Hi Dear Sir/Madam,
I’d like to inform you that for our project I need to integrate the Routerboard 751U 2HnD to 3G/2G network and for this case, I provided a 3G modem (Dlink DWM-156) but when I connect it to the USP port of the router, I haven’t found any USB Interface In the list of the Interfaces, meanwhile the router has detected the model of that modem. so would please help me that how can I resolve this issue?
Thanks a million.

