Bidirectional telewriting system operating in an alternating mod

Details Bidirectional telewriting system operating in an alternating mod Bidirectional telewriting system operating in an alternating mod

1978-09-05

1980-07-22

Robinson, Thomas A.

Multiplex communications

Wide area network

Packet switching

178 19, H04L 516, G08C 2100

Patent

active

042141230

ABSTRACT:
A bidirectional telewriting system for two-way transmission of telewriting ata over a transmission channel which is shared by a speech link. A frequency window is used within the speech frequency band, within which a single carrier is used. A commutator at each terminal causes a reversal in the direction of transmission of the telewriting data over the single carrier.

REFERENCES:
patent: 3496293 (1970-02-01), Avery et al.
patent: 3851097 (1974-11-01), Rodgers
patent: 4071690 (1978-01-01), Joannou
patent: 4125743 (1978-11-01), O'Boyle et al.

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