Alcatel Submarine Networks, London, has signed a $21-million contract with Telecommunications of Jamaica and Cable and Wireless Ltd. in the Cayman Islands to supply an undersea cable network in the Caribbean between the Cayman Islands and Jamaica. The 870-kilometer project is slated for completion this year and incorporates the longest link in the world to operate at 2.5 gigabits per second without using electronic boosters on the seabed. Plans call for undersea cable to be deployed to more than 6500 meters. To complete the first part of the contract, a 226-km link between the Grand Cayman and Cayman Brac will operate at the STM-4 rate of 622.08 megabits per second over one fiber pair. In the second part of the project, scheduled for completion in August, an STM-16, 2.5-Gbit/sec link will operate over one fiber pair between Kingston and Montego, Jamaica, via Cayman Brac and Grand Cayman.