6: Line and Tunnel Settings
XPort AR User Guide
51
2.
Enter or modify the fields in
Table 6-8
.
3.
Click
Submit
.
Modem Emulation
The XPort AR supports Modem Emulation mode for devices that send out modem signals. There
are two different modes supported:
Command Mode—Sends verbal response codes.
Data Mode—Information transferred in gets transferred out.
It is possible to change the default settings for verbose response codes, echo commands, and
quiet mode, by using Command Mode commands. The current settings can be overridden;
however on reboot, the settings return to the programmed settings.
Configure the connect string as required. The connect string appends to the communication
packet when the modem connects to a remote location. It is possible to append additional text to
the connect message.
Command Mode
The Modem Emulation 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. All of these commands behave like a modem. For commands that are valid
but not applicable to the XPort AR, an “OK” message is sent (but the command is silently ignored).
The XPort AR attempts to make a Command Mode connection as per the IP/DNS/port numbers
defined in Connect Mode. It is possible to override the remote address, as well as the remote port
number.
Table 6-9
lists and describes the available commands.
Table 6-8
Tunnel Disconnect Mode Fields
Field
Description
Stop Character
Enter the stop character in ASCII, hexadecimal, or decimal
notation. Select
<None>
to disable.
Modem Control
Select
Enabled
to disconnect when the modem control pin is
not asserted on the serial line.
Timeout
Enter a time, in milliseconds, for the XPort AR to disconnect on
a timeout. The value 0 (zero) disables the idle timeout.
Flush Serial Data
Select
Enabled
to flush the serial data buffer on a
disconnection.
Table 6-9
Modem Emulation Commands and Descriptions
Command
Description
+++
Switches to Command Mode if entered from serial port during connection.
AT?
Help.
ATDT<Address Info>
Establishes the TCP connection to socket (<
ipaddress
>:<
port
>).
ATDP<Address Info>
See ATDT.
