With approximately 24,000 school district phones (including 2,700 at its central office), 600 PBX and key systems, 16,000 centrex lines, and more than 1,200 data circuits, the Chicago Public Schools' telecommunications infrastructure was massive. To bring the system into the 21st century--and ultimately save millions of dollars in telephone line charges--the district's Office of Technology Services decided to make the switch to Voice over Internet Protocol (VoIP) technology.

The resulting $28 million Advanced Telecommunications Project is believed to be among the largest K-12 communications deployments of its kind in the United States. Installation already has begun and will continue


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