Telegraphy – Systems – Printing
Patent
1976-05-24
1977-10-25
Robinson, Thomas A.
Telegraphy
Systems
Printing
178 2R, 179 2DP, H04M 100, H04M 900
Patent
active
040557294
ABSTRACT:
Ancillary equipment including a facsimile transceiver is directly connected to a telephone network through a coupling arrangement. The coupling arrangement includes a transfer relay for transferring the primary communication path to the telephone network between a telephone station set and the ancillary equipment. The transfer between the telephone station set and the ancillary equipment is controlled by a sensor which electrically senses a change from the off-hook to the on-hook state of the telephone set. The transfer is also controlled in response to the state of the ancillary equipment. The coupling arrangement also limits the signal power level coupled into the telephone network from the ancillary equipment.
REFERENCES:
patent: 3475557 (1969-10-01), Morse et al.
patent: 3822364 (1974-07-01), Lee
patent: 3876837 (1975-04-01), Gormley et al.
patent: 3962546 (1976-06-01), Hashimoto
Exxon Research & Engineering Co.
Norris Norman L.
Robinson Thomas A.
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