Voice over IP (VoIP) will be one of the hottest areas in the European enterprise communications market in 2005. The technology is maturing, the business case is looking better, and enterprises are warming up. But this doesn’t mean VoIP is going to take over the world of enterprise communications very quickly. Forrester thinks most smart enterprises will opt for a gradual VoIP migration strategy that addresses key concerns around the business case, the possible use of hosted or managed offerings, organizational issues, and security. The telecom environment is more complex and fragmented in Europe than in the US; as a result, Forrester expects European enterprises to opt for more managed and hosted VoIP solutions than their US peers.