ZAGREB (Croatia), February 15 (SeeNews) – Croatian fixed-line operator Optima Telekom [ZSE:OPTE-R-A] said its consolidated EBITDA (earnings before interest, taxes, depreciation and amortisation) surged to 54.6 million kuna ($9.97 million/7.4 million euro) in 2010 from 22.7 million kuna a year earlier.