COURIER HIGH SPEED MODEMS
GSTN (General Switch Telephone Network) Clear Down: The connection was
Illegal Command Code: The modem received an invalid V.42 bis (compression) frame.
Inactivity timeout: The modem detected no activity on the line for the duration specified in Register S19 (default is 0, timer disabled).
Invalid Codeword: The modem received an invalid V.42 bis (compression) frame.
Invalid speed: The modem is set to &N1 or higher, for a fixed link rate, and the remote modem is not operating at the same rate.
LD received: The remote modem sent an MNP error control Link Disconnect request.
Loop loss disconnect: The modem detected a loss of current on the loop connecting it with the telephone company central office. This usually occurs because the remote modem has hung up: the central office drops current momentarily when there is a disconnect at the other end of a call. Unless Register S38 is set higher than zero, the modem immediately hangs up at loop loss.
Loss of carrier: The modem detected loss of the remote modem's carrier and waited the duration specified in Register S10 (default is 0.7 seconds).
MNP incompatibility: The modem is set to &M5 and the remote modem does not have MNP capability, or there was an MNP negotiation procedure error.
Retransmit limit: The modems reached the maximum of twelve attempts to transfer a data frame without error.
SABME Timeout (Set Asynchronous Balance Mode Extended): The modems failed this part of V.42 link negotiation.
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