ANTILLAS I is a fiber optic submarine communications cable that extends between the Dominican Republic and Puerto Rico. It has been in service since June 1997 and is operated on a common carrier basis. ANTILLAS I uses digital channels operating at 64 kilobits per second (kbit/s) that allow over 15,000 simultaneous calls without multiplexing. It consists of six working optical fiber pairs with each fiber pair carrying four 155 Mbit/s Basic System Modules (BSMs), with each BSM containing sixty-three Minimum Investment Units (MIUs), for a total capacity, on each fiber pair, of 252 MIUs. Carriers AT&T Corporation (AT&T) GTE Hawaiian Telephone Company Incorporated (HTC) IDB WorldCom Services (WorldCom) International Telecommunications Corporation (ITC) MCI International Pacific Gateway Exchange (PGE) Sprint Nextel Corporation (Sprint) Telecomunicaciones Ultramarinas de Puerto Rico (TUPR or ULTRACOM) Telefónica International Wholesale Services (TIWS) The St. Thomas and San Juan Telephone Company (STSJ) Landing points Cacique, Dominican Republic Isla Verde, Carolina, Puerto Rico Miramar, San Juan, Puerto Rico Punta Cana, Dominican Republic External links AMERICAS-II Cable Landing License as adopted by the Federal Communications Commission Liberty Latin America Submarine communications cables in the Caribbean Sea Communications in the Caribbean Dominican Republic–United States relations 1997 establishments in the Dominican Republic 1997 establishments in Puerto Rico