A soft phone is a computer application that allows users to make telephone calls directly from their computer. A soft phone is most often used in conjunction with Voice over Internet Protocol (VoIP). With a soft phone, calls can be made from the PC to a phone line, from a phone to the PC, or between soft phone-enabled computers.
Commands can be entered through either the keyboard or the onscreen interface. Conversations are conducted on a headset/microphone combination.
Voice services include dial tone and telephone support as well as consulting, design, and engineering of voice technologies and applications.
Telephones are used to communicate between distant points. Today's desktop, mobile, and soft phones are equipped with a multitude of functionality to promote communication and collaboration.