Perle Systems STS, SCS manual AT&Sn, AT&Rn, AT&Cn

Virtual Modem Initialization Commands

Command	Description	Options
AT&Z1	Set command allows the user to store an IP
	address and port number or phone number to
	use when making a connection. The user will
	issue an ATDS1 to cause the IOLAN to initiate
	the connection.
AT&Sn	Sets the behavior of IOLAN’s DTR signal.	n=0, DTR signal always high.
	(DSR from a DCE perspective)	(default)
		n=2, DTR signal acts as DCD.
		n=3, DTR signal acts as RI.
AT&Rn	Sets the behavior of IOLAN’s RTS signal. (CTS	n=0, RTS always high. (default).
	from a DCE perspective)	n=3, RTS signal acts as DCD.
	If line is configured for hardware flow control,	n=4, RTS signal acts as RI.
	the RTS is used for this purpose and the setting
	of this command is ignored.
AT&Cn	Sets the behaviour of the DCD signal.	n=0, DCD always on.
		n=1, DCD follows state of
		connection (off when no
		connection, on when TCP
		connection exists). (default)
AT&F	Sets the modes back to the factory defaults. This
	is a hard-coded default configuration which
	does not look at any user configuration.
ATS2	Sets the value of the S2 register. The S2 register
	controls which character is used to enter
	"command" mode. (this is the potential
	replacement for the +++ (default) in front of the
	ATH command).
	This register will hold the hex value of the
	"escape" character. Any value > 27 will disable
	the ability to escape into "command" mode.
ATS12	Sets the value of the S12 register. The S12
	register controls the minimum length of idle
	time which must elapse between the receipt of
	the escape character and the A (first character of
	the ATH sequence). Units are 1/50th of a
	second. The default is 50 = 1 second.
ATO	(ATD with no phone number) Establishes a
	connection using the IP and port specified in the
	telephone number field.
ATDS1	Establishes a connection using the IP and port
	(or phone number) specified in the Phone
	Number field (stored by the AT&Z1 command).

350 IOLAN SDS/SCS/STS User’s Guide, Version 3.6