Private Branch Exchange, a telephone system within an organization that switches calls between internal users while sharing external phone lines.
Acronym for 'Private Branch Exchange', where 'branch' refers to a branch of the public telephone network. The term originated in the early 20th century when businesses needed their own switching systems to manage multiple internal phone lines efficiently.
Before PBX systems, businesses needed a separate phone line for every employee - imagine the cost and complexity! Modern PBX systems have evolved into VoIP (Voice over Internet Protocol) solutions that can handle video calls, messaging, and conference calls all through internet connections.
Complete word intelligence in one call. Free tier — 50 lookups/day.