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4.4
USDG Control mode
In controlling mode, the EKI console server presents a modem interface to the
attached serial device: it accepts AT-style modem commands to connect / disconnect
to other networking device.
If you want a serial device running application program to connect/disconnect to
different devices on request, this function is available through the USDG Control
mode.
Please refer to the USDG TCP/UDP server operating mode to setup the Data Listen
Port, Command Listen Port, and Data Idle Timeout.
4.4.1
Hangup Character
The default character is "+". After you have connected to another serial device an via
EKI device, you may need to disconnect, using the command "+++". To do this, press
"+" three times and wait for the idle timeout <default value is 100ms>; the device will
disconnect. You can set "Guard Time" to define the idle time.
4.4.2
Guard Time
The default value is 1000 ms.
Example: <Guard Time>+++<Guard Time>
Control Mode is designed for use with legacy operating systems, such as MSDOS,
that do not support TCP/IP Ethernet. By connecting one of the EKI's serial ports to
the MS-DOS computer's serial port, it is possible to use legacy software originally
designed to transmit data via modem, but now transmitting data over the Ethernet.
Command
ATD <IP address><TCP
port><CR>
ATA <CR>
+++<CR>
EKI-1526NL-CS | 1528NL-CS User Manual
Figure 4.7 USDG Control Mode
Function
Forms a TCP connection to the specified host.
Ex: ATD 192.0.55.22:5201
In above example, the EKI console server forms a raw
TCP connection to the networking device (192.0.55.22).
The TCP port is 5201.
Answering an incoming call
Returns the user to the command prompt when entered
from the serial port during a remote host connection.
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