Telecommunications
- AT&T
- Verizon
- DukeNet Communications
- XO
- CenturyLink
- Sprint
- Time Warner
- MCI
- Level 3
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Consultancies
- IBM
- Cisco Systems
- Deloitte Consulting
- Morgan Stanley
- Ericsson
- Booz Allen Hamilton
- Altman Vilandrie & Co
- IBI Group
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State and Local Government
- State of New York
- State of Florida
- State of Arkansas
- State of Illinois
- Orange Co, CA
- City of Oakland, CA
- FCC
- Federal Government Agencies
- United State Marine Corp
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Universities
- Massachusetts Institute of Technology
- University of Florida
- The Ohio State University
- Virginia Tech
- University of Colorado
- University of Oklahoma
- Columbia University
- NYU
- George Mason University
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Wireless
- Verizon Wireless
- Sprint
- American Tower
- Fiber Tower
- Towersource
- Pinnacle Wireless
- Open Range
- TowerCo
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Enterprise
- Nokia-Siemens
- Citigroup
- Trammell Crow
- Jones, Lang, LaSalle
- Google
- Terremark
- JP Morgan Chase
- General Electric
- Boeing
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GeoTel Communications Charitable Involvement:


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