"The scale of the problem is very small right now," said Cannon, adding that the school is working with Apple and Cisco Systems Inc., Duke's network equipment provider, to pinpoint the problem. "But the more iPhones that are around, the more they could be knocking on the door for access."
The iPhone is Apple's first foray into the cellular phone business. The Cupertino, Calif.-based company released the product which combines a cell phone, media player and wireless Internet device at the end of June, with some consumers lining up outside stores days before the phones went on sale. The phones retail for $499 to $599.
The gadget can access the Internet through AT&T Inc.'s Edge network or through Wi-Fi. When a Wi-Fi hotspot is unavailable, it automatically switches to the slower network but continues to check for a Wi-Fi signal.
Ashok Agrawala, a computer science professor at the University of Maryland, speculated that both the phone and Duke's network are to blame for the glitches at the university. Agrawala said the phones could be struggling to regain a connection with a wireless access point, possibly when a wireless hotspot hands off to another.
"When you set up a network on the campus, you set up the network to accommodate the devices you have in use," Agrawala said, noting laptops as the primary users on college campuses. "Now with the popularity of the iPhones, the network parameters may not be set right.