- Addison, Illinois-60101•Phone system installation
- Alsip, Illinois-60803•Phone system installation
- Arlington Heights, Illinois-60004-60005-60006•Phone system installation
- Aurora, Illinois-60502-60503-60504•Phone system installation
- Bedford Park, Illinois-60499•Phone system installation
- Bensenville, Illinois-60106•Phone system installation
- Berwyn, Illinois-60402•Phone system installation
- Bloomingdale, Illinois-60108•Phone system installation
- Blue Island, Ilinois-60406•Phone system installation
- Bolingbrook, Illinois-60440-60490•Phone system installation
- Bridgeview, Illinois-60455•Phone system installation
- Brookfield,Illinois-60513•Phone system installation
- Burbank, Illinois-60459•Phone system installation
- Burr Ridge, Illinois-60527•Phone system installation
- Calumet City, Illinois-60409•Phone system installation
- Carol Stream, Illinois-60128-60132-60188•Phone system installation
- Chicago, IT Services
- Chicago Ridge, Illinois-60415•Phone system installation
- Cook County•Phone system installation
- Crest Hill, Illinois-60403•Phone system installation
- Darien, Illinois-60561•Phone system installation
- Downers Grove, Illinois-60515-60516•Phone system installation
- Dupage County•Phone system installation
- Elk Grove Village, Illinois-60007-60009•Phone system installation
- Elmhurst, Illinois-60126•Phone system installation
- Evanston, Illinois-60201-60202-60204•Phone system installation
- Flossmoor, Illinois-60422•Phone system installation
- Forest Park, Illinois-60130•Phone system installation
- Fox Valley, Illinois-60599•Phone system installation
- Frankfort, Illinois-60423•Phone system installation
- Franklin Park, Illinois-60131•Phone system installation
- Glen Ellyn, Illinois-60137-60138•Phone system installation
- Glendale Heights, Illinois-60139•Phone system installation
- Grundy County •Phone system installation
- Hammond, Indiana-46320-46323-46324•Phone system installation
- Harvey, Illinois-60426•Phone system installation
- Highland, Indiana-46322•Phone system installation
- Hinsdale, Illinois-60521•Phone system installation
- Hoffman Estates-illinois-60179•Phone system installation
- Homer Glen, Illinois-60441-60491•Phone system installation
- Itasca, Illinois-60143•Phone system installation
- Joliet, Illinois-60431-60432-60433•Phone system installation
- Kane County, IT Services
- Kenilworth, Illinois-60043•Phone system installation
- Lagrange, Illinois-60525•Phone system installation
- Lansing, Illinois-60438•Phone system installation
- Lemont, Illinois-60439•Phone system installation
- Lisle, Illinois-60532•Phone system installation
- Lockport, Illinois-60441•Phone system installation
- Lombard, Illinois-60148•Phone system installation
- Manhattan Ilinois-60442•Phone system installation
- Matteson Illinois-60443•Phone system installation
- Mchenry, Illinois-60050•Phone system installation
- Melrose Park, Illinois-60160-60161•Phone system installation
- Midlothian, Illinois-60445•Phone system installation
- Mokena, Illinois-60448•Phone system installation
- Morris, Illinois-60450•Phone system installation
- Munster, Indiana-46321•Phone system installation
- Naperville, Illinois-60540-60563-60564•Phone system installation
- New Lenox, Illinois-60451•Phone system installation
- North Aurora, Illinois-60542•Phone system installation
- Northbrook, Illinois-60062-60065•Phone system installation
- Oak Brook Illinois-60523•Phone system installation
- Oak Forest, Illinois-60452•Phone system installation
- Oak Lawn, Illinois-60453•Phone system installation
- Olympia Fields, Illinois-60461•Phone system installation
- Orland Park, Illinois-60462-60467•Phone system installation
- Palatine, Illinois-60038-60067•Phone system installation
- Palos Heights, Illinois-60463•Phone system installation
- Park Forest, Illinois-60466•Phone system installation
- Plainfield, Illinois-60544-60585-60586•Phone system installation
- Riverside, Illinois-60546•Phone system installation
- Rolling Meadows, Illinois-60008•Phone system installation
- Romeoville, Illinois-60446•Phone system installation
- Roselle, Illinois-60172•Phone system installation
- Rosemont, Illinois-60018•Phone system installation
- Saint Charles-illinois-60174•Phone system installation
- Schaumburg, Illinois-60173-60193•Phone system installation
- Schaumburg, Illinois-60194-60195•Phone system installation
- Schiller Park, Illinois-60176•Phone system installation
- Streamwood, Illinois-60107•Phone system installation
- Summit Argo, Illinois-60501•Phone system installation
- Tinley Park, Illinois-60477-60487•Phone system installation
- Villa Park, Illinois-60181•Phone system installation
- Warrenville, Illinois-60555•Phone system installation
- West Suburbs Chicago•Phone system installation
- Wheeling, Illinois-60090•Phone system installation
- Will County, IT Services
- Willow Springs, Illinois-60480•Phone system installation
- Willowbrook, Illinois-60527•Phone system installation
- Woodridge, Illinois-60517•Phone system installation
- Worth, Illinois-60482•Phone system installation