IP Telephony is a technology that allows voice communication to be transmitted over the internet instead of traditional telephone lines. It converts voice signals into digital data packets, which are then sent over the internet to the recipient. This method can reduce costs and improve flexibility, as it enables users to make calls from various devices, including computers and smartphones. One of the key components of IP Telephony is the use of Voice over Internet Protocol (VoIP), which facilitates the transmission of voice data. This technology supports features like video calls, voicemail, and conference calling, making it a versatile option for both personal and business communication.