PERFORMANCE OF VoIP IN PUBLIC SYSTEMS
This part of the chapter examines a test conducted by 3Com on the performance of VoIP in the public Internet. The source for this study is [COX98].
The study entailed sending and receiving traffic between three nodes: University of California, Davis; University of Illinois, Chicago; and DePaul University, see Figure 8-11. The tests were run for a six-month period. During these tests, a client would transmit once per hour to a server for three minutes. The transmissions involved a trace which allowed the analysts to judge RTT as well as packet loss. The engineers designed their own "ping" program and did not rely on internet pings in order to control how routers handle conventional ping packets. Observations ...
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