14
Appendix
Term | Definition |
PBX | Abbreviation for private branch exchange |
| Exchange equipment installed in a company or a plant to |
| connect a number of telephone sets with multiple station lines in |
| order to enable unrestricted communications between the |
| telephone sets. |
|
|
Protocols | The necessary rules for communication |
|
|
A signal used on the telephone line; used when calling on a | |
| |
| By pressing the [ ] key in the |
| are used, even if a dial phone line is connected. |
|
|
Di152f/Di183f |