Closed electric circuit.

(1) A closed circuit. (2) The single connection from a switching center to an individual telecommunications instrument.

A closed circuit of a plumbing branch which supplies water from the riser to a fixture or a group of fixtures.

The closed path in an electrical circuit.

a complete electrical circuit around which current flows or a signal circulates

a subset of the rules that when traced forms a circuit

The physical circuit between the telephone switch and the voice processing board.

The physical circuit between the telephone switch and the D/xxx board.

An electrical circuit consisting of elements connected in series.

A communications channel from a switching center or an individual message distribution point to the user terminal. Go-and-return conductors of an electric circuit; a closed circuit. A closed path under measurement in a resistance test. A type of antenna, in the form of a circle or rectangle, usually used in direction-finding equipment and in UHF reception.