Accessing Configuration Parameters silex Page 31
Part Number 40183-101
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
Command
ATD <destination> Standard modem dialing command, redefined to
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.