D). Diff-Serv Differentiated Services The Diff-Serv model divides traffic into a small number of classes to provide quality of service (QoS). PSTN Public Switched Telephone Network The worldwide voice telephone network. DNIS Dialed Number Identification Service A telephone function that sends the dialed telephone number to the answering service. SIP Session Initiation Protocol A protocol that provides telephony services similar to H.323, but is less complex and uses less resources. DTMF Clinton broadband guide, Clinton, KY guide broadband ClintonClinton guide, broadband Kentucky, Clinton broadband guide
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