IP Telephony (Internet Protocol Telephony) is a technology that allows users to make voice calls over the internet using an IP network, such as the internet, instead of traditional telephone lines. IP Telephony uses Voice over Internet Protocol (VoIP) technology to transmit voice data over the internet, allowing users to make and receive calls from any location with an internet connection. IP Telephony also offers features such as call forwarding, voicemail, and conference calling.