Very high speed ADSL
Very High Speed ADSL ( VADSL ) is an outdated name for a DSL variant before VDSL was officially introduced as a name in 1995. VADSL essentially corresponds to VDSL, although VDSL also contains a symmetrical transmission mode.
See also: Asymmetric Digital Subscriber Line (ADSL), Very high data rate Digital Subscriber Line (VDSL)