Silex technology SX-550 manual AT Commands Parameter Description

Any AT command received, except the listed commands, are acknowledged with OK status. This allows existing modem applications to transmit commands without causing an error. These include AT<X>n, but not currently AT&<X>n, AT%<X>n, AT\<X>n, where <X> is a letter.

Table 16 AT Commands

Parameter

Command

Description

Enter Command mode	<delay>+++<delay>		If the string +++ is seen in data mode, with no
			characters sent for 1 second before or after, then
			command mode is entered.
Initiate Connection	ATD <destination>		Standard modem dialing command, redefined to
Command			initiate an internet connection to a remote computer.
			Indicates the IP address of the target, and optionally
			the TCP port number to use for connection. The T or
			P option (ATDT or ATDP) can be present and has
			no effect.
			If present, the IP address must be exactly 12 decimal
			digits with 3 for each byte of the address.
			If no IP address is given, then the ecable destination
			address defined for the port is used.
			If the destination TCP port is defined, it is separated
			from the IP address by a '#' character, and is 1 to 5
			decimal digits.
			If TCP port is defined, the ecable destination port
			defined for the serial port is used. If the destination
			port is 0, the standard Telnet port (23) is used.
			If the destination string ends with a semicolon, the
			server remains in the command mode, not the data
			mode, once a connection is made.
			In command mode data is not passed from the
			remote computer, so data could be lost if the unit
			stays in command mode.
			If the connection cannot be attempted, NO CARRIER
			status is returned. If the connection attempt fails, NO
			ANSWER status is returned.
			If the connection succeeds, CONNECT status is
			returned.
Echo control	ATEn		If n=0, commands are not echoed.
			If n=1, subsequent commands will be echoed.
			The default, upon unit reset, is for no echo (ATE0).
Disconnect	ATHn		If n=0, any connection to a remote host is dropped.
			Other value of n is ignored.
Return to data mode	ATOn		Exits command mode and places the serial port in
			the data mode.
			All subsequent data is sent to the network
			application, if connected, until an enter command
			mode sequence is received. Any value of n is
			ignored, if present.
Accessing Configuration Parameters		silex		Page 31

Part Number 40183-101