Tallgrass Systems, Ltd. Share: Computer Networking Tallgrass Systems, Ltd. Visit Website 14620 John HumphreyDrive Orland Park, IL 60462 (708) 349-2212 (708) 349-1353 (fax) www.gotsl.com Rep Info Map Whom to Contact Lou Mule What's Nearby? Distance: 5 10 15 20 25 50 mi.