ADSL and VDSL are both types of the digital subscriber line technology. VDSL offers higher data rates over short distances of twisted-pair copper telephone lines. Whereas ADSL offers lower data rates over longer data rates over longer distances than VDSL. VDSL has some drawbacks, including the fact that it is expensive and that signal speed degrades as distance increases.
What is ADSL?
As the name implies, asymmetric digital subscriber line bandwidth distribution is not identical resulting in unequal data rates upstream and downstream. The downstream bit rate is usually higher than the upstream bit rate.
What is VDSL?
Very high bitrate digital subscriber line technology is similar to ADSL but with some improvements. For a short distance of up to 4500 feet, it uses a coaxial fiber optic or twisted pair cable. DMT a combination of QAM and FDM is the modulation method used in VD.
VDSL vs ADSL | Difference between VDSL and ADSL:
- VDSL offers a downstream bit rate of 55 Mbps and an upstream bit rate of 2.5. while the ADSL has a maximum downstream bit rate of 55 Mbps and an upstream bit rate of 1 Mbps.
- VDSL reaches up to 4500 feet, while the ADSL technology can cover a greater than VDSL.
- VDSL can support both asymmetric and symmetric data and POT services while the ADSL can only support asymmetric data and POT services.
- VDSL reaches up to 4500 feet, while the ADSL technology can travel farther than VDSL, with ADSL covering 18000 feet.
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