ZyXEL Communications 3356P user manual AT Command Set Summaries, Basic AT Command Set

4	AT Command Set Summaries
Basic AT Command Set
Command		Options	Function & Description
A/			Re-execute the last command string
<any			Terminate the current connection attempt when entered in handshaking
key>			state
All the following commands require an “AT” prefix
A			Go off-hook and attempt to establish a connection without waiting for a
			ring
Bn			Line modulation options
		B0	Select V.22 mode for 1200 bps connection
		B1 *	Select Bell 212A for 1200 bps connection
		B2	Select V.23 1200 bps for receiving, 75 bps for transmitting in originate
			mode; 75 bps
			for receiving and 1200 bps for transmitting in answer mode
		B3	Select V.23 75 bps for receiving, 1200 bps for transmitting in originate
			mode; 1200 bps for receiving and 75 bps for transmitting in answer mode
		B15	Select V.21 for 300 bps connection
		B16	Select Bell 103 for 300 bps connection
Dn			Dial command, beginning the dialing sequence. The string “n” (telephone
			number and modifiers) listed as follows is entered after the “D”
			command
		L	Re-dial last number. Should be the first character following ATD,
			ignored otherwise
		P	Pulse dial.
		R	Reverse dial. Originate call in answer mode (go on-line in answer mode)
		S=n	Dial the phone number stored in NVRAM at location “n” (n=0, 1, 2, 3)
		T	DTMF tone dial.
		W	Wait for second dial tone. The modem waits for the second dial tone
			before processing the dial string
		,	Pause. Cause the modem to pause for a time before processing the next
			character in the dial string (specified by S8 register)
		!	Hook Flash (for call transfer). Cause the modem to go on-hook for 0.5
			second then return to off-hook
		@	Wait for 5 seconds of silence after dialing number
		;	Return to command state after dialing a number without disconnecting
			the call
En			AT command echo options
		E0	Echo disabled
		E1 *	Echo enabled
Hn			Switch-hook control
		H0 *	Modem goes on-hook
		H1	Modem goes off-hook
Mn			Speaker control
		M0	Speaker always off
		M1 *	Speaker on until carrier present

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