Error control negotiation based on modulation

Details Error control negotiation based on modulation Error control negotiation based on modulation

1995-05-31

1998-01-20

Marcelo, Melvin

Multiplex communications

Diagnostic testing

Determination of communication parameters

375222, 379 9308, H04L 100

Patent

active

057107610

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.

REFERENCES:
patent: 4715044 (1987-12-01), Gartner
patent: 5384780 (1995-01-01), Lomp et al.
patent: 5430793 (1995-07-01), Ueltzen et al.
patent: 5481696 (1996-01-01), Lomp et al.
patent: 5550881 (1996-08-01), Sridhar et al.
patent: 5636037 (1997-06-01), Saitoh

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