VDSLVDSL2

VDSL2, or Very-high-bit-rate Digital Subscriber Line 2, is a telecommunications technology used for high-speed internet access over existing copper telephone lines. It is an advanced form of DSL that significantly increases the bandwidth compared to earlier DSL technologies like ADSL. VDSL2 operates over frequencies ranging from 100 kHz up to 30 MHz, enabling much higher data transfer rates.

The performance of VDSL2 is highly dependent on the distance from the telephone exchange or local cabinet. Shorter loop lengths, typically under 1 kilometer, allow for the highest speeds, which can approach or even exceed 100 Mbps in both download and upload directions. As the distance increases, the achievable speeds decrease significantly due to signal degradation.

VDSL2 is often deployed in a "vectoring" configuration, which is a noise-cancellation technique. Vectoring reduces crosstalk between adjacent copper pairs, allowing VDSL2 to maintain higher speeds over longer distances than non-vectored VDSL2. This technology is a key component in fiber-to-the-cabinet (FTTC) and fiber-to-the-building (FTTB) deployments, where fiber optic cable is run to a local cabinet or building, and then VDSL2 is used to connect individual premises.

VDSL2 offers a cost-effective way to deliver high-speed broadband services, especially in areas where deploying full fiber optic infrastructure to every home might be prohibitively expensive. It is a widely adopted standard for next-generation broadband in many countries.