ZyXEL Communications 56K II, 56K Plus II, Omni 56K II Bit, Dec, Hex, +nnn, Note:

Omni 56K II and Omni 56K Plus II User’s Guide

COMMAND	BIT	DEC	HEX	FUNCTION AND DESCRIPTION	REF.
		0 to	0-FF	To process the CND, silence must be detected for the
		255		specified interval, in 20 ms units.
S48=	bit	dec	hex	Bit-mapped register.	+000
	0	1	1	This causes CND information to be reported in raw
				format.
	2	4	4	This enables the sending of data calling tones (CNG).
	3	8	8	Reverses the V.23 channel speed. Originate mode	&N12
				modem speed (Send/Receive) 1200/75; Answer mode
				modem speed (Send/Receive) 75/1200.
	4	16	10	(Works with the &D1 command) DTR ON causes the
				modem to dial the default number and DTR OFF
				causes the modem to hang-up and reset to profile 0.
				When the modem is idle (waiting for a command), it
				does not dial any number when DTR changes from
				ON to OFF.
S52=	bit	Dec	hex	Bit-mapped register.	+000
	7	0	0	Select 'Mark' as the first signal of the V.23	&N12
				handshaking sequence (default).
		128	80	Select 'Space' as the first signal of the V.23	&N12
				handshaking sequence (default).
S56=	bit	dec	hex		+000
		0 to	0-FF	Hook flash detect time, in units of 10ms. A value of
		255		zero uses country-specific default duration.
S57=	bit	dec	hex	Bit-mapped register.	+016
	4	16	10	Enables the reporting of Class 1 capability in response
				to +FCLASS=?
Bit	S-register bit number, 'b', used in 'ATSr.b=n' and 'ATSr.b=?'
Dec	Decimal value, 'x', used in 'ATSn=x'
Hex	Equivalent Hexadecimal value.
+nnn	Factory default when listed in 'Reference' column.
Note:	AT' is omitted when an AT command is referred to in the 'Reference' column.

5-34 Command Sets