20:10:28:38Separation of circuit equipment into basic circuit equipment and special circuit equipment.

For the purpose of identifying and separating property associated with special services, circuit equipment included in categories 4.12, other than wideband equipment, 4.13, and 4.23 is identified as either basic circuit equipment or special circuit equipment. Basic circuit equipment is equipment that performs functions necessary to provide and operate channels suitable for voice transmission (telephone grade channels). Special circuit equipment is equipment that is peculiar to special service circuits.

Source: 19 SDR 111, effective January 31, 1993.