What is VDSL Technology and how is it different from DSL
We all know that DSL refers to digital subscriber line and it’s a way to access the Internet using copper telephone lines. So, what does the V stand for in VDSL? Simply put, the V stands for Very High Bit Rate digital subscriber line.
How are DSL and VDSL the same?
- Copper wire transmits data to and from the service subscriber’s location
- Data speed (bandwidth) depends on the length of the copper from the provider’s network equipment or as we refer to it at OTELCO, wire center, to your home; shorter distances deliver faster speeds
How do they differ?
- DSL can provide a maximum bandwidth of about 25 Mbps within 1,000 feet of your ISP’s network equipment; the bandwidth diminishes as the distance to the equipment increases and if that distance (also known as loop length) is more than 18,000’ Internet access over the copper cannot be achieved.
- VDSL works for up to 4,500 feet from network equipment with a top speed of around 75 Mbps closest to the equipment that decreases to about 25 Mbps at the full 4,500’. Beyond 4,500’ the VDSL signal diminishes at a steep decline.
|Distance from the Wire Center||Achievable VDSL Bandwidth|
|Up to 1,000′||51 Mbps to 75 Mbps|
|1,001′ to 2,500′||26 Mbps to 50 Mbps|
|2,501′ 4,500′||25 Mbps|
What does the actual network look like?
VDSL at your home is delivered by copper from the nearest wire center, and the wire center is fed with fiber optic cable. Wire centers can be located in a central office (CO) or at a remote location (a secure cabinet in the field) that’s connected to the CO with fiber optic cable.