Junctor

A junctor is a circuit used in analog telephone exchanges, including the Number One Crossbar Switching System, Number Five Crossbar Switching System, Panel switch, 1ESS switch and other switches.

In early electromechanical switches including Panel switch, a "District Junctor" handled supervision and talk battery duties for outgoing calls, similar to the duties of the cord circuit of manual exhanges. The junctors for incoming calls were simple three-wire connections between the incoming frame and the line frame. In the later electromechanical 5XB switch, junctors only consisted of three wires to connect the two legs of a call: the line and the trunk, of which the latter supplied all talk battery and supervision.

Stored-program analog switches such as the 1ESS switch, had both simple wire junctors and circuit junctors. Circuit junctors were in the form of plug-in circuit boards to provide talk battery and supervision for intraoffice calls and were closely similar to intraoffice trunk packs, with two scan points and two Signal Distributor points per circuit, two circuits per plug-in pack. Wire junctors were two-wire connections between trunk nets and other trunk nets or line nets. When three-way calling was introduced, three-port conference trunks were used, which only appeared on trunk nets. All junctors appeared in subgroups of sixteen on plugs or jacks at the Junctor Grouping Frame, where as many subgroups as required were plugged into other trunk nets, line nets, or circuit junctor frames.

This article related to telecommunications is a stub. You can help Wikipedia by expanding it.v · Categories: Telephony equipment Telecommunications stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Louise/Louiza metro station CoorsTek Look at other dictionaries: junctor —    An internal switching system connection between lines and trunks …   IT glossary of terms, acronyms and abbreviations JSW — Junctor Switch …   Acronyms JSW — Junctor Switch …   Acronyms von A bis Z 1ESS switch — The Number One Electronic Switching System, the first large scale Stored Program Control (SPC) telephone exchange or Electronic Switching System in the Bell System, was introduced in Succasunna, New Jersey, in May 1965[1]. The switching fabric… …   Wikipedia Number Five Crossbar Switching System — The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though… …   Wikipedia Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… …   Wikipedia Number One Crossbar Switching System — The Number One Crossbar Switching System, or 1XB switch, was the primary urban local telephone exchange design used by the Bell System in the mid 20th century. Its switch fabric topology was based on the earlier urban panel switch system, which,… …   Wikipedia Cord circuit — 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… …   Wikipedia Permanent signal — (PS) in US telephony jargon, or Permanent Loop in British usage, is a condition in which a POTS line is off hook without connection for an extended period of time. This is indicated in modern switches by the silent termination after the off hook… …   Wikipedia Automatic Message Accounting — (AMA) provides detail billing for telephone calls. When Direct Distance Dialing (DDD) was introduced in the USA, message registers no longer sufficed for dialed telephone calls. The need to record the time and phone number of each long distance… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”