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SoundExpression
Command Description
Auto-retrain (V.22bis and V.32bis only). Determines whether or not the modem
automatically monitors the line quality and requests a retrain whenever the received
data signal quality falls below a threshold that may affect data reliability.
AT%E0 Disabled (DEFAULT).
AT%E1 Enabled.
Auto Fall forward/fallback Enable (V.32bis only). This command selects
whether the modem will automatically initiate a change to a higher or lower speed
depending on received signal quality (i.e., rate negotiation). The modem always
responds to any rate change initiated by the remote modem.
AT%G0 Disabled (DEFAULT).
AT%G1 Enabled.
Report Line Signal Quality. Returns a “high-order” byte of the calculated EQM (“eye
quality monitor”). The modem will automatically retrain if enabled by the AT%E1
command.
AT%Q(0-7) No retrain.
AT%Q(8-255) Modem performs a retrain (if configured for %E1)
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