Question

Define principles of crossbar switching

Answer 1

the basic element of any crossbar system is the crossbar switch through which all talking connection are made .the crossbar switch is essentially a relay mechanism consisting of ten horizontal paths and ten or 20 vertical paths....
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Answer 2

in  electronics, a crossbar switch (cross-point switch, matrix switch) is a collection of switches arranged in a matrix configuration. A crossbar switch has multiple input and output lines that form a crossed pattern of interconnecting lines between which a connection may be established by closing a switch located at each intersection, the elements of the matrix. Originally, a crossbar switch consisted literally of crossing metal bars that provided the input and output paths. Later implementations achieved the same switching topology in solid state semiconductor chips. The cross-point switch is one of the principal switch architectures, together with a rotary switch, memory switch, and a crossover switch.