(digital Private Branch Exchange) A modern PBX that uses digital methods for switching in contrast to older PBXs that used analog methods. See PBX.
"digital PBX." YourDictionary, n.d. Web. 11 June 2018. <http://www.yourdictionary.com/digital-pbx>.
digital PBX. (n.d.). Retrieved June 11th, 2018, from http://www.yourdictionary.com/digital-pbx