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PBX/PABX (Private Branch Exchange)

A PBX is a private telephone exchange used by an individual organisation as opposed to a public exchange operated by a carrier. PBXs offer greatly reduced costs on internal phone calls, as well as a range of additional telephony capabilities not available through the carrier network, including hunt groups, call forwarding and Direct Dial-Ins (DDIs) at a basic level, or full contact centre capabilities such as CPE, Contact Centre, ACD, ASR.