e/Number Five Crossbar Switching System

Information
has gloss	eng: The Number Five Crossbar Switching System or 5XB switch, designed by Bell Labs and made by Western Electric, was in use in Bell System telephone exchanges from 1948 to the 1980s. Its principal use was as a Class 5 telephone switch, though variants were used as combined class 4/5 in rural areas and as a TWX switch.
lexicalization	eng: Number Five Crossbar Switching System
instance of	(noun) a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication central, telephone exchange, exchange