Once connected, the high-capacity fibre-optic link will plug into the existing cable network between Guernsey, Jersey, France and the UK.
The first stage of Project Liberty, as JT is calling the initiative, will start early next month with a detailed sonar survey of the sea-bed between the UK, near Dartmouth, and L’Ancresse Bay in Guernsey.
JT has contracted the marine division of BT Global Services to lay the 78-mile cable.
The link is likely to be laid next autumn and should be completed early in 2008.
JT currently shares capacity on existing cables with Cable & Wireless and BT and negotiations on how bandwidth is shared out are understood to have stalled.
JT will have sole ownership of the new link.
C&W is currently laying its own fibre-optic cable between Guernsey and the UK.
