Number Five Crossbar Switch
(Redirected from 5XB)
The No. 5 Crossbar (5XB) telephone switch is a type of telephone switch that was engineered by Bell Labs, built by Western Electric, and first installed in Media, PA in 1948.
The No. 5 Crossbar (5XB) telephone switch is a type of telephone switch that was engineered by Bell Labs, built by Western Electric, and first installed in Media, PA in 1948.