Voice over Internet Protocol (VoIP) Telephony
Voice over Internet Protocol (VoIP) telephony marries an enterprise's telephone system to its SOHO LAN. Marrying a Private Branch Exchange (PBX) to a SOHO LAN is not really a home office application because how many homes besides mine have their own PBX? However, there are low-end VoIP components for the home-office LAN that can be used to reduce long distance costs by providing free PC-to-PC VoIP connections and home-office LAN to Public Switched Telephone Network (PSTN) connections. Typically, a special telephony server or gate keeper is needed to provide the translation from the internal SOHO IP network to the dialup operation of the PSTN. See Figure 1.14.
Figure 1.14. VoIP LAN configuration.
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