IP Telephony allows data, voice, and video to be converged onto a single network infrastructure for reduced costs and improved manageability. Enabled by AVVID architecture, IP Telephony solutions include call processing, call center, and messaging applications, and related service and productivity applications.

• Voice over IP (VoIP) refers to a way to carry phone calls over an IP data network, whether the public Internet or an organizations own internal network. One of the primary attractions of VoIP is its ability to help companies reduce expenses because telephone calls travel over the data network rather than the phone companys network.
• IP Telephony encompasses the full suite of telephony services enabled by VoIP, including the interconnection of phones for actual communications; related services such as billing and dialing plans; and basic features such as conferencing, transfer, forward, hold, and many more. These services might previously have been provided by a private branch exchange (PBX)
• IP Communications evolves the concept another step to include business applications that enhance communications to enable applications such as unified messaging, integrated contact centers, and rich-media conferencing that combines voice, data, and video.