ZyXEL Communications U-336R/RE manual Command Options Function & Description

Command	Options	Function & Description		Ref.
	&N66	V.34	19200
	&N67	V.34	16800
	&N68	V.34	14400
	&N69	V.34	12000
	&N70	V.34	9600
	&N71	V.34	7200
	&N72	V.34	4800
	&N73	V.34	2400
&Pn		Pulse dial make/break ratio.		S23.2
	&P0 *	make / break, 39% / 61%
	&P1	make / break, 33% / 67%
&Rn		RTS (Request To Send) function		S21.5
		selection
	&R0	CTS tracks RTS, response delay is
		set in S26.
	&R1 *	Ignore RTS, assumes RTS always
		ON.
&Sn		Data Set Ready (DSR) function		S21.3
		selection.
	&S0 *	DSR overridden, DSR always ON.
	&S1	DSR according to CCITT (ITU-
		TSS). (See also S41.5, S44.4)
&Tn		Modem testing.		S16
	&T0	Terminate test in progress.
	&T1	Initiate Analog Loop-back (ALB)
		test.
	&T3	Initiate Local Digital Loop-back
		(LDL) test.
	&T4	Grant Remote Digital Loop-back		S14.1
		request from remote modem.
	&T5	Deny Remote Digital Loop-back		S14.1
		request from remote modem.

AT Command Set Summaries 87