Performing remote troubleshooting of a WWAN connection absolutely requires a functional separate Internet connection (e.g. an xDSL connection), which can be used to connect to the device.
- Yes: SIM card is inserted
- No: SIM card is not inserted
The mobile interface uses a scan initiated manually in LANmonitor or from the command line to search for all available cellular networks and logs into the mobile network with the best signal quality. If this login process fails, the mobile interface uses the semi-automatic network selection.
- do /Status/Modem-Mobile/Scan-Networks -s -f
This command initially disconnects any existing 3G/4G WAN connection, it then performs an extended scan and the best network is selected and stored to the configuration. This command is useful in combination with "Semi automatic" and "manual" network selection. The stored network also applies after a device restart (Cold/Warm boot) until Scan-Networks -s/-e is executed, for all modes but automatic. Results of the scan are available at /Status/Modem-Mobile/Network-List. - do /Status/Modem-Mobile/Scan-Networks -e -f
This command initially disconnects any existing 3G/4G WAN connection and it then performs an extended scan. The -e parameter ensures that the best network is found, but this is not entered in the configuration. However, the entry is made in the status tree. - do /Status/Modem-Mobile/Scan-Networks -s
This command is used to perform a network scan only with an inactive WWAN connection.
- How to update the firmware of the 4G WWAN module is described in this following Knowledge Base article.
- How to update the firmware of the 3G WWAN module is described in this Knowledge Base article .
8) Enter the Network Name as Mobile Network Code when using manual Network selection:
If the Network selection in the used Mobile profile (under Interfaces → WAN → Mobile profiles) is set to Manual, the unique Mobile Network Code (MNC) should be entered as the Network name.
9) Capture traces for analysis:
The procedure to create a trace with a prefabricated trace configuration is described in this Knowledge Base article.
9.2) Start the trace with a click on the button with the green arrow and record the error state.
The dial-in attempt or the termination of the connection has to be included in the trace output!
9.3) Stop the trace with a click on the button with the stop sign and save it with a click on the button with the floppy disk symbol .
10) Sending the information to LANCOM Support:
If the problem should still persist after conducting the steps in this guide, please contact LANCOM Support and attach the following information:
- Time of the dial-in attempt or connection termination
- Trace in the error state created with the attached trace configuration (*.lct file)
- Up to date configuration file of the router (*.spf file)
