I was wondering if anyone had or if it would even be possible to utilize the usb port on some routers as an auxiliary wan connection via a usb modem?
Topic: Routers with USB storage hacked for cell backup via GSM modem
The content of this topic has been archived on 23 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.
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This sounds like a job for 'mwan3'.
https://wiki.openwrt.org/doc/howto/mwan3
Note that you will need to configure the USB modem first so that Internet connectivity through the modem itself works as expected.
That is a very common use of OpenWrt. Any router with a USB port can run the modem drivers.
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