August 1999
Intermediate to advanced
328 pages
8h 50m
English
Content preview from Voice Over IPBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
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 ...