DSL
From Longman Dictionary of Contemporary EnglishDSLDSL /ˌdiː es ˈel/ noun [countable] technical (digital subscriber line) a telephone line that has special equipment which allows it to receive information from the Internet, or send information at very high speedsFrom Longman Business DictionaryDSLDSL noun [countable] COMPUTINGTELECOMMUNICATIONS (digital subscriber line) a type of telephone line that provides people with a fast connection to the Internet, digital television, and telephone services