Identify the part of the system that corresponds to the network (the protocol stack)

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Comparison of PSTN with VOIP

   Look for the following reference in the network over conventional telephony (PSTN SS7) http://www.zytrax.com/tech/ss7/ss7_intro.html.

  Identify the part of the system that corresponds to the network (the protocol stack)

  Compare it with the protocols used in VOIP, you should look for the protocols of the physical levels, data link, network and transport of TCP / IP to be able to make the comparison.

   Include diagrams summarizing both systems.

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