Gas Discharge Tubs Help Protect VDSL Equipment and xDSL SplittersVDSL(very-high-speed digital subscriber line)technology is similar to the well-known ADSL,and facilitates the delivery of information at speeds of up to 52 Mb/s.Standard VDSL deployment uses a frequency spectrum up to 12MHz,whereas VDSL2 allows for up to 30MHz as an option.