G.SHDSL is an international standard for symmetric
DSL developed by the
ITU. G.SHDSL (also known as G.991.2) is used for sending and receiving high-speed symmetrical data streams over a pair of
copper wires at rates between 192
kbps and 2.31 Mbps. G.SHDSL was developed to incorporate the features of other
DSL technologies, such as
ADSL and
SDSL. It can also transport
T1,
E1,
ISDN,
ATM and
IP signals. This is the first DSL technology to be developed from the ground up as an international standard.
G.SHDSL was ratified by the ITU in February 2001.