Canadian company Worldwide Fibre (WFI) will land the first transatlantic cable in Dublin.
The 12,200 km cable, Hibernia, will link Canada, the US, Ireland and the UK. It is expected to be the first transatlantic cable with a seamless transition between cities and traffic termination points in North America and Europe.
WFI is one of 50 companies in Dublin as part of a mission to increase trade between Ireland and Canada.
The Canadian minister for international trade, Mr Sergio Marchi, who is leading the mission, said it demonstrated how leading Canadian technology firms could work with Irish telecommunications companies to create opportunities for future business growth on both sides of the Atlantic.
The minister is also keen to "deepen and broaden" two-way trade between Ireland and Canada, which is worth Can$1.5 billion (£770 million), and to attract Irish investment to North America through Canada.
Already, Canadian companies invest about $8 billion in the Republic, making it the fourth largest location for investment globally. But much Irish investment is to the US rather than Canada.
"Canada is a sound world-class economy which provides a free trade area with the US, a doorstep to Asia and a bridge to Latin America," according to Mr Marchi.
The 50 companies in the trade mission are from sectors such as information technology and telecommunications, agri food and environmental technology.
Mr Marchi said the delegation is hoping the contact will lead to joint ventures between the Canadian companies and their Irish counterparts. The Canadian companies include Bombardier, owner of Shorts, Jetform and Nortel.