| Previous slide | Next slide | Back to the first slide | View Graphic Version |
Now suppose that one of the conference participants is connected via POTS (plain old telephone service). Because the connection is bandwidth limited, the burst of data associated with the bitmap will be made longer - flattened and stretched in the graph above. Unfortunately, this interrupts the regular flow of audio packets.
One solution to this would be to limit the packet size and the packet rate of the bitmap stream. However, this solution suffers in two respects:
1. When audio is not being sent the bitmap delivery will be needlessly slowed down. It is a local rather than global solution.
2. Even with limits on the packet size and packet rate, the order of the packets is not guaranteed. e.g., instead of getting packets of Bitmap, Audio, Bitmap, Audio, you may get Bitmap, Bitmap, Audio, Audio. So there would be a jitter in arrival.