(1) At least once every twenty-four hours, each local exchange company and each interexchange company owning, operating, or maintaining any portion of any dedicated 911 circuit must manually test, for continuity, the portion of the 911 circuit which it owns, operates, or maintains. This section does not apply to any dedicated 911 circuit, or portion thereof, if either (a), (b), or (c) of this subsection is satisfied:

(a) The circuit is carried by a transmission system (e.g., T-1 carrier) that is equipped with one or more alarms to detect loss of signal continuity;

(b) The circuit is equipped with one or more alarms to detect loss of signal continuity; or

(c) The circuit is automatically tested for signal continuity at least once every twenty-four hours.

(2) Any dedicated 911 circuit found to be defective must be immediately reported to the primary public safety answering point (PSAP) manager, and repairs must be undertaken promptly and pursued diligently by the company that has responsibility for operating or maintaining the circuit, or both. Companies are not required to repair any portion of any dedicated 911 circuit that they do not own, operate, or maintain.

(3) Each company must ensure that all dedicated 911 circuits and associated electronic equipment serving governmental emergency response agencies are clearly identified in the central office and the remote switch.