UW Madison implemented the WiscAlerts text messaging system this fall.
The system is suppose to alert students of staff about any potential danger on or near campus.
Wednesday, officials tried it out and found a number of glitches.
Out of more than 13,000 students and staff, 25% did not receive the test message.
UW officials also report about a hundred subscribers got a delayed message.
WiscAlerts are used to alert students and staff of campus areas to avoid because of potential danger.
Campus officials say the system did not work with a number of students who use T-Mobile, Verizon, US Cellular and Alltel.
"The solution is to have a broad-based system. Text messaging isn't the only way to notify all your population," explains Lt. Michael Newton with UW Campus Police.
Newton says UW also uses email, Facebook and voice mail to notify students.
Officials are checking with cell providers on potential problems with text message delivery.
They believe it could be as simple as an unpaid cell bill or as complex as a system overload when WiscAlerts are sent.
UW students and staff can sign up for WiscAlerts by logging on to the "My UW Portal" and clicking on WiscAlerts.
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