Escape sequence using monitoring of control signal states

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

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379 94, 375 8, H04M 1100, H04L 516

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active

053596480

ABSTRACT:
A method and apparatus for escaping from transparent mode in which the Data Communication Equipment will escape from transparent mode (into command mode) if a user programmed escape character string is received in coincidence with the toggling of a control signal such as Request To Send (RTS). Advantageously, this escape method can be used in conjunction with time/data escape methods that are based soley on activity on the received data line. When the two methods are used together, a supervisor program or control device can force an escape notwithstanding the user programmed time constraint parameters in the DCC.

REFERENCES:
patent: 4549302 (1985-10-01), Heatherington
patent: 4926448 (1990-05-01), Kraul et al.
patent: 4928305 (1990-05-01), Yui
ROLMphone User's Manual; pp. 11-4 to 11-10.

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