3Com PC Card manual Handshaking, Return to On-Line State, Return Result Codes, Verbose mode

30CHAPTER 5: USING THE MODEM

I2	The modem performs a ROM checksum, compares the result against a
	stored value, and returns an OK or ERROR message depending on the
	success of the comparison.
I3	The modem sends its ROM Part Numbers and Revision Levels.
I4	The modem sends its ASCII string test.
I5	The modem sends its data pump chipset revision.
I7	The modem sends platform specific information.

N: Handshaking

Selects whether a connection will be forced to a specific speed.

N0	Sets the required connection speed to that set under S37.
N1	If S-register S37 is not equal to 255 it allows handshaking at the highest
	speed supported by both modems. If S-register S37 equals 255 it allows
	handshaking at the highest speed supported by both modems and DTE.
N2	If S-register S37 is not equal to 255 it allows handshaking at the highest
	speed defined by S37. If S-register S37 equals 255 it allows handshaking
	at the highest speed supported by both modems and DTE.

O: Return to On-Line State

Applicable when a physical connection with a remote unit exists and the modem is in the on-line command state.

O0	Returns the modem to the on-line state.
O1	As O0 except that when a 2400 bits/s or higher connection is established
	an equalizer retrain sequence is transmitted.

Q: Return Result Codes

Defines whether the modem will issue result codes to the DTE.

Q0	Result codes returned.
Q1	Result codes not returned.
Q2	Result codes returned in originate mode only.

V: Verbose mode

Defines the form of result codes returned by the modem.

V0	Numeric form responses enabled.
V1	Verbose responses enabled (English responses).