| Czech | English |
| pobočková ústředna | Private Branch Exchange (A private telephone network in an organization. Individual telephone numbers or extension numbers are supported, and calls are automatically routed to them. Users can call each other using extensions. They can also place calls to outside numbers) |
| pobočková ústředna | PBX (A private telephone network in an organization. Individual telephone numbers or extension numbers are supported, and calls are automatically routed to them. Users can call each other using extensions. They can also place calls to outside numbers) |
| telefon pobočkové ústředny | PBX phone (A proprietary phone connected to a PBX) |
