Hitachi HPW-200EC Gn Select Guard Tone, Kn Flow Control, Mn Mode Selection, Qn Mode Selection

&Gn - Select Guard Tone

This command instructs the modem which if any guard tone should be used for V.22/V.22bis

modulation.
&G0	Disables guard tone (default)
&G1	Selects 500Hz guard tone
&G2	Selects 1800 Hz guard tone

&Kn - Flow Control

This command instructs the modem which flow control method to use.

&K0	Disables flow control
&K3	Enables RTS/CTS flow control (default)
&K4	Enables XON/XOFF flow control
&K6	Enables both RTS/CTS and XON/XOFF flow control

&Mn - Mode Selection

This command is used for compatibility only. &Q commands should be used for mode control.

&M0	Selects normal buffered mode
&M1	Returns ERROR
&M2	Returns ERROR
&M3	Returns ERROR

&Pn - Pulse Dialing Control

This command controls the pulse dial make/break ratio.

&P0	Selects 39%-61% make/break ratio at 10 pulses per second (default)
&P2	Selects 39%-61% make/break ratio at 20 pulses per second
&Qn - Mode Selection
&Q0	Selects asynchronous normal buffered mode. Forces &Q6.
&Q1	Returns ERROR
&Q2	Returns ERROR
&Q3	Returns ERROR
&Q4	Returns ERROR
&Q5	The modem will try to establish error-corrected link using V.42 error correction. If the
	error-corrected link cannot be established, further operation will depend on S36 setting.
	(default)
&Q6	Selects asynchronous normal buffered mode.

&Sn - DSR (Data Set Ready) Option

This command controls DSR operations DSR indicates when the modem is connected to a communications channel and is ready. Ssync mode only. If the modem is in Sync mode, DSR is on during handshake and on-line off in test or idle mode.

&S0	DSR will be always ON (default)
&S1	DSR will go ON after modem signal has been detected and will go OFF after disconnect.

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