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14
Appendix
14-18 Di152f/Di183f
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
Touch-tone signals A signal used on the telephone line; used when calling on a
push-button line or using push-button services.
By pressing the [ ] key in the 10-Key Pad, touch-tone signals
are used, even if a dial phone line is connected.
Term Definition