Voice Authorization
Voice Authorization is a security measure used by the credit card industry to ensure that a particular purchase is being authorized by the actual card-holding customer and not someone else. Merchants only incur this fee if a Voice Authorization is initiated, and for most merchants it is a rare occurrence.
Voice Over IP
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and set of technologies for the transfer of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specially submit to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than through the public switched telephone network (PSTN).