Best Of

@BruCom @RobTheNetworkGuy @Rabarbaro A few news:

• sys resetcm is interesting as it restarts the LTE module, you might try it next time you face the issue
• cfg cellwan_mapn edit --Index 1 is the fastest way to refresh the LTE connection, it's interesting if it's getting slow for example but won't fix the connection issue
• After my tests, I faced a situation were ifconfig was not showing wwan0 interface anymore and cfg cellwan_status get was telling LTE status Up… neither resetcm and cellwan_mapn were able to restore the missing interface and I has to reboot from the GUI

And now the most interesting part 😀

• sys atcr reboot will revert to default "saved" settings, and those settings are saved in "rom-d" whatever it is: by default these are factory settings
• zycli save_default save will save your current configuration into "rom-d", and at this time you can now use sys atcr reboot to reboot the device without loosing the settings!
• To revert the "rom-d" to default settings if you need to, 1st use zycli save_default clean and the sys atcr reboot

A full expect script is on progress, I need some more tests to finalize it.

Dear Zyxel community, greetings from Italy.

I really need your help before to surrender and return the above mentioned device to Amazon.

I like the LTE5398-M904 and would like to keep it but there is an issue should be solved.

The issue is that, with a random frequency, the Internet is not accessible despite the corresponding led is on and green and the web interface shows the cellular WAN is up and running.

Also the ping function in the modem diagnostic menu is not able to access the Internet.

I’ve the logging turned on and these are the few events before the issue occurs:

Mar 12 12:07:24 user.notice RILCMD: cid: 1 cgact_status[0]:1
Mar 12 12:07:29 user.notice RILCMD: Device UP in quectel_eg18_update()
Mar 12 12:07:29 user.notice RILCMD: set_LTE_connection_status: Up 
Mar 12 12:07:38 user.notice RILCMD: RILCMD STATE: RS_UPDATE ============> RS_READY
Mar 12 12:07:57 user.warning RILCMD: [LTE Cell info] RFCN:1500, Cell_ID:257687890, PCI:52, RSRP:-74
Mar 12 12:07:57 user.notice RILCMD: [LTE Cell info] RFCN:1500, Cell_ID:257687890, PCI:52, RSRP:-74
Mar 12 12:07:57 user.notice RILCMD: [IP info] IPv4:10.95.144.171
Mar 12 12:07:57 user.notice RILCMD: [IP info] IPv6:

Thank you to anyone can provide a solution.

Hi @BruCom,

from my point of view, the switch button can work both when device is on and off.

Just to insure to connect external antennas when switching to EXT port !

@RobTheNetworkGuy That makes sense. (1) When IPv6 is disabled, network is lost everytime DHCP changes the IPv4 address, every 12 hours in my case. APN "refresh" is sufficient to restore the conection. (2) When IPv6 is enabled, it seems to work a little better as if the IPv6 stack was detecting the change and update the config of the router including its new IPv4 parameters. However, after a few days (from 1 to 5 days or more), the connection gets lost again and this time APN "refresh" is not enough and a full reboot is required.

I will check cellwan_status next time.