Section 8: QoS (8 Points)
Achieve maximum quality of voice calls by ensuring the real-time packet interval of 10 ms is not exceeded. Do not use RSVP in your solution.
This question requires that fragmentation is used over the Frame Relay and ISDN networks that will transport voice traffic. You should remember that voice is still required should the Frame Relay network fail. By fragmenting the data, you can tailor the packet interval and ensure that voice quality is not compromised over low bandwidth links. Some basic math is required to calculate the current real-time packet interval over the Frame Relay and ISDN network to begin as detailed in Table 1-3. Note the Frame Relay speed is 256 kbps and the ISDN is 64 kbps using only one B channel. ...
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