iPedia Free Information Center

Information about Stored Program Control Exchange

Stored Program Control exchange (SPC) is the technical name used for telephone exchanges controlled by a computer program stored in the memory of the system. Early exchanges such as Strowger, Panel, Rotary, and Crossbar were electro mechanical and had no software control. SPC was introduced on a small scale in so called Electronic switching systems in the 1960s (the 101ESS PBX was a minor Bell System example) and on a large scale (1ESS switch was the major Bell System example) in the 1970s. SPC allowed more sophisticated Calling features. As SPC exchanges evolved, reliability and versatility increased. In the 1980s SPC completely took over the industry, hence the term lost all except historical interest.

See also

List of telephone switches
worldwide view of the subject.
Please [ improve this article] or discuss the issue on the talk page.
In the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls.
..... Click the link for more information.
The Strowger switch, also known as Step-by-Step or SxS, is an early electromechanical telephone switching system invented by Almon Brown Strowger. It is a specialized version of a stepping switch.
..... Click the link for more information.
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 system was named for its tall panels covered with 500 rows of terminals.
..... Click the link for more information.
crossbar switch is one of the principal architectures used to construct switches of many types. Originally the term was used literally, for a matrix switch controlled by a grid of crossing metal bars, and later was broadened to matrix switches in general.
..... Click the link for more information.
In telecommunications, an electronic switching system (ESS) is:
  • A telephone exchange based on the principles of time-division multiplexing of digitized analog signals.

..... Click the link for more information.
The Number One Electronic Switching System was the first large scale Stored Program Control (SPC) telephone exchange or Electronic Switching System in the Bell System, was introduced in Succasunna, NJ, in May 1965.
..... Click the link for more information.
A service feature is a capability added to a phone line in addition to the basic capability to make and receive telephone calls. Many of them require dialing a vertical service code.
..... Click the link for more information.
    Call Reassurance phone system

DSC Communications Corp.

(DSC merged with Alcatel-Lucent)
  • DEX 200
  • DEX 400
  • DEX 600
  • DEX 600E
  • DEX 600SC

Ericsson

  • AGF
  • AKE
  • AR10
  • ARB (telex)
  • ARE11
  • ARF10
  • ARF102
  • ARK

..... Click the link for more information.


This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
Herod_Archelaus


page counter