In
telecommunications
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...
, 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 exchange
A telephone exchange, telephone switch, or central office is a central component of a telecommunications system in the public switched telephone network (PSTN) or in large enterprises. It facilitates the establishment of communication circuits ...
s 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.
See also
*
Switched loop
References
*
Telephony equipment
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