Multi-drop communications device

Details Multi-drop communications device Multi-drop communications device

1977-06-17

1979-04-10

Claffy, Kathleen H.

Telegraphy

Systems

Printing

178 66R, 179 2DP, H04L 514

Patent

active

041490304

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.

REFERENCES:
patent: 3754196 (1973-08-01), Collins
patent: 3872408 (1975-03-01), Reilly
patent: 3899637 (1975-08-01), Willard et al.
patent: 3906167 (1975-09-01), Baker
patent: 3983324 (1976-09-01), Lacher
patent: 4056689 (1977-11-01), Freimanis

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