Command and control signalling method and apparatus

Details Command and control signalling method and apparatus Command and control signalling method and apparatus

1993-06-03

1994-11-29

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 20, 380 49, H04K 100

Patent

active

053697030

ABSTRACT:
A local communication apparatus (e.g., a modem) is arranged to detect when a remote communication apparatus desires to switch from the data mode and enter a command/control mode. To accomplish mode switching, the remote apparatus sends a scrambled escape pattern, scrambled using a proprietary polynomial, over the data channel. After detecting the escape pattern the local apparatus switches to the command/control mode. In this mode, the remote and local apparatuses communicate using the proprietary scrambler/descrambler polynomial.

REFERENCES:
patent: 3919462 (1975-11-01), Hartung et al.
patent: 4322745 (1982-03-01), Saeki et al.
patent: 4611242 (1986-09-01), Williams
patent: 4677685 (1987-06-01), Kurisu
patent: 4716588 (1987-12-01), Thompson et al.

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