Okla. Admin. Code § 165:55-9-6
Whenever telecommunications service to any customer is inoperative, other than by causes beyond the control of the telecommunications service provider, and remains inoperative for more than twenty-four (24) consecutive hours after being reported by the customer or having been found to be interrupted by the TSP, the TSP shall refund upon request of the customer the prorated part of that month's local exchange service charges and any regulated equipment charges for the period of days during which the telephone service was not provided. The refund may be accomplished by an identified credit, on the next bill for telephone service. The maximum credit during a single billing period shall not exceed the amount of local exchange service charges. There shall be no diminution of allowed message units where billing is on a message unit basis or for toll charges. Further service obligation liability will be governed by the TSP's or IXC's tariff.
Okla. Admin. Code § 165:55-9-6