Black Box MD403A user manual Bn Transmit Break, Gn Modem Port Flow Control, Jn Data Buffer Control

PORTABLE USB MODEM

Command:	\Bn	Transmit Break
Values:		n=0–9 in 100-ms units
Default:		3
Description:		In non-error-correction mode only, sends a break
		signal of the specified length to a remote modem.
		Works in conjunction with the \K command.
Command:	\Gn	Modem Port Flow Control
Values:		n=0
Default:		0
Description:	\G0	Returns an OK for backward compatibility with
		some software.
	\G1	Not supported—responds ERROR.
Command:	\Jn	Data Buffer Control
Values:		n=0
Default:		0
Description:	\J0	Enable data buffer—serial port speed is
		independent of connect speed.
	\J1	Disable data buffer—serial port speed is forced to
		the line speed.
Command:	\Kn	Break Control
Values:		n=0–5
Default:		5
Description:		Controls the response of the modem to a
		\B command. The response is different for each of
		three different states.
		Data mode. The modem receives the break from
		the computer:
	\K0	Enter online command mode, no break sent to the
		remote modem.
	\K1	Clear data buffers and send break to the remote
		modem.
	\K2	Same as \K0.
	\K3	Send break immediately to the remote modem.
	\K4	Same as \K0.
	\K5	Send break to the remote modem in sequence with
		the transmitted data.

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