 Major telecommunication employers with headquarters in the state include Cincinnati Bell , Ohio Bell , a subsidiary of AT & T in Cleveland ; Ohio Telecom in Port Clinton , RACO Industries in Blue Ash , First Communications in Akron , and Horizon Telcom , Inc. in Chillicothe . Companies with operations in the state include L @-@ 3 Communications , Time Warner , AT & T , Verizon , Sprint , SBA Networks , Collabera Inc . , Cavalier Telephone , Waveland Communications , Embarq , Open Range Communications , Russell Cellular , and Windstream Communications . Frontier Communications in 2010 announced $ 150 million in investment in the state to upgrade systems and high @-@ speed internet services . 
