Cisco's IP Telephony product portfolio offers enterprises the opportunity to extend the life of their legacy analog voice devices and lower the total cost of ownership of their enterprise-class voice systems while taking advantage of the rich applications afforded by IP communications. Netvision Technologies  offers the complete line of Cisco VoIP (voice over IP) hardware products from Cisco VoIP Gateways to Cisco Media Convergence Servers (MCS) to Cisco IP Phones and all voice modules.