AT&T announced Internet 18 service (then called "Max 18") in November 2008, and Internet 24 (then called "Max Turbo") was announced in December 2009. Basic, Express, Pro, Elite and Max (VDSL) are usually available for self-installation. Max (ADSL2+), Max Plus, and Max Turbo can be self-installed if only one jack is connected for DSL (through a splitter installed by a technician), or splitter-free if no landline shares the pair. Conditions where higher speeds are still attainable through filters or quality wiring to more than one jack occur less often.