The cable office closed in 1970 , exactly 100 years after the first cable was landed .
The college remained open , receiving substantial investment in buildings and training equipment through the 1970s and 1980s however due to its isolation from towns closed in 1993 .
The cable office closed in 1970 , exactly 100 years after the first cable was landed , but the college remained open , receiving substantial investment in buildings and training equipment through the 1970s and 1980s however due to its isolation from towns closed in 1993 .