Digital telephone system with terminals connected to a digital e

Details Digital telephone system with terminals connected to a digital e Digital telephone system with terminals connected to a digital e

1991-08-23

1995-03-28

Dwyer, James L.

Telephonic communications

Substation or terminal circuitry

Conversion of signal form

379386, 379201, 379350, 370 29, 370 30, H04M 1100

Patent

active

054024838

ABSTRACT:
A telephone apparatus includes a digital exchange unit and at least one digital telephone terminal connected to the digital exchange unit. The at least one digital telephone terminal generates monitoring signals and has multiple functions. All of the monitoring signals generated in the at least one digital telephone terminal are forwarded directly to the digital exchange unit. All of the functions of the at least one digital telephone terminal are controlled directly by the digital exchange unit through corresponding control signals.

REFERENCES:
patent: 4741026 (1988-04-01), Baxter et al.
patent: 4817147 (1989-03-01), Gorniak et al.
patent: 4897866 (1990-01-01), Majmudar et al.
patent: 4907255 (1990-03-01), Gulick et al.
patent: 4961185 (1990-10-01), Sawada

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