3Com 1.024.1644-00 manual S27

			Technical Reference
Register	Default	Function
S27 (Continued)		Bit	Value	Result
		2	4	Disables V.32 modulation.
		3	8	Disables 2100 Hz answer tone to
				allow two V.42 modems to connect
				faster.
		4	16	Enables V.23 fallback mode.
		5	32	Disables V.32bis mode.
		6	64	Disable V.42 selective reject.
		7	128	Software compatibility mode. This
				setting disables the codes and
				displays the 9600 code instead. The
				actual rate of the call can be viewed on
				the ATI6 screen. Used for unusual
				software incompatibilities. Some
				software may not accept 7200,
				12,000, and 14,400 bps or greater
				result codes.
S28	0	Eliminates the V.32 answer tones for a faster connection.
	8	Default item, all times are in tenths of seconds.
	255	Disables all connections except V.32 at 9600 bps.
S29	20	Sets the duration, in tenths of a second, of the V.21
		answer mode fallback timer.
S30	0	Reserved
S31	128	Reserved

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