e/Four-wire circuit

Information
has gloss	eng: In telecommunication, a four-wire circuit is a two-way circuit using two paths so arranged that the respective signals are transmitted in one direction only by one path and in the other direction by the other path. Late in the 20th century, almost all connections between telephone exchanges were four-wire circuits, while conventional phone lines into residences and businesses were two-wire circuits.
lexicalization	eng: Four wire circuit
lexicalization	eng: four-wire circuit
instance of	c/Communication circuits