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IE-CS(T)-2TX-xRS232/485
Ethernet Modem Mode
Dial-in
The IE-CS(T)-2TX-xRS232/485 listens for a TCP/IP connection request from the remote Ethernet modem or
host. IE-CS(T)-2TX-xRS232/485's response depends on the ATS0 value, as outlined below.
ATS0=0 (default):
The IE-CS(T)-2TX-xRS232/485 will temporarily accept the TCP connection and then send the "RING" signal out
through the serial port. The serial controller must reply with "ATA" within 2.5 seconds to accept the connection
request, after which IE-CS(T)-2TX-xRS232/485 enters data mode. If no "ATA" command is received,
IE-CS(T)-2TX-xRS232/485 will disconnect after sending three "RING" signals.
ATS0 1:
The IE-CS(T)-2TX-xRS232/485 will accept the TCP connection immediately and then send the "CONNECT
<baud>" command to the serial port, in which <baud> represents the baudrate of the
IE-CS(T)-2TX-xRS232/485's serial port. After that, the IE-CS(T)-2TX-xRS232/485 immediately enters data
mode.
Dial-out
The IE-CS(T)-2TX-xRS232/485 accepts the AT command "ATD <IP>:<TCP port>" from the serial port and
then requests a TCP connection from the remote Ethernet Modem or PC. This is where <IP> is the IP address
of the remote Ethernet modem or PC, and <TCP port> is the TCP port number of the remote Ethernet modem
or PC. Once the remote unit accepts this TCP connection, the IE-CS(T)-2TX-xRS232/485 will send out the
"CONNECT <baud>" signal via the serial port and then enter data mode.
Disconnection request from local site
When the IE-CS(T)-2TX-xRS232/485 is in data mode, the user can drive the DTR signal to OFF, or send "+++"
from the local serial port to the IE-CS(T)-2TX-xRS232/485. The IE-CS(T)-2TX-xRS232/485 will enter
command mode and return "NO CARRIER" via the serial port, and then input "ATH" to shut down the TCP
connection after 1 second.
NOTE
The "+++" command cannot be divided. The "+" character can be changed in register S2, and the guard time,
which prefixes and suffixes the "+++" in order to protect the raw data, can be changed in register S12.
After the TCP connection has been shut down by the remote Ethernet modem or PC, the
IE-CS(T)-2TX-xRS232/485 will send the "NO CARRIER" signal via the serial port and then return to command
mode.
5-27
Web Console Configuration
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