![]() It uses a Mac’s built-in microphone and speaker, and relies upon today’s processing power to convert analog audio to digital. A softphone essentially lets you replace the hardware box with your computer. You could then connect any standard telephone to that device and receive a dial tone. Until recently, VoIP required a small hardware device that you plugged directly into a cable or DSL modem (no computer required). Skype’s codecs, for example, deliver bit rates between 3 and 16 Kbps, depending on the amount of available bandwidth. VoIP achieves this feat by relying on several proprietary audio codecs that compress the voice data before sending it and then decompress it on the receiving end. ![]() When you use VoIP, you send voice data over packet-based networks (for example, the Internet) instead of over traditional telephone networks. Softphones are based on Voice over Internet Protocol (VoIP). ![]()
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