I need help answering the following questions. I will attach a copy. 

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1.(TCO 1) The legacy POST residential phones receive power from _____(Points : 5)power outlets at home.a Power over Ethernet (PoE) switch.its Central Office (CO).All of the aboveQuestion 2.2.(TCO 1) The _____ signal indicates a lack of resources in the circuit-switched PSTN.(Points :5)dial-tonering-backside-tonefast-busy or reorderQuestion 3.3.(TCO 1) Which of the following characteristics of an IP network doesn’t favor transmission ofvoice?(Points : 5)IP is a connectionless protocol. It provides no guarantees of delivery.Compared to a TDM channel/circuit, the bandwidth requirement for a call is higher if voice is packetizedwith header overhead.An IP network accepts packets at any time without any call admission control.All of the aboveQuestion 4.4.(TCO 2) From a circuit-switched Private Branch Exchange (PBX) to Central Office (CO),multiple conversations are simultaneously carried over a T-1 voice trunk using the _____ technology.(Points :5)Pulse Code Modulation (PCM)Time Division Multiplexing (TDM)Frequency Division Multiplexing (FDM)None of the aboveQuestion 5.5.(TCO 2) Which of the following could be an advantage of circuit-switched Private BranchExchange (PBX), as compared to IP-based/packet-based telephony systems?(Points : 5)Significant proprietary equipment costs.Expansion may be expensive for more and new modules.Hardware running dedicated cables needs to be managed separately from that of data network.Call latency is fixed, minimized, and not affected by other calls.Question 6.6.(TCO 5) Which of the following is not true about VoIP?(Points : 5)The sending device saves up the constant rate bit stream for a short interval, and then places those bits asthe data payload in a packet.The transport of digital information is over a dedicated channel like a PSTN circuit.The receiver extracts packet payloads and stitches them together, recreating the bit stream and turning itinto sound.None of the above