Cabletron Systems CSMIM-T1 Quiet, Fallback Modulation Speeds, Qn Serial-Port Flow Control, Q3

Chapter 7: AT Commands and Registers

Qn	Quiet
Q0	Enables output of result codes.
Q1	Disables output of result codes.
Q2	Disables answer mode result codes only.
	Determines whether the modem sends result codes and status
	codes (OK, BUSY, RING, etc.) to your computer.
-Qn	Fallback Modulation Speeds
-Q0	Disables fallback from a V.32bis or V.32 MNP reliable
	connection to an MNP reliable 2400 or 1,200 bps connection.
-Q1	Enables fallback from a V.32bis or V.32 MNP reliable connection
	to an MNP reliable 2,400 bps connection.
-Q2	Enables fallback from a V.32bis or V.32 MNP reliable connection
	to an MNP reliable 2,400 or 1,200 bps connection.
	Controls whether the modem can fall back from a V.32bis or V.32
	MNP reliable connection to a V.22bis MNP reliable connection at
	2,400 bps or a V.22 MNP reliable connection at 1,200 bps.
	Fallback may occur when poor telephone lines cause excessive
	MNP retransmissions.
	Fallback from a V.32bis or V.32 MNP reliable connection to a
	4,800 bps V.32bis or V.32 MNP reliable connection is always
	enabled, regardless of the -Q setting. The modem always uses the
	V.22 standard when it falls back from a V.32bis or V.32 MNP
	reliable connection to a 1,200 bps MNP reliable connection,
	regardless of the B setting.
\Qn	Serial-Port Flow Control
\Q0	Disables flow control.
\Q1	Enables bi-directional XON/XOFF flow control.
\Q2	Enables unidirectional hardware flow control; the modem uses
	CTS to control the terminal.
\Q3	Enables bi-directional hardware flow control.
\Q4	Enables unidirectional XON/XOFF flow control.
\Q5	Keeps CTS Off until connection for unidirectional hardware flow
	control.

7-30 CSMIM-T1 Hardware Installation Guide