Bandwidth capacity itself has not been an issue to date. The current bandwidth constraint point in the path is on a hub through which the Cisco servers connect to two ethernets. For that 10 megabit hub to be saturated, all lines would have to be simultaneously moving bits, e.g., all doing file transfers, and be doing so at the maximum possible rate of 28,800 bits per seconds. To date, all lines have never been in use simultaneously transferring data and an actual transfer rate of 28,800 bits per second seldom occurs even when users' modems do connect to the server's modems at that rate. Additional NARs were added to the campus pool.
Efforts are currently under way to obtain daily information on NARs use.