DQ 1: Voice over the Internet Protocol (VoIP). What is VoIP and how is it different from the Plain Old Telephone Service (POTS)? What are some issues an organization (not individuals) should analyze when evaluating the move from a traditional phone system to VoIP? Explain the impact (positive and negative) on an organization when moving to and using VoIP.DQ 2: What is the nature of digital signals, binary, and other multilevel signal types? What are the advantages of digital signals over analog signals? Cover noise suppression in your explanation. DQ 3: Explain digital multiplexing, the digital T(X), and SONET hierarchy. Explain the differences between the American and European systems.Explain digital services such as Integrated Services Digital Network, Switched Multimegabit Data System, and Switch 56.