Error control negotiation based on modulation
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United States of America Patent
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Jan 20, 1998
Grant Date -
N/A
app pub date -
May 31, 1995
filing date -
May 31, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A modem dynamically selects the type of error-control negotiation sequence as a function of a negotiated parameter of the physical layer. In one embodiment of the invention, a modem selects between error-control negotiation sequences as a function of the type of modulation negotiated in the physical layer. In particular, the modem has at least two type of error-control negotiation sequences to select from: 'LAPM or Disconnect,' and 'LAPM, MNP or Buffer.' When the modem negotiates a V.32 or higher modulation, the modem uses the 'LAPM or Disconnect' error control negotiation sequence. However, when the modem negotiates a V.22 bis or lower modulation, the modem uses the 'LAPM, MNP or Buffer' error control sequence.
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