Changes

'''VoIP''', or ''''Voice over Internet Protocol'''', is the transmission of voice traffic over Internet protocol ([[IP]])-based networks. VoIP systems use session control protocols, which control the set-up and overall tear-down of calls and audio codecs, guaranteeing the digital audio transmission of speech over an IP network.<ref>[http://searchunifiedcommunications.techtarget.com/definition/VoIP Techtarget.com]</ref>

'''VoIP''', or '''Voice over Internet Protocol''', is the transmission of voice traffic over Internet protocol ([[IP]])-based networks. VoIP systems use session control protocols, which control the set-up and overall tear-down of calls and audio codecs, guaranteeing the digital audio transmission of speech over an IP network.<ref>[http://searchunifiedcommunications.techtarget.com/definition/VoIP Techtarget.com]</ref>

== How it works ==

== How it works ==