NETGEAR XM128 ISDN manual Model XM128 modem returns result code

Reference Guide for the Model XM128 ISDN Digital Modem

Table C-1.	Basic AT command set (continued)
Command	Options		Function and description
JSn	n=0-255		Sub-threshold for MPPP in Kbps unit
	*32
KAxn	n=0-63		Add-persist time interval for BOD; BOD disabled if n=0
	*0		x= M(in Minute unit) or S(in Second unit)
KSxn	n=0-63		Sub-persist time interval for BOD; BOD disabled if n=0
	*0		x= M(in Minute unit) or S(in Second unit)
Ln	n=0-3		Speaker volume control. The higher the value, the higher the volume.
	2 *
Mn	M=0-2		Speaker control.
	M0		Speaker always off.
	M1	*	Speaker on until call is answered.
	M2		Speaker always on.
Nn	n=0-3		Ring volume control. The No command disables the audio ring function.
	3 *
O			Return to online state
Pn	n=0-6		D channel protocol selection (USA) for American version
	P0	*	Northern Telecom proprietary ISDN
	P1		National ISDN 1 (1 SPID)
	P2		National ISDN 1 (2 SPID)
	P3		Reserved
	P4		AT&T custom point-to-point
	P5		AT&T custom point-to-multipoint (1 SPID)
	P6		AT&T custom point-to-multipoint (2 SPID)
Qn	n=0-1		Result code displayed. See also S-register 23.7. For a description of Extended
			S-registers, refer to Table D-4 on page D-5 in Appendix D, “Status Registers
			and Result Codes."
	Q0	*	The Model XM128 modem returns result code.
	Q1		The Model XM128 modem does not return result code.
Sr.b=n			Set bit b of S-register r to value n. The value n is a binary digit 0 or 1.
Sr.b?			Display value of bit b of S-register r.
Sr=n			Set S-register r to value n, which must be a decimal number between 0 and
			255.
Sr?			Display value stored in S-register r.
C-6			AT Command Set Reference