NPort 5110 Series User’s Manual | Web Console Configuration |
Ethernet Modem
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| NPort 5110 listens for a TCP/IP connection request from the remote Ethernet modem or host. |
| NPort 5110’s response depends on the ATS0 value, as outlined below. |
| ATS0=0 (default): |
| NPort 5110 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 5110 enters data mode. If no “ATA” command is received, NPort 5110 will |
| disconnect after sending three “RING” signals. |
| ATS0≧1: |
| NPort 5110 will accept the TCP connection immediately and then send the “CONNECT <baud>” |
| command to the serial port, in which <baud> represents the baud rate of NPort 5110’s serial port. After |
| that, NPort 5110 immediately enters data mode. |
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| NPort 5110 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 5110 |
| will send out the “CONNECT <baud>” signal via the serial port and then enter data mode. |
| Disconnection request from local site |
| When NPort 5110s is in data mode, the user can drive the DTR signal to OFF, or send “+++” from |
| the local serial port to NPort 5110. NPort 5110 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. |
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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. |
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