Moxa NPORT 5110-T Instrukcja Użytkownika Pobierz pdf (Strona 45)

NPort 5100 Series Web Console Configuration

5-22

Ethernet Modem Mode

Dial-in

NPort 5100 listens for a TCP/IP connection request from the remote Ethernet modem or host. NPort 5100’s

response depends on the ATS0 value, as outlined below.

ATS0=0 (default):

NPort 5100 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 NPort 5100 enters data mode. If no “ATA” command is received, NPort 5100 will disconnect after sending

three “RING” signals.

ATS0

≧

NPort 5100 will accept the TCP connection immediately and then send the “CONNECT <baud>” command to

the serial port, in which <baud> represents the baudrate of NPort 5100’s serial port. After that, NPort 5100

immediately enters data mode.

Dial-out

NPort 5100 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, NPort 5100 will send out the “CONNECT <baud>” signal via the serial port and

then enter data mode.

Disconnection request from local site

When NPort 5100s is in data mode, the user can drive the DTR signal to OFF, or send “+++” from the local

serial port to NPort 5100. NPort 5100 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.

Disconnection request from remote site

After the TCP connection has been shut down by the remote Ethernet modem or PC, NPort 5100 will send the

“NO CARRIER” signal via the serial port and then return to command mode.

AT Commands

NPort 5100 supports the following common AT commands used with a typical modem:

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