PBXjärjestelmää
PBXjärjestelmää (public switched telephone network) refers to a private telephone exchange that connects internal telephone lines within an organization and manages connections to external telephone networks. The system routes calls locally, reducing the need for separate line connections to each employee. Traditional PBX systems were hardware‑centric, featuring dedicated circuit boards and analog interfaces. Modern IP‑based PBX (Asterisk, 3CX, Cisco Call Manager) uses software agents and TCP/IP protocols to enable voice over IP (VoIP), integration with other business applications, and scalable deployment through virtual machines or cloud services.
Core components include telephone trunks, extensions, a call manager, and trunk controllers. Trunks provide the physical
Typical use cases involve small businesses seeking cost‑efficient telephony, or larger enterprises requiring advanced features such
While legacy PBX systems were expensive and required physical maintenance, cloud‑based PBX solutions deliver lower upfront