In telecommunication, a cord circuit is a switchboard circuit in which a plug-terminated cord is used to establish connections manually between user lines or between trunks and user lines. A number of cord circuits are furnished as part of the switchboard position equipment. The cords may be referred to as front cord and rear cord or trunk cord and station cord. In modern cordless switchboards, the cord-circuit function is switch operated and may be programmable.
In early and middle 20th century telephone exchanges this task was done by a supervisory relay set known variously as Junctor Circuit or District Junctor. Later designs made it a function of the trunk circuit or absorbed it into software.
Famous quotes containing the words cord and/or circuit:
“Two are better than one; because they have a good reward for their labour. For if they fall, the one will lift up his fellow: but woe to him that is alone when he falleth; for he hath not another to help him up. Again, if two lie together, then they have heat: but how can one be warm alone? And if one prevail against him, two shall withstand him; and a threefold cord is not quickly broken.”
—Bible: Hebrew Ecclesiastes, 4:9-12.
“The Father and His angelic hierarchy
That made the magnitude and glory there
Stood in the circuit of a needle’s eye.”
—William Butler Yeats (1865–1939)