"A particular set of conditions made the Duke wireless network experience some minor and temporary disruptions in service," Duke spokeswoman Tracy Futhey said in a written statement posted on the university's Web site. "Those conditions involve our deployment of a very large Cisco-based wireless network that supports multiple network protocols."
San Jose, Calif.-based Cisco Inc. (CSCO) said it worked with Duke and Apple this week to identify the network issue that was causing the problem.
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Elizabeth McNichols, a Cisco spokeswoman, declined to be more specific, and officials at Duke did not immediately return a message seeking additional comment.
"Cisco has provided a fix that has been applied to Duke's network and the problem has not occurred since," the company said in a written statement.
The school's Wi-Fi wireless network had jammed nine times for spans of about 10 minutes, and a review of network traffic led Duke's technology team to iPhone users.
Cupertino, Calif.-based Apple released the iPhone, its first cell phone, at the end of June. The phones retail for $499 to $599 and combine cell phone capability with a media player and Wi-Fi access.