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What is a codec? The word codec comes from mashing together the functions of compressing (co) and decompressing (dec) analog sound into digital bits for use by computers and networks. There are literally hundreds of audio codecs -- pieces of computer code -- available today and embedded in any device that plays sound, from a simple MP3 player to the hottest smart phones. Some are open source and free while others are proprietary and/or patented, requiring licensing ...

So you've got some HD voice-capable phones and you want to make the move from G.711 narrowband into wide world of wideband. How will that affect your network? How do HD voice phones "talk" to other HD voice phones in your organization, other organizations, and the PSTN/POTS? The three keywords here are bandwidth, transcoding, and interconnection. And you really only need to worry about one of the three. Bandwidth If you are currently using G.711 to carry VoIP traffic, the codec ...