Quantum 560UF/D, 560UF/L manual 18

APPENDIX A. AT COMMANDS

ATLn *	Speaker volume		Default : 2
	ATL0	Selects low speaker volume
	ATL1	Selects low speaker volume
	ATL2	Selects medium speaker volume
	ATL3	Selects high speaker volume

ATMn *	Speaker control		Default : 1
	ATM0	Speaker is always off
	ATM1	Speaker is on during handshaking in call establishment but is
		turned off while the modem is receiving a carrier signal from
		a remote modem
	ATM2	Speaker is always on
	ATM3	Speaker goes off while the modem is receiving a carrier
		signal from a remote modem and while the modem is dialling.
		However, speaker is on during answering

ATNn *	Modulation handshake		Default : 1
	ATN0	Requires the speed of the connection be that specified by the
		value held in S37; if S37=0, the speed of the connection must
		match that at which the last AT command was issued. If the
		selected speed can be achieved using more than one
		communication standard (e.g., Bell 212A or ITU-T V.22 at
		1200bps), the modem also refers the selection made with the
		ATB command
	ATN1	Permits handshaking to occur at any speed supported by both
		modems. Enables automode detection. The ATB command is
		ignored in this mode and the modem attempts only ITU-T
		mode connections.

ATOn	Return to the on-line state		Default : 0
	ATO0	Causes the modem to return to the data mode
	ATO1	Causes the modem to return to the data mode and to initiate a
		retrain

ATP *	Set pulse dial as default
ATQn *	Result code display		Default : 0
	ATQ0	Allows the modem to send result codes to the DTE
	ATQ1	Prohibits the modem from sending result codes to the DTE
ATSn	Establish S register n as the default register
ATSn?	Reading S registers
	Reads the contents of the S register. All the S registers may be read.
ATSn=x	Writing to S registers
	Writes the value of x to the specified S register n

ACTIVE Professional External Modem User’s Manual 14