8: Line and Tunnel Settings
EDS1100/2100 Device Server User Guide
63
Table 8-19 Tunnel Disconnect Mode
5. Click
Submit.
6. Repeat above steps as desired, according to additional tunnel(s) available on your product.
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 EDS1100/2100, an “OK” message
is sent (but the command is silently ignored).
The EDS1100/2100 unit 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.
Tunnel – Disconnect
Mode Settings
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 device 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 8-20 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.)
