HAVANA (AP) — Spanish telecom Telefonica denied Tuesday that it has anything to do with an undersea fiber-optic cable between Cuba and Venezuela, even as an analyst who monitors global data traffic noted an additional uptick in data speed to and from the island — suggesting the cable is in full operation.

In a brief statement to The Associated Press, Telefonica SA acknowledged that it provides service to Cuba’s state-run phone company, ETECSA, but disavowed any connection to the ALBA-1 cable, which was completed in February 2011.