Abstract: In a packet switched multiplexed data/voice communication system, timed loopbacks along a subscriber line are effected by purposely extinguishing or killing the DATA carrier sewing the line.

Abstract: A fault isolating apparatus, system and method employing a fault isolator comprising first, second, third and fourth ports, the first and third ports being adapted to be connected to the ring and tip lines of a subscriber loop and the second and fourth ports being adapted to be connected to a subscriber location; and first and second circuit means connected between the first and second ports and the third and fourth ports, the first circuit means being adapted to block the passage of current from the first to the second port and to allow the passage of current from the second to the first port and the second circuit means being adapted to allow passage of current from the third to fourth port and to block passage of current from fourth to the third port.

Abstract: A duct for carrying cable comprising a tubular member having a barrel portion and a larger diameter bell portion, the duct further comprising a member disposed in the barrel portion for segmenting the barrel portion into compartments, the segmenting member have a first section and a second section, the second section extending into the bell portion and being adapted to interfit with the first section.

Abstract: A bridging connector for use in a telephone central office wherein the connector body has first and second rows of sockets on a first face and first and second rows of wire wrap terminals on a second face, the terminals being electrically connected to the sockets, and wherein a PC card is mounted on the body so that the wire wrap pins pass through first and second rows of apertures, these apertures being electrically connected to corresponding rows of holes through which extend first and second rows of connecting pins.