Westermo MRD-3x0 - Manual (Page 46)

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3.4.1 CSD Single Port
The simplest configuration for Circuit Switched Data (CSD) is
single port operation, this means that when a connection is
established the pre-configured serial port is always connected.
The Circuit switched mode settings are access by select-
ing the Wireless tab from the main menu and then Circuit
switched mode from the sub-menu, Figure 41 shows the Circuit
switched mode page. The selected port will always be provid-
ed with a standard "AT" command interface, allowing a device
attached to the port to initiate dialing and answer incoming
calls.
Figure 41: Circut Switched Data (CSD) mode page.
1. Set the Operating mode to Direct to single port and click
Update.
2. Click on the Edit icon of desired serial port to access unit
configuration. A new screen will be displayed.
3. Set the number of rings until answered, the DCD Mode and
the DTR function for the port selected in step 2.
4. Click Update to save the changes.