Item Notes Description
Operation Mode Mandatory field. Select RFC-2217 mode.
Listen Port Default setting: 4001
Value Range: 1 -
65535
Enter the listening port of the RFC-2217 connection.
Value Range: 1 - 65535
Trust Type Default setting:
Allow All
Choose Allow All to allow any clients to connect. Otherwise
choose Specific IP to limit certain clients.
Connection Idle
Timeout
Default setting: 0 The TCP connection is disconnected when the idle time has
elapsed.
Enter the idle timeout period in minutes.
Note – Idle timeout is only available when On-
Demand is selected in the Connection Control
field, see above.
Alive Check
Timeout
Default setting: 0 The TCP connection is terminated if it does not receive a
response from an alive-check before this time period has
elapsed.
Enter the time period of alive check timeout in minutes.
Enable Disabled by default. Check  Enable to activate the corresponding serial port in
the specified operation mode.
Edit Button Click Edit to add or change an Operation Mode Definition.
Save Button Click Save to save the settings
Undo Button Click Undo to cancel the settings
Table 135 – Operation Mode Definition for each Serial Port –RFC-2217 Mode
5.1.2.8 Specify Remote Host for Access
If you selected Specific IPs as the Trust Type, the Trusted IP Definition section appears. The settings are valid for both TCP
Server and RFC-2217 modes.
Figure 230 – Trusted IP Definition - TCP Server