ZyXEL Communications U-336SA user manual AT Command Set Summaries

Command	Options		Function & Description	Ref.
			directory location n.
	*D0 *		(See also S35.4 and S38.0)
*En			Modem error control negotiation.	S21.0
	*E0	*	if error control negotiation fails, keep
			the non-error control connection.
	*E1		If error control negotiation fails,
			disconnect the call (hang-up).
*Fn			Remote configuration enable	S36.0
	*F0	*	Deny remote configuration
	*F1		Accept remote configuration (Remote
			Digital Loop-back must be granted,
			&T4)
*Gn			Security function selection	S36.5-7
	*G0	*	Disable security function
	*G1		Enable type 1 security, with password
			check (ZyXEL to ZyXEL only)
	*G2		Enable type 1 security, with password
			check and call back (ZyXEL to
			ZyXEL only)
	*G3		Enable type 2 security, with password
			check
	*G4		Enable type 2 security, with password
			check and call back
	*G5		Enable type 2 security, with password
			check and call back, remote user
			enters the call back number
*Hn	n=0-49		Modify user password table at
			location n.
*HS			Modify supervisory password
			(Default: “ZyXEL”)

AT Command Set Summaries 101