A facility housing 9-1-1 telephone equipment shall: Be equipped at all exposed terminations, including central office distributing frames, with protective devices that prevent accidental worker contact; and Include clearly identified protected terminations to distinguish protected terminations from other circuitry. A protected circuit may not be opened, grounded, short-circuited, or manipulated in any way by a telephone company worker without the local telephone company first obtaining approval for circuit release from the appropriate public safety answering point. A telephone company shall ensure that telephone company employees who work in facilities associated with the 9-1-1 service are familiar with procedures for safeguarding 9-1-1 system equipment.