External device interface for an electronic telephone

Details External device interface for an electronic telephone External device interface for an electronic telephone

1986-05-29

1987-08-25

Rubinson, Gene Z.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379442, H04M 1100

Patent

active

046898140

ABSTRACT:
A telephone switch (10) having a data port (DNS) and a vioice port (VPS) is connected to an electronic telephone (12) having a data port (DNT) and a voice port (VPT) through the preferred embodiment (19). A plurality of external devices (13a, 13b, . . . 13n) are also connected to the preferred embodiment (19). When no external device (13a, 13b, . . . 13n) is active, a relay (33) directly connects the voice port (VPS) of the telephone switch (10) to the voice port (VPT) of the electronic telephone (12). When an external device (13a, 13b, . . . 13n) is active, the relay (33) directly connects the voice port (VPS) of the telephone switch (10) to the voice port (V) of the external device (13a, 13b, . . . 13n) and also connects these voice ports (VPS, V) to the voice port (VPT) of the electronic telephone (12) through a resistor network (20, 21, 24, 26, 30) which passes operating power to the electronic telephone (12) but reduces or eliminates audio signals to/from the electronic telephone (12).

REFERENCES:
patent: 4063045 (1977-12-01), Greischar
patent: 4306116 (1981-12-01), McClure et al.
patent: 4368358 (1983-01-01), Herschtal
patent: 4506112 (1985-03-01), Bitsch
patent: 4524244 (1985-06-01), Faggin et al.
patent: 4546212 (1985-10-01), Crowder, Sr.
patent: 4558369 (1985-12-01), Shinohara et al.
patent: 4578534 (1986-03-01), Shelley
patent: 4626631 (1986-12-01), Hanscom
patent: 4639553 (1987-01-01), Kiguchi

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