The combined services are expected to be attractive mostly to regional cable operators, Schoolar said.
Net2Phone's PacketCable platform provides cable operators with a variety of services, including call management, billing and provisioning. The Newark, N.J., company also offers a similar wireless VoIP platform based on the Session Initiation Protocol.
Combining the Net2Phone platforms with Level 3 technology is expected to reduce the overhead of cable companies providing telephone services, Net2Phone officials said.
"Complementing our existing VoIP offerings with Level 3's industry-leading local coverage and expertise will only improve our value proposition, as we market diversified cable telephony solutions," Stephen Greenberg, chief executive for Net2Phone, said in a statement.
In January, Level 3 launched a calling service for international markets and a toll-free calling service across the United States. In September of 2003, the company unveiled its local VoIP calling service in the U.S.