Internet telephony; VoIP
Refers to the technology or service of making phone calls over the Internet. Often used in technical contexts; see also IP電話.
See also: ＩＰ電話
Recently, the sound quality of Internet telephony has improved significantly.
Internet telephone; VoIP phone
Refers to a physical device or software application used for making calls over the Internet.
I bought a new Internet telephone and am saving on international call charges.