New Phone Technologies Can Help Colleges Communicate Campuswide in Emergencies

Raju Rishi came here to George Washington University on Monday night last week to pitch a new campus-communications system to students. Mr. Rishi, a founder of Rave Wireless Inc., started by asking for a moment of silence. "Because of what happened at Virginia Tech today," he explained.

After a minute he continued: "A lot of what I'm talking about takes on new relevance because this system is based on cellphones."

Virginia Tech officials had sent out e-mail alerts during the

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