Digi 90000566_H manual Modem Emulation Commands 265

Modem Emulation AT Command Set

AT			Function	Result
Command				Code
	Return to on-line data mode. If the modem is in the on-line command mode,			OKn = 0 or 1
				and a
	the modem enters the on-line data mode. If the modem is in the off-line			connection
ATO	command mode (no connection), ERROR is reported.			exists.
	• O0, O1: If there is an active connection, switches the modem to data			ERROR
		mode.		Otherwise or if
				not connected.
	Quiet results codes control command. The command enables or disables
	the sending of the result codes to the DTE according to the parameter
	supplied. The parameter value, if valid, is written to S14 bit 2.			OK n=0 or 1
ATQn	• Q0: Enables result code to the DTE (Default).
				ERROR
	• Q1: Disables result code to the DTE.
				Otherwise
	• Q2: Disables “CONNECT” result codes.
	• Q3: Disables “CONNECT” result codes on incoming connections.
	Read/Write to the specified S-Register.
	•	n	Establishes S-register n as the last register accessed.	OK n=0 or 1
ATSn	•	n=v Sets S-Register n to the value v.
				ERROR
	•	n? Reports the value of S-Register n.		Otherwise
	See "S-Register Definitions" on page 267 for definitions of S-Registers.
	The verbose setting for result codes. This command selects the sending of
	short-form or long-form codes to the DTE. The parameter, if valid, is written			OK n=0 or 1
ATVn	to S14 bit 3.
	• V0: Result codes are issued in numeric or short form. Line feeds are not			ERROR
		issued before a short-form result.		Otherwise
	• V1: Result codes are issued in text or long form. This is the default.
ATZ	Load configuration. Reloads the S-register configuration from flash memory.			OK n=0 or 1
				ERROR
	See "S-Register Definitions" on page 267 for definitions of S registers.
				Otherwise
	DCD option. The Digi device controls the DCD output in accordance with			OK n=0 or 1
AT&Cn	the parameter supplied. The parameter value, if valid is written to S21 bit 5.
	• &C0: DCD remains ON at all times.			ERROR
	• &C1: DCD follows the state of the connection.			Otherwise
	DTR option. This command interprets the ON to OFF transition of the DTR
	signal from the DTE in accordance with the parameter supplied. The
	parameter value, if valid, is written to S21 bits 3 and 4. Also see S25.
	• &D0: DTR drop is ignored (assumed ON).			OK n=0 to 3
AT&Dn	• &D1: DTR drop is interpreted by the modem as if the asynchronous
		escape sequence had been entered. The modem returns to command		ERROR
		mode without disconnecting.		Otherwise
	• &D2: DTR drop causes the modem to hang up. (Default.)
	• &D3: DTR drop causes the modem to do a soft reset, as if the ATZ
		command was executed.
	Restore factory configuration. The device reloads the factory default S-			OK n=0 or 1
AT&F	register configuration from flash memory. The factory defaults are identified			ERROR
	for each command and in the S-Register descriptions. A configuration
	consists of a subset of S-Registers.			Otherwise

Chapter 3 Modem Emulation Commands 265