A DSL installation that does not require a splitter. For higher speeds, a RJ11 filter (sometimes called microfilters) is placed on every extension phone jack where an analog phone or other non-DSL device is used, thus filtering the DSL signal at the jack, rather than at the NID. For lower speeds, no filter is necessary. Without a filter or splitter, the DSL signal tends to cause audible interference on voice phones. G.Lite needs no splitter, nor filter, but this is the exception to the rule.