A unit of telecoms multinational Verizon Communications signed a direct interconnection agreement with the Cuban state monopoly Etecsa, expanding on existing roaming services in the Caribbean country, Etecsa said in a statement on Monday. Verizon last September became the first U.S.-based wireless company to offer roaming in Cuba, taking advantage of U.S. President Barack Obama's move to open relations with a former Cold War adversary of the United States.