6: Line and Tunnel Settings
XPort Pro User Guide
52
Tunnel – Modem Emulation
A tunnel in Connect Mode can be initiated using modem commands incoming from the Serial Line.
This page enables you to configure the modem emulation settings when you select Modem
Emulation as the Tunnel Connect Mode type.
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 Pro, an “OK” message is sent (but the command is silently ignored).
The XPort Pro 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.
The following table lists and describes the available commands.
Table 6-19
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.
ATD
Like ATDT. Dials default Connect Mode remote address and port.
ATD<Address Info>
Sets up a TCP connection. A value of 0 begins a command line interface
session.
ATO
Switches to data mode if connection still exists. Vice versa to '+++'.
ATEn
Switches echo in Command Mode (off - 0, on - 1).
ATH
Disconnects the network session.
ATI
Shows modem information.
ATQn
Quiet mode (0 - enable results code, 1 - disable results code.)
ATVn
Verbose mode (0 - numeric result codes, 1 - text result codes.)
ATXn
Command does nothing and returns OK status.
ATUn
Accept unknown commands. (n value of 0 = off. n value of 1 = on.)
AT&V
Display current and saved settings.
AT&F
Reset settings in NVR to factory defaults.
AT&W
Save active settings to NVR.
ATZ
Restores the current state from the setup settings.
ATS0=n
Accept incoming connection.
N value of 0—Disable
N value of 1—Connect automatically
N value of 2+—Connect with ATA command.
ATA
Answer incoming connection (if ATS0 is 2 or greater).
