Automatic data/voice sending/receiving mode switching device
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United States of America Patent
Stats
-
Oct 10, 1989
Grant Date -
N/A
app pub date -
Jun 8, 1987
filing date -
Jun 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A terminal device sends/receivers data and voice signals through a low speed circuit to/from another device, while switching automatically data and voice signals. The terminal device comprises a data sender/receiver, a voice sender/receiver, a modulator/demodulator, and an automatic mode switch. The automatic mode switch includes a circuit disposed beteen the data sender/receiver and the modulator/demodulator for detecting special data such as flags from received data coming from the modulator/demodulator, a circuit for making a logical product of the output of this detecting circuit and a detection signal of the received carrier and means for separating the voice sender/receiver from the circuit and transmitting a sending request for data sending/receiving use. Further switching over from the voice sending/receiving mode to the data sending/receiving mode is effected by key operations, etc.
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