I have ER605 router with USB port and I would like to connect USB 4G LTE modem "D-Link DWM-222" to it, I have enabled USB WAN port but I see a status " USB Modem: Unknown Modem".
I have found table with supported types, yes there are only ZTE, Huawei and Alcatel. https://www.tp-link.com/us/er605/compatibility/
But in the other TP-Link routers there was an option for "manual configuration" of the USB modem via file, but I can't see that button for manual configuration in the ER605 web configuration interface. https://www.tp-link.com/ae/support/faq/270/
Could you help me how to add that modem there?