FWA505 Cellular Broadband drops after 24 hours

roblindsey

I've started using FWA505 and it's been fine since installed at the start of September, until the last couple of weeks.

I only use it for cellular broadband, there is no wired WAN, and a single connection from the LAN port to the WAN port of my main router.

The only configuration is to switch off all wifi, switch off LAN DHCP and change the LAN IP from the default, and switch on IP passthrough.

I'd upgraded the firmware to the latest at installation, and also upgraded to the latest again when I started getting issues. The firmware update to V1.60(ACKO.2)C0 hasn't made any difference.

I'm using an O2 SIM (consumer). I'm guessing the issue is perhaps related to DHCP renewal, but I don't see any way I can influence that for the cellular broadband.

Whilst it didn't really have any impact, I can see that previously I was getting an alert from my main router regarding temporary disconnections from the Zyxel FWA505 (essentially disconnected and immediately restored) every few days, which I also assume was potentially related to successful DHCP renewals.

Any ideas what the issue may be now?

I've tried a factory reset, or at least I thought I had - all settings defaulted except the admin password. This made no difference.

As it stands I'm having to manually reboot the FWA505 every day to restore service.