Patent ID: 7035381

Claim:
A method for identifying to a public safety answering point the location within a campus from which a telephone call originates, where the campus uses a private business exchange to communicate with the public safety answering point, which private business exchange includes a port at which the origin and destination telephone numbers of each call are produced, said method comprising the steps of: coupling at least said destination telephone numbers associated with each said call from said port of said private business exchange to a first computerized database, said first computerized database relating at least one of said destination telephone numbers to a particular emergency category; in response to at least those of said calls associated with a destination telephone number relating to said emergency category, addressing with said source telephone numbers a second database preloaded with information relating the source telephone numbers to the location of the source telephone, to thereby determine the location of said source telephone; and displaying to said public safety answering point at least the locations of those telephones which are the sources of calls addressed to telephone numbers associated with said emergency category.