G.lite
, which is sometimes called
splitterless
DSL
, is quickly dethroning ADSL for the most common
DSL variant, although technically it is only a subspecification of ADSL itself. As the
splitterless
nickname
infers, this technology does not require a splitter to be installed at the customer location. In this
splitterless installation, the provider isolates voice from data in the central office by controlling the
frequency of the voice channel.
The advantage to this type of installation is significant. In a splitter (ADSL) type of deployment,
the provider needs to visit the customer location and install a splitter on the line in addition to a
second jack—one jack is for the DSL router, and the other jack is for the telephone. The cost of
this is very high compared to the alternative of encoding the data and voice so the end equipment
can isolate the voice traffic where no splitter installation is required. G.lite installations can be
completed at the central office, and the user can simply plug their router into the jack as they
would a telephone.
G.lite is further described in ITU-T standard G.992.2.