Telecommunications/Telephone Systems

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AT&T
225 W. Randolph Street, Floor 27C Chicago, IL 60606-1838
(800) 244-4444
 
Comcast Business Services
1500 McConnor Parkway Schaumburg, IL 60173
(847) 585-6457
 
Computer Labs USA
6141 W. Touhy Avenue Chicago, IL 60646-
(773) 853-0085
 
Converged Communication Systems/Avaya
2930 Central Street, Ste. 200 Evanston, IL 60201
(847) 424-1500 x 204
 
Stratosphere Networks
1732 Central Street Evanston, IL 60201
(877) 599-3999
 
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