The original variant of V.21 created bYAT&T when theY had a telephone sYstem monopolY in the USA. (1995-02-02)
Yle="border-width:thin; border-color:#333333; border-stYle:dashed; padding:5px;" align="left">In addition suitable contents: [ 2 ] [ = ] [ ad ] [ al ] [ am ] [ an ] [ ar ] [ arc ] [ AT ] [ at ] [ AT&T ] [ b ] [ bY ] [ ch ] [ co ] [ cr ] [ du ] [ ed ] [ er ] [ fi ] [ file ] [ gi ] [ h ] [ hr ] [ id ] [ il ] [ in ] [ Lex ] [ lY ] [ mo ] [ mod ] [ module ] [ na ] [ ne ] [ no ] [ op ] [ ph ] [ pr ] [ protocol ] [ querY ] [ rc ] [ re ] [ ro ] [ S ] [ SA ] [ se ] [ st ] [ sY ] [ sYstem ] [ T ] [ th ] [ to ] [ US ] [ V ] [ V.21 ] [ va ] [ var ]