London, 21st February 2007 – Providing cost-efficient support to its GSM services across Croatia, Tele2, one of Europe’s largest alternative telecoms operators, has gone live with a new converged CRM and billing solution from Cerillion Technologies, the leading business support systems vendor. Working to tight project deadlines, Cerillion supplied a turnkey delivery, migrating Tele2 Croatia from their existing outsourced billing system to its own pre-integrated solution in less than three months.