(a) Service providers shall provide full and prompt investigation of complaints, oral or written, received either through normal reporting channels or through the commission, and appropriate responses shall be made with respect to complaints.

(b) Service providers shall have a representative available to receive customer trouble reports at all hours.

(c) Troubles of an emergency nature shall be cleared at all hours, consistent with the bona fide needs of consumers and the personal safety of service provider personnel.

(d) All other out-of-service troubles not requiring unusual repairs shall normally be cleared within 24 hours excluding Sundays and holidays.

(e) Commitments made with consumers should be kept. In the event of unavoidable change by the service provider, such as if unusual repairs are required, or rehabilitation programs or other factors preclude clearing of reported trouble promptly, reasonable attempts shall be made to notify the customer as to when the trouble will be cleared.

(f) During major service outages of extended duration, the service provider shall make every effort to inform the general public of the details of the outage, including the areas affected and a schedule for expected service restoral. Whenever reasonable and practical, affected offices shall be intercepted and callers advised that a service outage has taken place, in accordance with accepted industry standards.

(g) All local service providers shall assist consumers reporting obscene, threatening or harassing calls, to help in eliminating such calls.