Dissecting a Telephony NetworkThe Public Switched Telephone Network: The Phone System That You Grew Up WithPrivate Branch Exchanges: How Big Businesses TalkKey Systems: How Small Businesses TalkRinging, Dial Tone, and Other Bells and WhistlesSupervisory SignalingLoop Start SignalingGround Start SignalingRingingAddress SignalingInformation SignalingCase Study: Your Turn to Put the Pieces in PlaceDesign Diagram for XYZ Company:Design Description for XYZ Company:Rationale for a VoIP Solution:Suggested SolutionDesign Diagram for XYZ CompanyDesign Description for XYZ CompanyRationale for a VoIP SolutionChapter SummaryChapter Review Questions