Apparatus for auto-detecting dialing of a parallel communication device
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United States of America Patent
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Nov 17, 1998
Grant Date -
N/A
app pub date -
Feb 28, 1997
filing date -
Feb 28, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to an auto-detecting dialing communication system used to make the display of caller numbers in host or communication system consist with that of an extension telephone or communication system, especially relates to an extension telephone or communication system that can also display caller numbers. The present invention offer a device for auto-detecting dialing of a parallel communication system, which composes: (1) a FSK decoder for acquiring a dial-in number. (2) an extension telephone detecting device for detecting whether the extension telephone is off hook. (3) a memory for storing the caller telephone numbers. (4) a ring-back signal detecting device for examining whether a ring-back signal is sent back. (5) a Dual Tone Multiple Frequency (DTMF) decoder for acquiring the outgoing call number. (6) a processor for sequentially proceeding with output signals of the FSK (Frequency Shift keying) decoder, the extension telephone detecting device, the memory, the ring-back signal detecting device and the DTMF (Dual Tone Multiple Frequency)decoder according to an order.
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