User manual

NPort 5000AI-M12 Series Web Console Configuration
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Ethernet Modem Mode
Dial-in
The NPort 5000AI-M12 listens for a TCP/IP connection request from the remote Ethernet modem or host. The
NPort 5000AI-M12’s response depends on the ATS0 value, as outlined below.
ATS0=0 (default):
The NPort 5000AI-M12 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 the NPort 5000AI-M12 enters data mode. If no “ATA” command is received, the NPort 5000AI-M12
will disconnect after sending three “RING” signals.
ATS0≧1:
The NPort 5000AI-M12 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 NPort 5000AI-M12’s
serial port. After that, the NPort 5000AI-M12 immediately enters data mode.
Dial-out
The NPort 5000AI-M12 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 NPort 5000AI-M12 will send out the “CONNECT
<baud>“ signal via the serial port and then enter data mode.
Disconnection request from local site
When the NPort 5000AI-M12s is in data mode, the user can drive the DTR signal to OFF, or send “+++” from
the local serial port to the NPort 5000AI-M12. The NPort 5000AI-M12 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 NPort 5000AI-M12 will
send the “NO CARRIER” signal via the serial port and then return to command mode.