Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Patent
1997-03-31
2000-04-25
Hsu, Alpus H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via frequency channels
370522, 370525, 379418, H04J 102, H04J 312, H04M 300
Patent
active
06055245&
ABSTRACT:
An apparatus and method for facilitating interaction during a communication session between an analog modem and a terminal adapter for conveying digital alert tones and control data therebetween is provided. The embodiments provide for a collateral digital communication path between a microcontroller of an analog modem and a microcontroller of a terminal adapter for selectively relaying digital alert tones and control data therebetween. One embodiment utilizes a cellular interface of an analog modem for tapping and evaluating information for the presence of control data. Upon successful identification of control data, the microcontroller of a terminal adapter is notified and the specific control data detected in identified. By providing a method of apparatus for digitally relaying control data, accuracy of identification of control data by a terminal adapter is enhanced by foregoing needless signal transformation and retransformation.
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Arnesen David M.
Hanline Jeffrey A.
Kunz Richard A.
Mitchell Eric P.
Wilson Gerald A.
3Com Corporation
Hsu Alpus H.
Qureshi Afsar M.
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