Convergence Switching and the Next-Generation Carrier

Todays tdm pstn was designed to accommodate a single

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Unformatted text preview: roForum Tutorials Copyright © The International Engineering Consortium 8/14 4. Today’s TDM PSTN was designed to accommodate a single application. a. true b. false 5. At present, voice service revenues constitute _______ percent of service providers’ net revenues. a. 20 b. 40 c. 60 d. 80 6. At present, which of the following is used to accommodate voice applications? a. the PSTN b. ATM networks 7. An ATM–based tandem switch can be built for a small fraction of the cost per port of a traditional TDM–based switch. a. true b. false 8. To support all of the voice features to which readers are accustomed, convergence switching solutions need not include full-featured SS7 support nor fully interoperate with the existing PSTN infrastructure. a. true b. false 9. Converged switching architecture is characterized by all but which of the following? a. telephony-grade reliability b. scalability of port count and SS7 signaling power c. partial SS7 signaling power d. open architecture for rapid, simplified service deployment Web ProForum Tutorials Copyright © The International Engineering Consortium 9/14 10. An ATM–based converged switching solution forwards both voice and data traffic from DSLAMs, integrated access devices, and service access multiplexers to the PSTN, the Internet, and other data networks by using DACSs and other TDM equipment. a. true b. false Correct Answers 1. Convergence technologies completely interoperate with the existing PSTN infrastructure. a. true b. false See Overview. 2. Analysts predict that data will consume __________ percent of the world’s bandwidth by 2003. a. 50 b. 70 c. 90 d. 100 See Topic 1. 3. Which of the following will carriers not do as a result of shrinking telephony revenues and profitability? a. increase the number of overlay network platforms b. cap investment in traditional circuit switches c. migrate to a converged switching infrastructure d. provide more enhanced services See Topic 1. Web ProForum Tutorials Copyright © The...
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  • Spring '09
  • jahis
  • Telephone exchange, Asynchronous Transfer Mode, Signaling System 7, International Engineering Consortium, Web ProForum Tutorials

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