A large-scale computer used to route telephone calls in a central office. Such devices are made by Lucent, Nortel and others. See ESS, SS7, Class 4 switch, Class 5 switch and digital cross-connect.
"telephone switch." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/telephone-switch>.
telephone switch. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/telephone-switch