Md. Bayezid Alam

A Personal Blog

VoIP, Internet Telephony

The terms Voice-over-Internet Protocol (“VoIP”), IP telephony, Internet telephony, and Voice-over-the-Internet (“VoN”) are given different meanings by different commentators and in fact have no universally agreed-upon meaning.  There are, however, distinctions to be kept in mind, for IP can be used in various ways for the transmission of voice.  As used in this memo, –

  • VoIP is a generic term that refers to all types of voice communication using Internet protocol (IP) technology instead of traditional circuit switched technology.  This includes use of packet technologies by telecommunications companies to carry voice at the core of their networks in ways that are not controlled by and not apparent to end users.
  • ·VoN, also called Internet telephony, on the other hand is a service that end users decide to use — it is a specialized form of VoIP in which a regular voice telephone call is transmitted via the public Internet, thus bypassing all or part of the public switched telephone network (PSTN).  Internet telephony can occur between computers (computer-to-computer), between a computer and a phone (computer-to-phone), and between phones (phone-to-phone).
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