Ohio Rev. Code Ann. § 4927.01
(A) As used in this chapter:
(1) "Basic local exchange service" means residential-end-user access to and usage of telephone-company-provided services over a single line or small-business-end-user access to and usage of telephone-company-provided services over the primary access line of service, which in the case of residential and small-business access and usage is not part of a bundle or package of services, that does both of the following:
(b) Consists of all of the following services:
(5) "Incumbent local exchange carrier" means, with respect to an area, the local exchange carrier that:
(b)