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%Q Line Signal Quality Command. This command reports the
line signal quality. Typical values are in the range from 0 to
2 and increase as the signal quality degrades. Based on this
value, retrain or fallback/fall forward may be initiated if
enabled by the %E1 or %E2 commands. The command
reports an ERROR if the modem is not connected, or is
connected at 300bps, V.23, or fax modes.
AT\ Commands
\An Maximum MNP Block Size Setting. This sets the maximum
allowable MNP block size. Block size is negotiated during
the MNP handshaking. In general, the better the line
quality, the larger the blocks. (See S40.)
\A0 64 characters.
\A1 128 characters.
\A2 192 characters.
\A3 256 characters.
\Bn Break Command. In reliable mode, the modem will signal
a BREAK through the active error correction protocol. In
non-error correction mode, the modem will transmit a
BREAK signal to the remote modem that is a length n
times 100 ms, where n is between 1 and 9 (the default for n
is 3). (See \Kn.)
\Gn Modem-to-Modem Software Flow Control Setting. This
command enables or disables software flow control
between your modem and a remote modem. During a
reliable connection, this setting is ignored. (See S41.)
\G0 Disable modem-to-modem software flow control.
\G1 Enable modem-to-modem software flow control.
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