Title: Multi-drop communications device

Abstract: A digital data modem arrangement is disclosed for use in a multi-drop communication system using either telephone lines or a pair of conductors. The communications device connected to a communications channel is readily adapted to a voice grade telephone line or a pair of continuous conductors. The disclosed digital data modem is capable of operating with either type of communications channel without the need of bridging amplifiers, and without substantially loading the impedance of the communications channel.

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Inventors: Foreman, Donald S. (Fridley, MN, US)

Application Number: 807467
Filing Date: 1977-06-17
Publication_date: 1979-04-10
Assignee: Honeywell Inc. (Minneapolis, MN)
Primary Class(es): 375/222 375/223, 375/258, 379/93.05
Other Classes:
US Patent Ref:

3754196	Aug, 1973	Collins	333/8.
3872408	Mar, 1975	Reilly	333/8.
3899637	Aug, 1975	Willard et al.	178/59.
3906167	Sep, 1975	Baker	179/16.
3983324	Sep, 1976	Lacher	178/59.
4056689	Nov, 1977	Freimanis	179/16.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Brigance, Gerald L.
Attorney: Feldman; Alfred N.