crossbar switch

(redirected from Cross-bar switch)

crossbar switch

[′krȯs‚bär ‚swich]
A switch having a three-dimensional arrangement of contacts and a magnet system that selects individual contacts according to their coordinates in the matrix.

Crossbar Switch


a relay-type switching device, used primarily in urban, rural, and long-distance automatic crossbar exchanges and automatic telegraph offices. This switch can make up to 20 connections simultaneously; the location of each connection is determined by the crosspoints of movable vertical and horizontal bars.


Karmazov, M. G., and G. B. Metel’skii. Avtomaticheskaia telefoniia. Moscow, 1963.
Avtomaticheskaia kommutatsiia i telefoniia, part 2. Edited by G. B. Metel’skii. Moscow, 1969.

crossbar switch

An earlier telephone switch. First used in the late 1930s, it was a mechanical device that used magnets and metal bars (crossbars) to close connections. Crossbar switches have been replaced with electronic switches (large-scale, specialized computer systems). See ESS and DMS. See also physical layer switch.
References in periodicals archive ?
Fujitsu, Sun's long-timer Sparc partner is using a third generation of its Hal Computer Systems Ltd's Sparc64 processor design (CI No 3,391) plus it appears, the high-speed, low-latency SynFinity cross-bar switch interconnect developed by its Fujitsu System Technologies unit (CI No 3,354).
The RamSan-710 includes 21 Flash boards, 2 high-bandwidth I/O modules (2 ports each), 1 management Ethernet port, and a fast cross-bar switch that connects everything for smooth data flow through the system.
By duplicating the system clock and cross-bar switch, the server also enables power and fan redundancy as well as replacement of each module without halting the system.
Named the Compaq HPC160 and Compaq HPC320, the new parallel servers are based on the industry-leading Compaq AlphaServer ES40 systems - quad-processor systems powered by new generation 500 MHz Alpha 21264 processors with revolutionary new cross-bar switch architecture.
5 million packets per second over a 16 gigabit non-blocking cross-bar switch which connects any combination of high speed data interfaces, including ATM (OC-3, OC-12), FDDI, Frame Relay, HIPPI or Fast Ethernet.