The terms VoIP and Internet telephony are often used interchangeably, but they are not synonymous. VoIP is an enabling technology that converts a standard voice call into IP packets.
Internet telephony places a voice call by sending converted voice packets over the public Internet.
However, enterprises should take caution in using Internet telephony for critical voice traffic since its delivery is not conducive to real-time voice. Here's a glance at what to expect from VoIP now and in the near future. Long distance and international toll arbitrage is the logical first step for VoIP since it is an effective cost saving strategy. The first place you may want to experiment with VoIP is international telephone calls between your company's own sites. Since intranets are a somewhat controlled environment, you may want to experiment with VoIP technology in your organization's intranet.