Lantronix I/O 2100, User Manual

Page: 170 / 190

B: Networking and Security
IntelliBox-I/O 2100 User Guide 170
starts, the serial port remains in Data Mode until the connection is dropped or the
serial port is placed in Command Mode by issuing the modem c++.
Command Mode
The Modem Emulation’s Command Mode supports the standard AT command set. For a
list of available commands from the serial or telnet login, enter AT? . Use ATDT , ATD ,
and ATDP to establish a connection:
+++ Switches to command mode if entered from serial port during
connection.
AT? Help.
ATDT<Address Info> Establishes the TCP connection to socket (<IP>/<port>).
ATDP<Address Info> See ATDT.
ATD Like ATDT. Dials default connect mode remote address and
port.
ATO Switches to data mode if connection still exists. Vice versa to
'+++'.
ATEn Switches echo in command mode (off – n = 0, on –n = 1).
ATH Disconnects the network session.
ATI Displays modem information.
ATS0 = n Accepts incoming connection. (n = 0: disable, n = 1: connect
automatically, n = 2+: connect with ATA command (basically
wait for the user or application to issue a command to "pick up
the phone")
ATQn Quiet mode (0 - enable results code, 1 - disable result codes)
ATVn Verbose mode (0 - numeric result codes, 1 - text result codes)
ATZ Restores the current state from the setup settings.
A/ Repeats last valid command.
These commands allow the IntelliBox to emulate a modem. The IntelliBox ignores valid
AT commands that do not apply to the IntelliBox and sends an OK response code.
In Command Mode, the IntelliBox can make a connection to the remote host using the
remote address and remote port information specified on the Tunnel – Connect Mode
page.
When making a connection from the IntelliBox using an ATDT or ATDP command, full or
partial IP addresses can be used. If a partial IP address is used, the IntelliBox uses the
remote address and port as configured in the Connect Mode settings.
For the following examples, we assume that the remote address is 192.168.16.10 and
the port is set to 10001 in the Connect Mode settings:
 Entering ATDT alone causes the IntelliBox to connect to the IP address and remote
port configured in Connect Mode.