Telecommunications terminal with improved control functions
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United States of America Patent
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Apr 16, 1991
Grant Date -
N/A
app pub date -
Jul 24, 1989
filing date -
Jul 25, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telecommunications terminal is provided which has a central unit (100) and a handset (200). The handset houses a microphone (210) and a speaker (220) and is connected to the central unit via a cord (300). The connecting cord has a plurality of wires (301-304) for conveying output signals from the microphone and input signals to the speaker. The telecommunications terminal incorporates at least one function under the manual control of its user. That function is controlled by a switching means (l1, l2; 230) housed in the handset, with the corresponding control signals being conveyed along said cord in the form of phantom D.C. voltages.
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