Net2Phone Inc. and its subsidiary ADIR Technologies Inc. have filed a lawsuit against Cisco Systems Inc. seeking compensatory and punitive damages for breach of contract, the charging companies said Tuesday in a statement. Net2Phone, a provider of services for voice phone calls over the Internet, and ADIR, which makes Voice over Internet Protocol (VoIP) software, claim network-hardware giant Cisco breached a contract with Net2Phone, stole trade secrets, engaged in fraud and unfair competition and breached fiduciary duties. ADIR was setup by Net2Phone, of Newark, New Jersey, and Cisco, of San Jose, California, two years ago to make ADIR's software compatible with Cisco's hardware and to ultimately develop a "highly marketable" product for voice communication over the Internet. However, Cisco "seriously misinterpreted" the relationship, failed to support the project and produced its own competing product, according to Net2Phone and ADIR in their suit.