in Switzerland. The availability of VDSL helps reduce the digital divide, ensuring more people can benefit from reliable and fast internet connections.

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