Telephone calling method and telephone apparatus

Details Telephone calling method and telephone apparatus Telephone calling method and telephone apparatus

1991-10-11

1993-04-13

Schreyer, Stafford

Telephonic communications

Multi-line or key substation system with selective switching...

With intercom system

379160, 379164, 379170, 379 61, H04M 172, H04M 900

Patent

active

052029174

ABSTRACT:
A person to whom a telephone call is directed is called at an extension either by voice only or by voice during each silent period of an audible ringing signal. A plurality of telephone sets are provided where each telephone set includes a receiver for receiving a telephone call and a called person signal representative of a called person to whom the telephone call is directed. A telephone call and the corresponding called person signal can be transferred to another telephone set by placing the caller on hold and accessing a base unit which transmits the call and the corresponding called person signal to the appropriate portable unit. Each unit in the system includes a voice signal amplifier and an audible ringing signal generating circuit to output the ringing and voice calls through a speaker.

REFERENCES:
patent: 4754476 (1988-06-01), Rasmussen et al.
patent: 4922526 (1990-05-01), Morganstein et al.

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