Complex sentence: In the United States, net2phone began offering consumer VoIP service in 1995, most VoIP services before 2003, including Delta Three, and iConnectHere required customers to make and receive phone calls through a computer except nikotel, which offered Cisco IP phones connecting to their network.
Split into simpler sentences: In the United States, net2phone began offering consumer VoIP service in 1995. Several companies offered VoIP service before 2003, including Delta Three, and iConnectHere, but those services required customers to make and receive phone calls through a computer except nikotel, which was offering Cisco IP phones connecting to their network.