(1) Each carrier providing services by means of its own facilities shall adopt a program of periodic tests, inspections, and preventive maintenance aimed at achieving efficient operation of its system and the rendition of safe, adequate, and continuous service.

(2) Each facilities-based carrier shall maintain or have access to test facilities enabling it to determine the operating and transmission capabilities of all equipment and facilities, both for routine maintenance and for trouble location. The actual transmission performance of the network shall be monitored in order to determine if the carrier's established objectives and operating requirements are met. This monitoring function shall consist of, but not be limited to, circuit order tests prior to placing trunks in service, routine periodic trunk maintenance tests, tests of actual switched trunk connections, periodic noise tests of a sample of customer loops in each exchange, and transmission surveys of the network.