Hi,
I've got a couple of these working with RB912's. Make sure you have set the USB port to mini-pcie and not USB-A - the option is found in winbox under system / routerboard / usb.
The modem should then show up in the ports list and you can then configure a ppp session to use it as below:
ppp1.jpg
I'm using version R3B01 firmware. Some early versions of firmware are a bit flakey causing connection dropouts, R3B01 is reasonably stable although I have added a script to USB power reset the modem and routerboard if the link dies.
Other caveat is that some AT commands/responses are not recognised by routeros so don't panic if there are error messages when you use the info tab.
AT+CFUN=1 is mandatory in the init field to turn on the modems radio, otherwise it just sits there staring at you
.
Cheers
Jon
ZL1AFZ
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