Star coupler

Star coupler

A star coupler is a device that takes in an input signal and splits it into several output signals.

In fiber optics, and especially in telecommunications, a star coupler is a passive optical device, used in network applications. An optical signal introduced into any input port is distributed to all output ports. Because of the way a passive star coupler is constructed, the number of ports is usually a power of 2; "i.e.", two input ports and two output ports (a "two-port" coupler, customarily called a "directional coupler," or "splitter" ); four input ports and four output ports (a "four-port" coupler); eight input ports and eight output ports (an "eight-port" coupler), "etc".

DEC computers

A star coupler was also the name of a device sold by Digital Equipment Corporation (now part of Hewlett-Packard) of Maynard, Massachusetts. In this case, the star coupler interconnected links to computers via coaxial cable rather than optical fibres, but the function was essentially the same. The signal that was distributed was 70 Mb/s computer interconnect data and the star coupler provided two redundant paths of either 8 or 16 ports each. Digital's star coupler was developed for use with the VAX and later Alpha families of computers running Digital's VMS operating system, to provide a passive, highly reliable interconnect for Digital's cluster technology.


*Federal Standard 1037C
*FAA Glossary of Optical Communications Terms

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • star coupler —    A fiber optic coupler in which power at any input port is distributed to all output ports …   IT glossary of terms, acronyms and abbreviations

  • Power dividers and directional couplers — A 10 dB 1.7–2.2 GHz directional coupler. From left to right: input, coupled, isolated (terminated with a load), and transmitted port …   Wikipedia

  • VMScluster — A VMScluster is a computer cluster involving a group of computers running the OpenVMS operating system. Whereas tightly coupled multiprocessor systems run a single copy of the operating system, a VMScluster is loosely coupled: each machine runs… …   Wikipedia

  • Train Communication Network — The Train Communication Network (TCN) is a hierarchical combination of two fieldbus systems for digital operation of trains. It consists of the Multifunction Vehicle Bus (MVB) inside each coach and the Wire Train Bus (WTB) to connect the MVB… …   Wikipedia

  • звездообразный ответвитель — Пассивное устройство (число выходов обычно не менее четырех), которое равномерно распределяет энергию сигнала между своими выходами. [Л.М. Невдяев. Телекоммуникационные технологии. Англо русский толковый словарь справочник. Под редакцией Ю.М.… …   Справочник технического переводчика

  • разветвитель звездообразный — — [http://www.iks] Тематики электросвязь, основные понятия EN star coupler …   Справочник технического переводчика

  • N scale — This article is about the model railway track size. For the handheld video game system/mobile telephone, see N Gage. U.S. Prototype model of an N scale (1:160) Chesapeake and Ohio Railway 2 6 6 2 Mallèt shown with a pencil for size N scale is a… …   Wikipedia

  • motion-picture technology — Introduction       the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …   Universalium

  • Pentax K mount — The Pentax K mount, sometimes referred to as the PK mount , is a lens mount standard for mounting interchangeable photographic lenses to 35 mm single lens reflex (SLR) cameras. It was created by Pentax in 1975, [cite web | url =… …   Wikipedia

  • photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.