Key telephone system

Details Key telephone system Key telephone system

1989-11-30

1993-03-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370102, 379 94, 379165, H04J 302, H04M 126

Patent

active

051930897

ABSTRACT:
A key telephone system is provided with a main equipment including at least two extensions and at least one line wire which accommodates a digital line. The key telephone system is arranged to enable reciprocal data communications by effecting speed matching in data communications between a data terminal connected to the extension and the digital line accommodated in the line wire.

REFERENCES:
patent: 4658397 (1987-04-01), Kawamura et al.
patent: 4805165 (1989-02-01), Kawamura et al.
patent: 4893310 (1990-01-01), Robertson et al.
patent: 4932022 (1990-06-01), Keeney et al.
patent: 4942600 (1990-07-01), Suzuki
patent: 4953180 (1990-08-01), Fieschi et al.
patent: 4995073 (1991-02-01), Okata et al.
B. Jervis et al. "New Generation in Key System Design", Meridian Norstar; Telesis 1989 two pp. 5-20.

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