WSJT-X and RUMlog

WSJT-X and RUMlog can exchange data. Therefore two different connections are established over the local network, even when both applications are running on the same computer. WSJT-X broadcasts status and qso data via UDP, while a tcp/ip connection is used for CAT data. Since standard protocols are used, both application can be run on different computers in the same local network.

Network preferences



All functions you want to use, have to be configured before. In WJST-X the preferences ofr CAT can be found in Preferences –> Radio, preferences for other data exchange are located in Preferences –> Reporting –> UDP Server.


Preferences –> Reporting –> UDP Server

For use with RUMLog, just the settings on the left hand side are required. The entered address or hostname has to ensure, RUMlog can be reached in the LAN. You can enter the specific address (i.e. localhost, or or a broadcast address like to provide information in the whole LAN.
The port has to match the setting in RUMlog Data port


Preferences –> Radio

In the Rig popup menu you have to select DX Lab Suite Commander. The server address or host name has to be the computer where RUMlog is running. The port has to match the setting in RUMlog CAT port
RUMlog dosen’t support the WSJT-X split function. You have to set the option Split Operation to None. Futher more the option Mode must be set to None

Switch PTT

RUMlog can switch the PTT of your trx when commanded by WSJT-X. This is possible via the CAT or data connection. In RUMlog Preferences –> TX1 –> Transceiver –> For PTT use you have to configure your PTT switching method first.
If you want to use the data UDP connection, activate the option Switch PTT in Preferences–>UDP–>WSJT-X (RUMlog)
If you want to use the CAT tcp/ip connection, set the option CAT in Preferences –> Radio –> PTT Method (WSJT-X). No further setting required in RUMlog.

Save QSOs to logbook

When this option is set, every QSO you save in WSJT-X will be saved in RUMlog as well. Except the QSO start time, all information from the Log QSO dialog will be used. An action in RUMlog is not required.
You can define the Paper QSL status to Send QSL (W) or to No QSL (-). Further you can set the QSO color code for the auto-imported QSOs.
QSO data from WSJT-X will be written directly into the logbook database. If you want to add more data (HamQTH/, you have to disable this option and save the QSO manually.

Call check

When the active callsign in WSJT-x changes, a set of QSO date will be sent to RUMlog. Following information are transfered to the logging fields:

The callsign check starts automatically. You can use these data to log a QSO manually.

Populate dx-spot table

Decoded messages from WSJT-X can be shown in the dx-spot window. This works only correct, when the correct sequence is used.
“CQ DX DL2RUM” will fail, correct is: “CQ DL2RUM DX”.

When the spot is a cq call from WSJT-X, you can double click on the frequency to activate this station in WSJT-X.

CQ calls only

When this option is set, only cq calls will be listed in the dx-spot window.


To use the CAT functions, you transceiver has to be connected with RUMlog. You have to start RUMlog always first. RUMlog forwards the frequency to WSJT-X. You can use the frequency popup menu in WSJT-X to command RUMlog to QSY the trx. The trx will be set to the mode, you have selected for PSK operation.

External Links



UDP description