Westermo MRD-3x0 - Manual (Page 169)

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7.5 Unit Emulator
7.5.1 Description
The serial server provides an AT command interface at the
serial port that simulates a traditional dial-up unit. However,
instead of dialing out phone calls, the emulator creates TCP
network connections. The emulator will also simulate incom-
ing calls if it receives a TCP connection. The function is suited
to applications where equipment attached to the serial port
expects to see a dial-up unit.
7.5.2 Selecting the port function
The serial server configuration is accessed by selecting Serial
Server from the main menu and Port Setup from the submenu.
To enable a port for the Unit Emulator function, select Unit
Emulator from the Function column of the appropriate port.
Once selected, click Update to confirm the change. Once con-
firmed, the port will display as shown in Figure 123.
Figure 123: Selecting Unit Emulator function