Digi 90000566_H manual Register Function Range Units Default

S-Register Definitions

Register			Function	Range	Units	Default
	General Options Status. Indicates the status of
	command options.
	• Default: 52 (34h) (00110100b)
	•	Bits 0 - 2: Ignored.
	• Bits 3-4: DTE’s DTR behavior (&Dn):
		0	= DTR drop is ignored (&D0).
		1	= DTR drop causes a transition from data to
			command mode without hanging up an existing
S21			connection (&D1).	-	-	52 (34h)
		2	= DTR drop hangs up the existing connection
			(&D2) (Default.)
		3 = DTR drop causes the modem to do a soft reset if
			the ATZ command was executed (&D3).
	• Bit 5: Modem’s DTR behavior:
		0	= The modem’s DTR remains on at all times
			(&C0).
		1	= The modem’s DTR follows the state of the TCP
			connection (&C1). (Default.)
	•	Bits 6-7: Ignored.
S25	Delay to DTR Off. The amount of time that the modem			0-255	s or 0.01 s	5
	will delay before taking the action specified by the
	AT&Dn command.

268 Chapter 3 Modem Emulation Commands