Ancestry - BT directories - 1903-1904 - Scot/.NW/ NI - page 507 - 508 = Oban
Transatlantic telephone cable
The first transatlantic telephone cable to cross the ocean connected Gallanach and Newfoundland and was inaugurated in September 25th 1956.
Two thin cables were laid across the sea bed for 150 nautical miles by the cable ship "Monarch" at depths of up to 15,000 feet.
Initially it carried 36 telephone lines.
The total project cost 120 million pounds
TAT-1 carried 588 London-US calls and 119 London-Canada calls in the first 24 hours of public service http://en.wikipedia.org/wiki/TAT-1